{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T11:43:33Z","timestamp":1783079013872,"version":"3.54.6"},"reference-count":38,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,11,22]],"date-time":"2022-11-22T00:00:00Z","timestamp":1669075200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"\u201cKorea Institute of Civil Engineering and Building Technology\u201d (KICT), Republic of Korea","award":["20220145-001"],"award-info":[{"award-number":["20220145-001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>In the last decades, the removal of benzene, toluene, ethylbenzene, and xylene (BTEX) has been considered a major environmental crisis. In this study, two novel nanocomposite materials (Fe2O3\/SiO2 and Fe2O3-Mn2O3\/SiO2) that have regeneration ability by UV irradiation have been fabricated to remove BTEX at ambient temperature. This research revealed that both nanocomposites could remove more than 85% of the BTEX in the first cycle. The adsorption capacities followed the order of ethylbenzene &gt; m-xylene &gt; toluene &gt; benzene as in the molecular weight order. The reusability test using UV irradiation showed that the performance of Fe2O3\/SiO2 decreased drastically after the fifth cycle for benzene. On the other hand, when Mn is located in the nanocomposite structure, Fe2O3-Mn2O3\/SiO2 could maintain its adsorption performance with more than 80% removal efficiency for all the BTEX for ten consecutive cycles. The difference in the reusability of the two nanocomposites is that the electron energy (from the valence band to the conduction band) for BTEX decomposition is changed due to the presence of manganese. This study provides a promising approach for designing an economical reusable nanomaterial, which can be used for VOC-contaminated indoor air.<\/jats:p>","DOI":"10.3390\/nano12234113","type":"journal-article","created":{"date-parts":[[2022,11,22]],"date-time":"2022-11-22T08:27:29Z","timestamp":1669105649000},"page":"4113","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Sustainable Removal of BTEX Gas Using Regenerated Metal Containing SiO2"],"prefix":"10.3390","volume":"12","author":[{"given":"Soyoung","family":"Beak","sequence":"first","affiliation":[{"name":"Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 10223, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7509-668X","authenticated-orcid":false,"given":"Yasaman","family":"Ghaffari","sequence":"additional","affiliation":[{"name":"Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 10223, Republic of Korea"},{"name":"Civil and Environmental Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8668-5036","authenticated-orcid":false,"given":"Suho","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Civil & Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eun Ji","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 10223, Republic of Korea"},{"name":"Civil and Environmental Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kwang Soo","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 10223, Republic of Korea"},{"name":"Civil and Environmental Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiyeol","family":"Bae","sequence":"additional","affiliation":[{"name":"Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 10223, Republic of Korea"},{"name":"Civil and Environmental Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"137405","DOI":"10.1016\/j.scitotenv.2020.137405","article-title":"Recent advances in volatile organic compounds abatement by catalysis and catalytic hybrid processes: A critical review","volume":"719","author":"Lee","year":"2020","journal-title":"Sci. Total Environ."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"398","DOI":"10.1016\/j.biotechadv.2008.03.005","article-title":"Biological treatment of indoor air for VOC removal: Potential and challenges","volume":"26","author":"Guieysse","year":"2008","journal-title":"Biotechnol. Adv."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.ibiod.2016.04.019","article-title":"Study of sulfuric acid treatment of activated carbon used to enhance mixed VOC removal","volume":"113","author":"Pak","year":"2016","journal-title":"Int. Biodeterior. Biodegrad."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1128","DOI":"10.1016\/j.cej.2019.03.232","article-title":"Abatement of various types of VOCs by adsorption\/catalytic oxidation: A review","volume":"370","author":"Yang","year":"2019","journal-title":"Chem. Eng. J."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"800","DOI":"10.1016\/S1872-2067(15)61073-7","article-title":"Adsorptive and catalytic properties in the removal of volatile organic compounds over zeolite-based materials","volume":"37","author":"Zhang","year":"2016","journal-title":"Chin. J. Catal."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"134825","DOI":"10.1016\/j.cej.2022.134825","article-title":"BTEX in the environment: An update on sources, fate, distribution, pretreatment, analysis, and removal techniques","volume":"435","author":"Yu","year":"2022","journal-title":"Chem. Eng. