{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T14:58:29Z","timestamp":1783954709681,"version":"3.55.0"},"reference-count":29,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T00:00:00Z","timestamp":1744243200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004385","name":"Ghent University","doi-asserted-by":"publisher","award":["01G00319"],"award-info":[{"award-number":["01G00319"]}],"id":[{"id":"10.13039\/501100004385","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Long-time exposure to volatile organic compounds (VOCs) in the atmosphere can have negative health effects on humans and other living organisms. In order to purify ambient air, these VOCs can be degraded using photocatalysis. In this research, commercially available TiO2 nanoparticles were immobilized in a porous poly(vinylidene fluoride-co-hexa-fluoropropylene) (PVDF) polymer matrix, synthesized using the phase inversion method. The most used solvent for PVDF is N-methyl-2-pyrrolidone (NMP). However, this solvent is known to be harmful to humans and the environment, and there is a need to replace NMP with a more ecological \u2018green\u2019 solvent. Here, triethyl phosphate (TEP), methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (Rhodiasolv\u00ae PolarClean) and propylene carbonate (PC) were used to dissolve PVDF for the phase inversion synthesis of porous photocatalytically active PVDF\/TiO2 hybrid layers onto aluminium slides. The photocatalytic degradation under UV (365 nm) of gaseous ethanol in an argon\/oxygen (Ar\/O2) atmosphere shows that these solvents are suitable replacements for NMP, but optimization is required to improve the performance of the layers. Apart from changing the solvent for PVDF, the UV and photocatalysis stability of PVDF has been determined, as well as the repeatability of the photocatalytic reaction, to prove that PVDF is a suitable polymer for this application.<\/jats:p>","DOI":"10.3390\/molecules30081700","type":"journal-article","created":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T10:47:41Z","timestamp":1744282061000},"page":"1700","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Using Green Solvents for Phase Inversion of PVDF\/TiO2 Hybrid Coatings for Gas Phase Photocatalysis"],"prefix":"10.3390","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5908-9909","authenticated-orcid":false,"given":"Ewoud","family":"Cosaert","sequence":"first","affiliation":[{"name":"LumiLab, Department of Solid State Sciences, Ghent University, 9000 Ghent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6613-7806","authenticated-orcid":false,"given":"Hadis","family":"Mortazavi Milani","sequence":"additional","affiliation":[{"name":"LumiLab, Department of Solid State Sciences, Ghent University, 9000 Ghent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0713-9588","authenticated-orcid":false,"given":"Geraldine J.","family":"Heynderickx","sequence":"additional","affiliation":[{"name":"Laboratory for Chemical Technology, Ghent University, 9000 Ghent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3930-172X","authenticated-orcid":false,"given":"Dirk","family":"Poelman","sequence":"additional","affiliation":[{"name":"LumiLab, Department of Solid State Sciences, Ghent University, 9000 Ghent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/S0013-9351(03)00035-5","article-title":"Risk assessment of exposure to volatile organic compounds in different indoor environments","volume":"94","author":"Guo","year":"2004","journal-title":"Environ. Res."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Alford, K.L., and Kumar, N. (2021). Pulmonary Health Effects of Indoor Volatile Organic Compounds-A Meta-Analysis. Int. J. Environ. Res. Public Health, 18.","DOI":"10.3390\/ijerph18041578"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.watres.2011.10.032","article-title":"Recycled water: Potential health risks from volatile organic compounds and use of 1,4-dichlorobenzene as treatment performance indicator","volume":"46","author":"Rodriguez","year":"2012","journal-title":"Water Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.jbiotec.2023.12.013","article-title":"Volatile organic compounds: A threat to the environment and health hazards to living organisms\u2014A review","volume":"382","author":"Mangotra","year":"2024","journal-title":"J. Biotechnol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"738","DOI":"10.1002\/jccs.202000465","article-title":"Recent development and future prospects of TiO2 photocatalysis","volume":"68","author":"Peiris","year":"2021","journal-title":"J. Chin. Chem. Soc."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1016\/j.apcatb.2016.10.037","article-title":"Photocatalytic oxidation technology for indoor environment air purification: The state-of-the-art","volume":"203","author":"Mamaghani","year":"2017","journal-title":"Appl. Catal. B Environ."