{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T06:17:21Z","timestamp":1776061041498,"version":"3.50.1"},"reference-count":120,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,9,16]],"date-time":"2022-09-16T00:00:00Z","timestamp":1663286400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Center of Excellence Geopolymer and Green Technology (CEGeoGTech)"},{"name":"Faculty of Mechanical Engineering and Technology"},{"name":"TUIASI from the University Scientific Research Fund (FCSU)"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Coatings"],"abstract":"<jats:p>Today, the building and construction sector demands environmentally friendly and sustainable protective coatings using inorganic coating materials for safe, non-hazardous, and great performance. Many researchers have been working on sustainable solutions to protect concrete and metal infrastructures against corrosion and surface deterioration with the intention of introducing green alternatives to conventional coatings. This article presents a review of developments of geopolymer pastes doped with different types of photocatalyst precursors including factors affecting geopolymer properties for enhancing coating with photocatalytic performance. Photodegradation using geopolymer photocatalyst has great potential for resolving harmless substances and removing pollutants when energized with ultraviolet (UV) light. Although geopolymer is a potentially new material with great properties, there has been less research focusing on the development of this coating. This study demonstrated that geopolymer binders are ideal precursor support materials for the synthesis of photocatalytic materials, with a significant potential for optimizing their distinctive properties.<\/jats:p>","DOI":"10.3390\/coatings12091348","type":"journal-article","created":{"date-parts":[[2022,9,18]],"date-time":"2022-09-18T22:12:43Z","timestamp":1663539163000},"page":"1348","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["The Suitability of Photocatalyst Precursor Materials in Geopolymer Coating Applications: A Review"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6984-6512","authenticated-orcid":false,"given":"Liyana","family":"Jamaludin","sequence":"first","affiliation":[{"name":"Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"},{"name":"Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5499-8564","authenticated-orcid":false,"given":"Rafiza Abd","family":"Razak","sequence":"additional","affiliation":[{"name":"Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"},{"name":"Faculty of Civil Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"}]},{"given":"Mohd Mustafa Al Bakri","family":"Abdullah","sequence":"additional","affiliation":[{"name":"Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"},{"name":"Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3593-9400","authenticated-orcid":false,"given":"Petrica","family":"Vizureanu","sequence":"additional","affiliation":[{"name":"Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, 41 D. Mangeron Street, 700050 Iasi, Romania"},{"name":"Technical Sciences Academy of Romania, Dacia Blvd 26, 030167 Bucharest, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6292-2073","authenticated-orcid":false,"given":"Ana","family":"Bras","sequence":"additional","affiliation":[{"name":"Built Environment and Sustainable Technologies (BEST) Research Institute, Liverpool John Moores University, Liverpool L3 2ET, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3220-7669","authenticated-orcid":false,"given":"Thanongsak","family":"Imjai","sequence":"additional","affiliation":[{"name":"Center of Excellence in Sustainable Disaster Management, School of Engineering and Technology, Walailak University, Nakhonsithammarat 80161, Thailand"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9292-749X","authenticated-orcid":false,"given":"Andrei Victor","family":"Sandu","sequence":"additional","affiliation":[{"name":"Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, 41 D. Mangeron Street, 700050 Iasi, Romania"},{"name":"Department of Research, Development and Innovation, Romanian Inventors Forum, Str. Sf. P. Movila 3, 700089 Iasi, Romania"},{"name":"National Institute for Research and Development for Environmental Protection INCDPM, 294 Splaiul Independentei, 060031 Bucharest, Romania"}]},{"given":"Shayfull Zamree","family":"Abd Rahim","sequence":"additional","affiliation":[{"name":"Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7093-7833","authenticated-orcid":false,"given":"Heah Cheng","family":"Yong","sequence":"additional","affiliation":[{"name":"Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Perlis 01000, Malaysia"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1155\/2020\/8880974","article-title":"A Review of the Engineering Properties of Metakaolin Based Concrete: Towards Combatting Chloride Attack in Coastal\/Marine Structures","volume":"2020","author":"Pillay","year":"2020","journal-title":"Adv. Civ. Eng."