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1417","DOI":"10.1080\/10643389.2011.647760","article-title":"Removal of BTEX compounds from waste gases; destruction and recovery techniques","volume":"43","year":"2013","journal-title":"Crit. Rev. Environ. Sci. Technol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1005","DOI":"10.1016\/j.molliq.2018.10.105","article-title":"A review on adsorptive removal of oil pollutants (BTEX) from wastewater using carbon nanotubes","volume":"277","author":"Anjum","year":"2019","journal-title":"J. Mol. Liq."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"13868","DOI":"10.1039\/C4TA01940G","article-title":"A porous Cd (II)-MOF-coated quartz fiber for solid-phase microextraction of BTEX","volume":"2","author":"Li","year":"2014","journal-title":"J. Mater. Chem. A"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"125566","DOI":"10.1016\/j.cej.2020.125566","article-title":"Novel thiol-functionalized covalent organic framework as adsorbent for simultaneous removal of BTEX and mercury (II) from water","volume":"398","author":"Li","year":"2020","journal-title":"Chem. Eng. J."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1007\/s00604-019-3560-0","article-title":"Ordered macro\/micro-porous metal-organic framework of type ZIF-8 in a steel fiber as a sorbent for solid-phase microextraction of BTEX","volume":"186","author":"Maya","year":"2019","journal-title":"Microchim. Acta"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"632","DOI":"10.1016\/j.spmi.2012.06.026","article-title":"Photocatalytic degradation of BTEX using W-doped TiO2 immobilized on fiberglass cloth under visible light","volume":"52","author":"Sangkhun","year":"2012","journal-title":"Superlattices Microstruct."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"751","DOI":"10.1002\/eem2.12256","article-title":"Perovskite oxides in catalytic combustion of volatile organic compounds: Recent advances and future prospects","volume":"5","author":"Yang","year":"2022","journal-title":"Energy Environ. Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"713","DOI":"10.1016\/j.jece.2013.07.005","article-title":"Adsorption of volatile organic compounds by metal-organic frameworks MOF-177","volume":"1","author":"Yang","year":"2013","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"351","DOI":"10.1016\/j.jhazmat.2017.07.019","article-title":"Synergistic effect of UV pretreated Fe-ZSM-5 catalysts for heterogeneous catalytic complete oxidation of VOC: A technology development for sustainable use","volume":"340","author":"Aziz","year":"2017","journal-title":"J. Hazard. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1007\/s11270-017-3299-3","article-title":"Evaluation of Activated Carbon-Coated Electrode in Electrostatic Precipitator and Its Regeneration for Volatile Organic Compounds Removal","volume":"228","author":"Jun","year":"2017","journal-title":"Water Air Soil Pollut."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"119849","DOI":"10.1016\/j.fuel.2020.119849","article-title":"Performance of transition metal (Cu, Fe and Co) modified SCR catalysts for simultaneous removal of NO and volatile organic compounds (VOCs) from coal-fired power plant flue gas","volume":"289","author":"Chen","year":"2021","journal-title":"Fuel"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"3511","DOI":"10.1021\/acs.iecr.9b06062","article-title":"Functionalized Ordered Mesoporous Silica by Vinyltriethoxysilane for the Removal of Volatile Organic Compounds through Adsorption\/Desorption Process","volume":"59","author":"Li","year":"2020","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"145697","DOI":"10.1016\/j.apsusc.2020.145697","article-title":"Electrospun SiO2 aerogel\/polyacrylonitrile composited nanofibers with enhanced adsorption performance of volatile organic compounds","volume":"512","author":"Yu","year":"2020","journal-title":"Appl. Surf. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"120259","DOI":"10.1016\/j.seppur.2021.120259","article-title":"One-step fabrication of novel ultra porous Mn2O3-Fe2O3 @ SiO2: A versatile material for removal of organic pollutants from industrial wastewater at neutral pH","volume":"285","author":"Ghaffari","year":"2022","journal-title":"Sep. Purif. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5538","DOI":"10.1007\/s11356-015-5768-9","article-title":"Utilization of rice husk silica as adsorbent for BTEX passive air sampler under high humidity condition","volume":"23","author":"Areerob","year":"2016","journal-title":"Environ. Sci. Pollut. Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/j.jhazmat.2017.04.073","article-title":"Equilibrium, kinetic and thermodynamic studies for adsorption of BTEX onto Ordered Mesoporous Carbon (OMC)","volume":"336","author":"Konggidinata","year":"2017","journal-title":"J. Hazard. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1016\/j.buildenv.2009.07.019","article-title":"The effect of activated carbon adsorption on the photocatalytic removal of formaldehyde","volume":"45","author":"Lu","year":"2010","journal-title":"Build. Environ."