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Petroche, D.M., and Ramirez, A.D. (2022). The Environmental Profile of Clinker, Cement, and Concrete: A Life Cycle Perspective Study Based on Ecuadorian Data. Buildings, 12.","DOI":"10.3390\/buildings12030311"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Zhang, J., Tian, B., Wang, L., Xing, M., and Lei, J. (2018). Mechanism of Photocatalysis. Photocatalysis. Lecture Notes in Chemistry, Springer.","DOI":"10.1007\/978-981-13-2113-9"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Zailan, S.N., Mahmed, N., Abdullah, M.M.A.B., Rahim, S.Z.A., Halin, D.S.C., Sandu, A.V., Vizureanu, P., and Yahya, Z. (2022). Potential Applications of Geopolymer Cement-Based Composite as Self-Cleaning Coating: A Review. Coatings, 12.","DOI":"10.3390\/coatings12020133"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"714","DOI":"10.1016\/j.trpro.2016.05.338","article-title":"Influence of Volatile Organic Compounds Emissions from Road Marking Paints on Ground-Level Ozone Formation: Case Study of Krak\u00f3w, Poland","volume":"14","author":"Burghardt","year":"2016","journal-title":"Transp. Res. Procedia"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"106945","DOI":"10.1016\/j.porgcoat.2022.106945","article-title":"Identification of Factors Affecting the Reduction of VOC Emissions in the Paint Industry: Systematic Literature Review-SLR","volume":"170","year":"2022","journal-title":"Prog. Org. Coat."},{"key":"ref_7","unstructured":"Zhu, A. (2020). Feasibility Study on Novel Fire-Resistant Coating Materials. [Master\u2019s Thesis, Missouri University of Science and Technology]."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"01065","DOI":"10.1051\/matecconf\/20167801065","article-title":"Review on Potential of Geopolymer for Concrete Repair and Rehabilitation","volume":"78","author":"Mustafa","year":"2016","journal-title":"MATEC Web Conf."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Falah, M., and Mackenzie, K.J.D. (2020). Photocatalytic Nanocomposite Materials Based on Inorganic Polymers (Geopolymers): A Review. Catalysts, 10.","DOI":"10.20944\/preprints202009.0296.v1"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/j.jenvman.2017.04.099","article-title":"Application of Doped Photocatalysts for Organic Pollutant Degradation\u2014A Review","volume":"198","author":"Khaki","year":"2017","journal-title":"J. Environ. Manag."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Mashuri, S.I.S., Ibrahim, M.L., Kasim, M.F., Mastuli, M.S., Rashid, U., Abdullah, A.H., Islam, A., Asikin-Mijan, N., Tan, Y.H., and Mansir, N. (2020). Photocatalysis for Organic Wastewater Treatment: From the Basis to Current Challenges for Society. Catalysts, 10.","DOI":"10.3390\/catal10111260"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jphotochemrev.2017.01.005","article-title":"Applied Photoelectrocatalysis on the Degradation of Organic Pollutants in Wastewaters","volume":"31","author":"Brillas","year":"2017","journal-title":"J. Photochem. Photobiol. C Photochem. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Rabajczyk, A., Zielecka, M., Klapsa, W., and Dziechciarz, A. (2021). Self-Cleaning Coatings and Surfaces of Modern Building Materials for the Removal of Some Air Pollutants. Materials, 14.","DOI":"10.3390\/ma14092161"},{"key":"ref_14","first-page":"6557","article-title":"Metal Oxide Nanoparticles and Their Nanocomposite-Based Materials as Photocatalysts in the Degradation of Dyes","volume":"12","author":"Joshi","year":"2022","journal-title":"Biointerface Res. Appl. Chem."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Dharma, H.N.C., Jaafar, J., Widiastuti, N., Matsuyama, H., Rajabsadeh, S., Othman, M.H.D., Rahman, M.A., Jafri, N.N.M., Suhaimin, N.S., and Nasir, A.M. (2022). A Review of Titanium Dioxide (TiO2)-Based Photocatalyst for Oilfield-Produced Water Treatment. Membranes, 12.","DOI":"10.3390\/membranes12030345"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Anucha, C.B., Altin, I., Bacaksiz, E., and Stathopoulos, V.N. (2022). Titanium Dioxide (TiO\u2082)-Based Photocatalyst Materials Activity Enhancement for Contaminants of Emerging Concern (CECs) Degradation: In the Light of Modification Strategies. Chem. Eng. J. Adv., 10.","DOI":"10.1016\/j.ceja.2022.100262"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"536","DOI":"10.1016\/j.rser.2017.08.020","article-title":"A Review of ZnO Nanoparticles as Solar Photocatalysts: Synthesis, Mechanisms and Applications","volume":"81","author":"Ong","year":"2018","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.tsf.2015.12.064","article-title":"Recent Progress on Doped ZnO Nanostructures for Visible-Light Photocatalysis","volume":"605","author":"Samadi","year":"2016","journal-title":"Thin Solid Films."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1016\/j.watres.2015.09.045","article-title":"Recent Developments of Zinc Oxide Based Photocatalyst in Water Treatment Technology: A Review","volume":"88","author":"Lee","year":"2016","journal-title":"Water Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"106025","DOI":"10.1016\/j.jece.2021.106025","article-title":"Tailored BiVO4 for Enhanced Visible-Light Photocatalytic Performance","volume":"9","author":"Sharifi","year":"2021","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1016\/j.jallcom.2019.07.051","article-title":"Efficient Facet Regulation of BiVO4 and Its Photocatalytic Motivation","volume":"804","author":"Shan","year":"2019","journal-title":"J. Alloys Compd."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1016\/j.jiec.2021.03.040","article-title":"Oxidative Desulfurization of Refinery Diesel Pool Fractions Using LaVO4 Photocatalyst","volume":"98","author":"Shafiq","year":"2021","journal-title":"J. Ind. Eng. Chem."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"166653","DOI":"10.1016\/j.jallcom.2022.166653","article-title":"Novel Z-Scheme LaVO4\/Bi3O4Cl Heterojunctions for Highly Efficient Degradation of Ofloxacin under Visible Light Irradiation","volume":"925","author":"Zhang","year":"2022","journal-title":"J. Alloys Compd."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Qi, C., Bao, W., Wang, L., Li, H., and Wu, W. (2017). Study of the V2O5-WO3\/TiO2 Catalyst Synthesized from Waste Catalyst on Selective Catalytic Reduction of NOx by NH3. Catalysts, 7.","DOI":"10.3390\/catal7040110"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Burduhos Nergis, D.D., Vizureanu, P., Ardelean, I., Sandu, A.V., Corbu, O.C., and Matei, E. (2020). Revealing the Influence of Microparticles on Geopolymers\u2019 Synthesis and Porosity. Materials, 13.","DOI":"10.3390\/ma13143211"},{"key":"ref_26","first-page":"145","article-title":"Assessment of Alkali Activated Geopolymer Binders as an Alternative of Portland Cement","volume":"54","author":"Abdullah","year":"2017","journal-title":"Mater. Plastice."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"301","DOI":"10.30638\/eemj.2009.043","article-title":"Materials Processing using Solar Energy","volume":"8","author":"Vizureanu","year":"2009","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Azimi, E.A., Abdullah, M.M.A.B., Vizureanu, P., Salleh, M.A.A.M., Sandu, A.V., Chaiprapa, J., Yoriya, S., Hussin, K., and Aziz, I.H. (2020). Strength Development and Elemental Distribution of Dolomite\/Fly Ash Geopolymer Composite under Elevated Temperature. Materials, 13.","DOI":"10.3390\/ma13041015"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1262","DOI":"10.37358\/RC.19.4.7106","article-title":"Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates","volume":"70","author":"Vizureanu","year":"2019","journal-title":"Rev. De Chim."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"2917","DOI":"10.1007\/s10853-006-0637-z","article-title":"Geopolymer Technology: The Current State of the Art","volume":"42","author":"Duxson","year":"2007","journal-title":"J. Mater. Sci."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.fuel.2012.03.024","article-title":"A Review of the Multi-Component Utilisation of Coal Fly Ash","volume":"97","author":"Blissett","year":"2012","journal-title":"Fuel"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1016\/j.jenvman.2018.07.046","article-title":"A Review on Geopolymers as Emerging Materials for the Adsorption of Heavy Metals and Dyes","volume":"224","author":"Siyal","year":"2018","journal-title":"J. Environ. Manag."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1633","DOI":"10.1007\/BF01912193","article-title":"Geopolymers","volume":"37","author":"Davidovits","year":"1991","journal-title":"J. Therm. Anal."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"050013","DOI":"10.1063\/1.5011552","article-title":"Effect of Na2SiO3\/NaOH on Mechanical Properties and Microstructure of Geopolymer Mortar Using Fly Ash and Rice Husk Ash as Precursor","volume":"1903","author":"Saloma","year":"2017","journal-title":"AIP Conf. Proc."},{"key":"ref_35","first-page":"247","article-title":"Mechanism and Chemical Reaction of Fly Ash Geopolymer Cement\u2014A Review","volume":"1","author":"Kamarudin","year":"2011","journal-title":"J. Asian Sci. Res."