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"3982","DOI":"10.1166\/jnn.2018.15216","article-title":"MnO2\/MWCNTs nanocomposites as highly efficient catalyst for indoor formaldehyde removal","volume":"18","author":"Miao","year":"2018","journal-title":"J. Nanosci. Nanotechnol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"7303","DOI":"10.1021\/nn1024219","article-title":"TiO2-graphene nanocomposites for gas-phase photocatalytic degradation of volatile aromatic pollutant: Is TiO2-graphene truly different from other TiO2-carbon composite materials?","volume":"4","author":"Zhang","year":"2010","journal-title":"ACS Nano"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"680","DOI":"10.1016\/j.jhazmat.2014.09.067","article-title":"Photocatalysis of sub-ppm limonene over multiwalled carbon nanotubes\/titania composite nanofiber under visible-light irradiation","volume":"283","author":"Jo","year":"2015","journal-title":"J. Hazard. Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"37796","DOI":"10.1039\/C4RA05985A","article-title":"Plasma-catalytic removal of a low concentration of acetone in humid conditions","volume":"4","author":"Zhu","year":"2014","journal-title":"RSC Adv."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"13252","DOI":"10.1021\/jp3034819","article-title":"New Operando IR Technique to Study the Photocatalytic Activity and Selectivity of TiO2 Nanotubes in Air Purification: Influence of Temperature, UV Intensity, and VOC Concentration","volume":"116","author":"Kus","year":"2012","journal-title":"J. Phys. Chem. C"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Ghaffari, Y., Beak, S., Bae, J., Saifuddin, M., and Kim, K.S. (2022). Effect of UV Irradiation on the Structural Variation of Metal Oxide-Silica Nanocomposites for Enhanced Removal of Erythromycin at Neutral pH. Catalysts, 12.","DOI":"10.3390\/catal12040424"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"121274","DOI":"10.1016\/j.jhazmat.2019.121274","article-title":"Structural variations and generation of binding sites in Fe-loaded ZSM-5 and silica under the effect of UV-irradiation and their role in enhanced BTEX abatement from gas streams","volume":"384","author":"Kim","year":"2020","journal-title":"J. Hazard. Mater."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1016\/S0022-3093(96)00611-4","article-title":"29Si MAS NMR, XRD and FESEM studies of rice husk silica for the synthesis of zeolites","volume":"211","author":"Hamdan","year":"1997","journal-title":"J. Non-Cryst. Solids"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Baek, S., Ghaffari, Y., and Bae, J. (2022). Synthesis of Fe2O3\/Mn2O3 Nanocomposites and Impregnated Porous Silicates for Dye Removal: Insights into Treatment Mechanisms. Catalysts, 12.","DOI":"10.3390\/catal12091045"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"119957","DOI":"10.1016\/j.carbpol.2022.119957","article-title":"In-situ structuring a robust cellulose hydrogel with ZnO\/SiO2 heterojunctions for efficient photocatalytic degradation","volume":"296","author":"Ren","year":"2022","journal-title":"Carbohydr. Polym."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.cattod.2020.02.026","article-title":"Comprehensive understanding of SiO2-promoted Fe Fischer-Tropsch synthesis catalysts: Fe-SiO2 interaction and beyond","volume":"368","author":"Zhang","year":"2021","journal-title":"Catal. Today"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2220","DOI":"10.1080\/09593330.2019.1697376","article-title":"Heterogeneous photo-Fenton oxidation of lignin of rice husk alkaline hydrolysates using Fe-impregnated silica catalysts","volume":"42","author":"Arefieva","year":"2021","journal-title":"Environ. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1007\/s12034-018-1650-y","article-title":"Effect of CTAB coating on structural, magnetic and peroxidase mimic activity of ferric oxide nanoparticles","volume":"41","author":"Garg","year":"2018","journal-title":"Bull. Mater. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"6351","DOI":"10.1039\/c2nr31859h","article-title":"In situ loading of ultra-small Cu2O particles on TiO2 nanosheets to enhance the visible-light photoactivity","volume":"4","author":"Liu","year":"2012","journal-title":"Nanoscale"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"605","DOI":"10.1007\/s10971-021-05532-y","article-title":"Photocatalytic degradation of volatile organic compounds using nanocomposite of P-type and N-type transition metal semiconductors","volume":"98","author":"Degefu","year":"2021","journal-title":"J. Sol-Gel Sci. Technol."}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/12\/23\/4113\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:24:16Z","timestamp":1760145856000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/12\/23\/4113"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,11,22]]},"references-count":38,"journal-issue":{"issue":"23","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["nano12234113"],"URL":"https:\/\/doi.org\/10.3390\/nano12234113","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,11,22]]}}}