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1515\/epoly-2022-0015","article-title":"State of the Art of Geopolymers: A Review","volume":"22","author":"Castillo","year":"2022","journal-title":"E-Polymer"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"15532","DOI":"10.1021\/acsomega.1c00662","article-title":"Recent Advances in Fly-Ash-Based Geopolymers: Potential on the Utilization for Sustainable Environmental Remediation","volume":"6","author":"Adewuyi","year":"2021","journal-title":"ACS Omega"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1080\/21870764.2019.1693682","article-title":"Effect of Nano-ZnO on Mechanical and Thermal Properties of Geopolymer","volume":"8","author":"Zidi","year":"2020","journal-title":"J. Asian Ceram. Soc."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Cao, R., Fang, Z., Jin, M., and Shang, Y. (2022). Study on the Activity of Metakaolin Produced by Traditional Rotary Kiln in China. Minerals, 12.","DOI":"10.3390\/min12030365"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Rocha, J., and Klinowski, J. (1990). Physics and Chemistry of Minerals, 295i and 27A1 Magic-Angle-Spinning NMR Studies of the Transformation of Kaolinite, University of Cambridge.","DOI":"10.1007\/BF00199671"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"644","DOI":"10.1016\/j.matlet.2018.11.016","article-title":"In-Situ Synthesis of Zeolites by Geopolymerization of Biomass Fly Ash and Metakaolin","volume":"236","author":"Ribeiro","year":"2019","journal-title":"Mater. Lett."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1016\/j.jclepro.2016.03.019","article-title":"Fly Ash-Based Geopolymer: Clean Production, Properties and Applications","volume":"125","author":"Zhuang","year":"2016","journal-title":"J. Clean. Prod."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Kalombe, R.M., Ojumu, V.T., Eze, C.P., Nyale, S.M., Kevern, J., and Petrik, L.F. (2020). Fly Ash-Based Geopolymer Building Materials for Green and Sustainable Development. Materials, 13.","DOI":"10.3390\/ma13245699"},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Prochon, P., Zhao, Z., Courard, L., Piotrowski, T., Michel, F., and Garbacz, A. (2020). Influence of Activators on Mechanical Properties of Modified Fly Ash Based Geopolymer Mortars. Materials, 13.","DOI":"10.3390\/ma13051033"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"9","DOI":"10.3389\/fmats.2019.00009","article-title":"The Effect of Blast Furnace Slag\/Fly Ash Ratio on Setting, Strength, and Shrinkage of Alkali-Activated Pastes and Concretes","volume":"6","author":"Humad","year":"2019","journal-title":"Front. Mater."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"669","DOI":"10.1007\/s10098-020-01811-4","article-title":"Preparation of Geopolymer Concrete Using Egyptian Kaolin Clay and the Study of Its Environmental Effects and Economic Cost","volume":"22","author":"Abbas","year":"2020","journal-title":"Clean Technol. Environ. Policy"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1016\/j.jmrt.2020.11.104","article-title":"Characteristics of Metakaolin-Based Geopolymer Concrete for Different Mix Design Parameters","volume":"10","author":"Albidah","year":"2021","journal-title":"J. Mater. Res. Technol."},{"key":"ref_48","first-page":"30","article-title":"The Possibility of Using Slag for the Production of Geopolymer Materials and Its Influence on Mechanical Performances\u2014A Review","volume":"63","author":"Ionescu","year":"2020","journal-title":"Proceedings"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"860","DOI":"10.14419\/ijet.v7i3.12.16551","article-title":"Study on Self-Cleaning Concrete Using Nano-Liquid TiO2","volume":"7","author":"Vignesh","year":"2018","journal-title":"Int. J. Eng. Technol."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Ameta, R., Solanki, M.S., Benjamin, S., and Ameta, S.C. (2018). Photocatalysis. Advanced Oxidation Processes for Wastewater Treatment: Emerging Green Chemical Technology, Elsevier Inc.","DOI":"10.1016\/B978-0-12-810499-6.00006-1"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Zhang, F., Wang, X., Liu, H., Liu, C., Wan, Y., Long, Y., and Cai, Z. (2019). Recent Advances and Applications of Semiconductor Photocatalytic Technology. Appl. Sci., 9.","DOI":"10.3390\/app9122489"},{"key":"ref_52","doi-asserted-by":"crossref","unstructured":"Molinari, R., Lavorato, C., and Argurio, P. (2020). Visible-Light Photocatalysts and Their Perspectives for Building Photocatalytic Membrane Reactors for Various Liquid Phase Chemical Conversions. Catalysts, 10.","DOI":"10.3390\/catal10111334"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1002\/cey2.66","article-title":"Photocatalytic Activity Enhanced via Surface Hybridization","volume":"2","author":"Guo","year":"2020","journal-title":"Carbon Energy."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"6814","DOI":"10.1021\/acs.jpclett.8b02892","article-title":"How To Correctly Determine the Band Gap Energy of Modified Semiconductor Photocatalysts Based on UV-Vis Spectra","volume":"9","author":"Pacia","year":"2018","journal-title":"J. Phys. Chem. Lett."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"33","DOI":"10.3389\/fchem.2018.00033","article-title":"Understanding Mechanism of Photocatalytic Microbial Decontamination of Environmental Wastewater","volume":"6","author":"Regmi","year":"2018","journal-title":"Front. Chem."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.cattod.2009.06.018","article-title":"Decontamination and Disinfection of Water by Solar Photocatalysis: Recent Overview and Trends","volume":"147","author":"Malato","year":"2009","journal-title":"Catal. Today"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1002\/cey2.179","article-title":"Advances in Z-Scheme Semiconductor Photocatalysts for the Photoelectrochemical Applications: A Review","volume":"4","author":"Li","year":"2022","journal-title":"Carbon Energy"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1016\/j.apcatb.2010.08.029","article-title":"ZnO-Based Visible-Light Photocatalyst: Band-Gap Engineering and Multi-Electron Reduction by Co-Catalyst","volume":"100","author":"Anandan","year":"2010","journal-title":"Appl. Catal. B Environ."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"922","DOI":"10.1515\/ntrev-2020-0072","article-title":"Laboratory Experiment on the Nano-TiO2 Photocatalytic Degradation Effect of Road Surface Oil Pollution","volume":"9","author":"Wang","year":"2020","journal-title":"Nanotechnol. Revis."},{"key":"ref_60","first-page":"106","article-title":"A Review on the Factors Affecting the Photocatalytic Degradation of Hazardous Materials","volume":"1","author":"Kumar","year":"2017","journal-title":"Mater. Sci. Eng. Int. J."},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Belver, C., Bedia, J., G\u00f3mez-Avil\u00e9s, A., Pe\u00f1as-Garz\u00f3n, M., and Rodriguez, J.J. (2019). Semiconductor Photocatalysis for Water Purification. Nanoscale Materials in Water Purification, Elsevier.","DOI":"10.1016\/B978-0-12-813926-4.00028-8"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1007\/s41204-021-00135-y","article-title":"An Overview on Cellulose-Supported Semiconductor Photocatalysts for Water Purification","volume":"6","author":"Rana","year":"2021","journal-title":"Nanotechnol. Environ. Eng."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"7450","DOI":"10.1021\/acsami.1c22035","article-title":"In-Depth Study of Heavy Metal Removal by an Etidronic Acid-Functionalized Layered Double Hydroxide","volume":"14","author":"Zhu","year":"2022","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"012006","DOI":"10.1088\/1757-899X\/957\/1\/012006","article-title":"Photocatalytic Behaviour of TiO2-Geopolymer Paste under Sunlight","volume":"957","author":"Zailan","year":"2020","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"1641","DOI":"10.1016\/j.jclepro.2018.07.123","article-title":"Sustainable Concrete: Building a Greener Future","volume":"198","author":"Assi","year":"2018","journal-title":"J. Clean. Prod."},{"key":"ref_66","doi-asserted-by":"crossref","unstructured":"Yang, X., Liu, Y., Yan, C., Peng, R., and Wang, H. (2019). Geopolymer-TiO2 Nanocomposites for Photocsatalysis: Synthesis by One-Step Adding Treatment versus Two-Step Acidification Calcination. Minerals, 9.","DOI":"10.3390\/min9110658"},{"key":"ref_67","first-page":"23","article-title":"Degradation of Methylene Blue via Geopolymer Composite Photocatalyst","volume":"21","author":"Jdm","year":"2013","journal-title":"Solid State Sci. Technol."},{"key":"ref_68","first-page":"806","article-title":"Index Terms: Application of Titania in Geopolymer Concrete","volume":"9","author":"Maniarasan","year":"2020","journal-title":"Int. J. Sci. Technol. Res."},{"key":"ref_69","first-page":"131","article-title":"Development of a Construction Material for Indoor and Outdoor, Metakaolinite-Based Geopolymer, with Environmental Properties","volume":"9","author":"Rico","year":"2019","journal-title":"J. Mater. Sci. Eng. A"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"167","DOI":"10.13005\/ojc\/350118","article-title":"Nanocrystalline Titania Coated Metakaolin and Rice Hull Ash Based Geopolymer Spheres for Photocatalytic Degradation of Dyes in Wastewater","volume":"35","author":"Shimizu","year":"2019","journal-title":"Orient. J. Chem."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"2408","DOI":"10.1016\/j.cej.2017.09.153","article-title":"TiO2 Photocatalyst for Removal of Volatile Organic Compounds in Gas Phase\u2014A Review","volume":"334","author":"Shayegan","year":"2018","journal-title":"Chem. Eng. J."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"1050","DOI":"10.3762\/bjnano.9.98","article-title":"Review on Nanoparticles and Nanostructured Materials: History, Sources, Toxicity and Regulations","volume":"9","author":"Jeevanandam","year":"2018","journal-title":"Beilstein J. Nanotechnol."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.compositesa.2018.05.019","article-title":"Multifunctional Cementitious Composites Modified with Nano Titanium Dioxide: A Review","volume":"111","author":"Li","year":"2018","journal-title":"Compos. Part A: Appl. Sci. Manuf."},{"key":"ref_74","doi-asserted-by":"crossref","unstructured":"Ningthoujam, R., Singh, Y.D., Babu, P.J., Tirkey, A., Pradhan, S., and Sarma, M. (2022). Nanocatalyst in Remediating Environmental Pollutants. Chem. Phys. Impact, 4.","DOI":"10.1016\/j.chphi.2022.100064"},{"key":"ref_75","doi-asserted-by":"crossref","unstructured":"Hamidi, F., and Aslani, F. (2019). TiO2-Based Photocatalytic Cementitious Composites: Materials, Properties, Influential Parameters, and Assessment Techniques. Nanomaterials, 9.","DOI":"10.3390\/nano9101444"},{"key":"ref_76","doi-asserted-by":"crossref","first-page":"95","DOI":"10.2147\/NSA.S19419","article-title":"Titanium Dioxide and Zinc Oxide Nanoparticles in Sunscreens: Focus on Their Safety and Effectiveness","volume":"4","author":"Smijs","year":"2011","journal-title":"Nanotechnol. Sci. Appl."},{"key":"ref_77","first-page":"391","article-title":"Eco-Sustainable Pervious Concrete Using Titanium Dioxide","volume":"3","author":"Ketan","year":"2015","journal-title":"Int. J. Sci. Res.Dev."},{"key":"ref_78","doi-asserted-by":"crossref","first-page":"892","DOI":"10.1016\/j.conbuildmat.2015.10.149","article-title":"Influence of Nanoparticles on Fluidity and Mechanical Properties of Cement Mortar","volume":"101","author":"Liu","year":"2015","journal-title":"Constr. Build. Mater."},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"020187","DOI":"10.1063\/5.0044215","article-title":"Geopolymer Coating Paste on Concrete for Photocatalytic Performance","volume":"2339","author":"Jamaludin","year":"2021","journal-title":"AIP Conf. Proc."},{"key":"ref_80","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.apsusc.2019.01.261","article-title":"Hydrophilic Surface Modification of TiO2 to Produce a Highly Sustainable Photocatalyst for Outdoor Air Purification","volume":"479","author":"Cha","year":"2019","journal-title":"Appl. Surf. Sci."},{"key":"ref_81","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s42452-021-04281-5","article-title":"Synthesis of TiO2 Nanoparticles by Chemical and Green Synthesis Methods and Their Multifaceted Properties","volume":"3","author":"Aravind","year":"2021","journal-title":"SN Appl. Sci."},{"key":"ref_82","doi-asserted-by":"crossref","first-page":"1425","DOI":"10.1007\/s10904-019-01248-3","article-title":"Green Synthesis of TiO2 Nanoparticle Using Cinnamon Powder Extract and the Study of Optical Properties","volume":"30","author":"Nabi","year":"2020","journal-title":"J. Inorg. Organomet. Polym. Mater."},{"key":"ref_83","doi-asserted-by":"crossref","first-page":"505","DOI":"10.1007\/s42452-019-0522-4","article-title":"Effects of Different Surfactants on Morphology of TiO2 and Zr-Doped TiO2 Nanoparticles and Their Applications in MB Dye Photocatalytic Degradation","volume":"1","author":"Honarmand","year":"2019","journal-title":"SN Appl. Sci."},{"key":"ref_84","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1016\/j.apcatb.2004.06.019","article-title":"Photoactivity of Anatase\u2013Rutile TiO2 Nanocrystalline Mixtures Obtained by Heat Treatment of Homogeneously Precipitated Anatase","volume":"58","author":"Bakardjieva","year":"2005","journal-title":"Appl. Catal. B Environ."},{"key":"ref_85","doi-asserted-by":"crossref","first-page":"1605","DOI":"10.1081\/ESE-200060664","article-title":"Immobilization of TiO2 Nanopowder on Glass Beads for the Photocatalytic Decolorization of an Azo Dye C.I. Direct Red 23","volume":"40","author":"Daneshvar","year":"2005","journal-title":"J. Environ. Sci. Health Part A"},{"key":"ref_86","doi-asserted-by":"crossref","first-page":"1437","DOI":"10.1016\/j.rinp.2017.03.023","article-title":"Structural, Electrical and Optical Properties of Multilayer TiO2 Thin Films Deposited by Sol\u2013Gel Spin Coating","volume":"7","author":"Khan","year":"2017","journal-title":"Results Phys."},{"key":"ref_87","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1016\/j.buildenv.2015.08.027","article-title":"Photocatalytic Activities of Titanium Dioxide Incorporated Architectural Mortars: Effects of Weathering and Activation Light","volume":"94","author":"Guo","year":"2015","journal-title":"Build. Environ."},{"key":"ref_88","doi-asserted-by":"crossref","first-page":"853","DOI":"10.1016\/j.conbuildmat.2018.02.103","article-title":"Photocatalytic Activity of ZnO and TiO2 \u2018Nanoparticles\u2019 for Use in Cement Mixes","volume":"167","author":"Loh","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_89","doi-asserted-by":"crossref","unstructured":"Wu, X. (2022). Applications of Titanium Dioxide Materials. Titanium Dioxide\u2014Advances and Applications, IntechOpen.","DOI":"10.5772\/intechopen.99255"},{"key":"ref_90","doi-asserted-by":"crossref","first-page":"020100","DOI":"10.1063\/1.5080913","article-title":"The Synergetic Compressive Strength and Microstructure of Fly Ash and Metakaolin Blend Geopolymer Pastes","volume":"2045","author":"Zulkifly","year":"2018","journal-title":"AIP Conf. Proc."},{"key":"ref_91","doi-asserted-by":"crossref","first-page":"178","DOI":"10.1016\/j.matlet.2019.02.065","article-title":"Enhancement of Photocatalytic Activity of Self-Cleaning Cement","volume":"244","author":"Ratan","year":"2019","journal-title":"Mater. Lett."},{"key":"ref_92","doi-asserted-by":"crossref","first-page":"1915","DOI":"10.1016\/j.matpr.2022.05.161","article-title":"Effect of Nano TiO2 on Mechanical Properties and Microstructure of Concrete","volume":"65","author":"Pathak","year":"2022","journal-title":"Mater. Today Proc."},{"key":"ref_93","doi-asserted-by":"crossref","unstructured":"Sun, Y., Chen, L., Bao, Y., Zhang, Y., Wang, J., Fu, M., Wu, J., and Ye, D. (2016). The Applications of Morphology Controlled ZnO in Catalysis. Catalysts, 6.","DOI":"10.3390\/catal6120188"},{"key":"ref_94","first-page":"390","article-title":"Zinc Oxide Nanoparticle Synthesize by Green Approach","volume":"2","author":"Fariza","year":"2021","journal-title":"Res. Prog. Mech. Manuf. Eng."},{"key":"ref_95","doi-asserted-by":"crossref","first-page":"11794","DOI":"10.1039\/C7TA00412E","article-title":"Mechanism of Zinc Oxide Retardation in Alkali-Activated Materials: An in-Situ X-Ray Pair Distribution Function Investigation","volume":"5","author":"Garg","year":"2017","journal-title":"J. Mater. Chem. A"},{"key":"ref_96","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jallcom.2014.11.043","article-title":"Microstructure, Characterizations, Functionality and Compressive Strength of Cement-Based Materials Using Zinc Oxide Nanoparticles as an Additive","volume":"630","author":"Nochaiya","year":"2015","journal-title":"J. Alloys Compd."},{"key":"ref_97","doi-asserted-by":"crossref","unstructured":"McKeen, L.W. (2016). The Components of Paint. Fluorinated Coatings and Finishes Handbook, Elsevier.","DOI":"10.1016\/B978-0-323-37126-1.00003-5"},{"key":"ref_98","doi-asserted-by":"crossref","first-page":"012081","DOI":"10.1088\/1757-899X\/708\/1\/012081","article-title":"Study of the Efficiency of Epoxy Coating Protection of Concrete Surfaces from Sulfuric Acid Corrosion","volume":"708","author":"Goncharenko","year":"2019","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_99","doi-asserted-by":"crossref","first-page":"120922","DOI":"10.1016\/j.jclepro.2020.120922","article-title":"TA\/Fe (III) Anti-Chloride Coating to Protect Concrete","volume":"259","author":"Xiao","year":"2020","journal-title":"J. Clean. Prod."},{"key":"ref_100","unstructured":"Papakonstantinou, C.G., and Balaguru, P.N. (2007, January 3\u20137). Geopolymer protective coatings for concrete. Proceedings of the SAMPE \u201807: M and P\u2014From Coast to Coast and Around the World, Conference Proceedings, International SAMPE Symposium and Exhibition, Baltimore, MD, USA."},{"key":"ref_101","doi-asserted-by":"crossref","first-page":"862","DOI":"10.1080\/03602559.2015.1103269","article-title":"Insight on the Chemistry of Epoxy and Its Curing for Coating Applications: A Detailed Investigation and Future Perspectives","volume":"55","author":"Pradhan","year":"2016","journal-title":"Polym. Plast. Technol. Eng."},{"key":"ref_102","doi-asserted-by":"crossref","first-page":"05011","DOI":"10.1051\/matecconf\/201816305011","article-title":"Application of Acrylic-Based Coatings for Concrete Protection","volume":"163","author":"Kozak","year":"2018","journal-title":"MATEC Web Conf."},{"key":"ref_103","first-page":"283","article-title":"Advances in geopolymer materials: A comprehensive review","volume":"8","author":"Cong","year":"2021","journal-title":"J. Traffic Transp. Eng. (Engl. Ed.)"},{"key":"ref_104","doi-asserted-by":"crossref","unstructured":"Jiang, C., Wang, A., Bao, X., Chen, Z., Ni, T., and Wang, Z. (2020). Protective Geopolymer Coatings Containing Multi-Componential Precursors: Preparation and Basic Properties Characterization. Materials, 13.","DOI":"10.3390\/ma13163448"},{"key":"ref_105","doi-asserted-by":"crossref","first-page":"991","DOI":"10.1007\/s11998-019-00310-6","article-title":"Metakaolin-Based Geopolymer Coatings on Metals by Airbrush Spray Deposition","volume":"17","author":"Mao","year":"2020","journal-title":"J. Coat. Technol. Res."},{"key":"ref_106","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1016\/j.clay.2016.10.029","article-title":"A Novel Geopolymer Application: Coatings to Protect Reinforced Concrete against Corrosion","volume":"135","year":"2017","journal-title":"Appl. Clay Sci."},{"key":"ref_107","first-page":"294","article-title":"Performance and Effectiveness of Concrete Coatings-A State of Art Review","volume":"5","author":"Sarumathi","year":"2016","journal-title":"Int. J. Sci. Res."},{"key":"ref_108","doi-asserted-by":"crossref","unstructured":"Rosales, A., and Esquivel, K. (2020). SiO2@TiO2 Composite Synthesis, and Its Hydrophobic Applications: A Review. Catalysts, 10.","DOI":"10.3390\/catal10020171"},{"key":"ref_109","doi-asserted-by":"crossref","unstructured":"Guzm\u00e1n-Aponte, L.A., de Guti\u00e9rrez, R.M., and Maury-Ram\u00edrez, A. (2017). Metakaolin-Based Geopolymer with Added TiO2 Particles: Physicomechanical Characteristics. Coatings, 7.","DOI":"10.3390\/coatings7120233"},{"key":"ref_110","first-page":"1","article-title":"Preparation, Characterization, and Application of Metakaolin-Based Geopolymer for Removal of Methylene Blue from Aqueous Solution","volume":"2019","author":"Alehyen","year":"2019","journal-title":"J. Chem."},{"key":"ref_111","doi-asserted-by":"crossref","first-page":"1590","DOI":"10.1016\/j.cemconres.2007.08.018","article-title":"The Role of Inorganic Polymer Technology in the Development of \u2018Green Concrete","volume":"37","author":"Duxson","year":"2007","journal-title":"\u2019 Cem. Concr. Res."},{"key":"ref_112","doi-asserted-by":"crossref","first-page":"020063","DOI":"10.1063\/1.5003546","article-title":"Durability of Metakaolin Geopolymers with Various Sodium Silicate\/Sodium Hydroxide Ratios against Seawater Exposure","volume":"1887","author":"Jaya","year":"2017","journal-title":"AIP Conf. Proc."},{"key":"ref_113","doi-asserted-by":"crossref","unstructured":"Guzm\u00e1n-Carrillo, H.R., Manzano-Ram\u00edrez, A., Garcia Lodeiro, I., and Fern\u00e1ndez-Jim\u00e9nez, A. (2020). ZnO Nanoparticles for Photocatalytic Application in Alkali-Activated Materials. Molecules, 25.","DOI":"10.3390\/molecules25235519"},{"key":"ref_114","doi-asserted-by":"crossref","first-page":"012011","DOI":"10.1088\/1757-899X\/458\/1\/012011","article-title":"Effects of Na: Al and Water: Solid Ratios on the Mechanical Properties of Fly Ash Based Geopolymer","volume":"458","author":"Yaakob","year":"2018","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_115","doi-asserted-by":"crossref","first-page":"106194","DOI":"10.1016\/j.cemconres.2020.106194","article-title":"The Role of Zinc in Metakaolin-Based Geopolymers","volume":"136","author":"Wang","year":"2020","journal-title":"Cem. Concr. Res."},{"key":"ref_116","doi-asserted-by":"crossref","unstructured":"Strini, A., Roviello, G., Ricciotti, L., Ferone, C., Messina, F., Schiavi, L., Corsaro, D., and Cioffi, R. (2016). TiO2-Based Photocatalytic Geopolymers for Nitric Oxide Degradation. Materials, 9.","DOI":"10.3390\/ma9070513"},{"key":"ref_117","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1155\/2020\/9498349","article-title":"Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer","volume":"2020","author":"Saufi","year":"2020","journal-title":"Int. J. Chem. Eng."},{"key":"ref_118","doi-asserted-by":"crossref","first-page":"125120","DOI":"10.1016\/j.jclepro.2020.125120","article-title":"Red Mud- and Metakaolin-Based Geopolymers for Adsorption and Photocatalytic Degradation of Methylene Blue: Towards Self-Cleaning Construction Materials","volume":"288","author":"Uzun","year":"2021","journal-title":"J. Clean. Prod."},{"key":"ref_119","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1016\/j.partic.2012.10.007","article-title":"Fly Ash-Based Geopolymer as a Novel Photocatalyst for Degradation of Dye from Wastewater","volume":"11","author":"Zhang","year":"2013","journal-title":"Particuology"},{"key":"ref_120","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1016\/j.conbuildmat.2017.06.097","article-title":"Geopolymer-supported photocatalytic TiO2 film: Preparation and characterization","volume":"151","author":"Chen","year":"2017","journal-title":"Constr. Build. 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