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"113588","DOI":"10.1016\/j.molliq.2020.113588","article-title":"Tuning of metal oxides photocatalytic performance using Ag nanoparticles integration","volume":"314","author":"Kumar","year":"2020","journal-title":"J. Mol. Liq."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2100317","DOI":"10.1002\/adma.202100317","article-title":"An Inorganic\/Organic S-Scheme Heterojunction H2-Production Photocatalyst and its Charge Transfer Mechanism","volume":"33","author":"Cheng","year":"2021","journal-title":"Adv. Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1007\/s10311-022-01503-z","article-title":"Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: A review","volume":"21","author":"Arun","year":"2023","journal-title":"Environ. Chem. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Bono, N., Ponti, F., Punta, C., and Candiani, G. (2021). Effect of UV Irradiation and TiO2-Photocatalysis on Airborne Bacteria and Viruses: An Overview. Materials, 14.","DOI":"10.3390\/ma14051075"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1016\/j.surfrep.2008.10.001","article-title":"TiO2 photocatalysis and related surface phenomena","volume":"63","author":"Fujishima","year":"2008","journal-title":"Surf. Sci. Rep."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/j.jphotochemrev.2012.06.001","article-title":"TiO2 photocatalysis: Design and applications","volume":"13","author":"Nakata","year":"2012","journal-title":"J. Photochem. Photobiol. C Photochem. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2071","DOI":"10.1002\/adma.201204520","article-title":"Superhydrophobic and Superoleophilic PVDF Membranes for Effective Separation of Water-in-Oil Emulsions with High Flux","volume":"25","author":"Zhang","year":"2013","journal-title":"Adv. Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"16339","DOI":"10.1007\/s10853-021-06343-w","article-title":"Ag-functionalized Bi2W(Mo)O6\/PVDF membrane for photocatalytic water treatment","volume":"56","author":"Salimi","year":"2021","journal-title":"J. Mater. Sci."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Hwang, J.Y., Magnone, E., Lee, J.I., Zhuang, X., Shin, M.C., and Park, J.H. (2022). S- and N-Co-Doped TiO2-Coated Al2O3 Hollow Fiber Membrane for Photocatalytic Degradation of Gaseous Ammonia. Membranes, 12.","DOI":"10.3390\/membranes12111101"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Magnone, E., Hwang, J.Y., Shin, M.C., Zhuang, X., Lee, J.I., and Park, J.H. (2022). Al2O3-Based Hollow Fiber Membranes Functionalized by Nitrogen-Doped Titanium Dioxide for Photocatalytic Degradation of Ammonia Gas. Membranes, 12.","DOI":"10.3390\/membranes12070693"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.nefro.2021.05.003","article-title":"Health and environmental effects of the use of N-methyl-2-pyrrolidone as a solvent in the manufacture of hemodialysis membranes: A sustainable reflexion","volume":"42","author":"Tarrass","year":"2022","journal-title":"Nefrolog\u00eda"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1002\/sca.20000","article-title":"CASINO V2.42\u2014A Fast and Easy-to-use Modeling Tool for Scanning Electron Microscopy and Microanalysis Users","volume":"29","author":"Drouin","year":"2007","journal-title":"Scanning"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Cosaert, E., Wolfs, C., Lambert, S.D., Heynderickx, G.J., and Poelman, D. (2021). Deposition of Hybrid Photocatalytic Layers for Air Purification Using Commercial TiO2 Powders. Molecules, 26.","DOI":"10.3390\/molecules26216584"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"202","DOI":"10.1016\/j.memsci.2005.09.033","article-title":"The stability of polymeric membranes in a TiO2 photocatalysis process","volume":"275","author":"Chin","year":"2006","journal-title":"J. Membr. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"494","DOI":"10.1016\/j.porgcoat.2012.06.004","article-title":"Weathering resistance of opaque PVDF-acrylic coatings applied on wood substrates","volume":"75","author":"Landry","year":"2012","journal-title":"Prog. Org. Coatings"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"818","DOI":"10.1016\/j.polymertesting.2008.06.006","article-title":"Performance of electroactive poly(vinylidene fluoride) against UV radiation","volume":"27","author":"Botelho","year":"2008","journal-title":"Polym. Test."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2400594","DOI":"10.1002\/adsu.202400594","article-title":"Assessing the Stability and Photocatalytic Efficiency of a Biodegradable PLA-TiO2 Membrane for Air Purification","volume":"9","author":"Cosaert","year":"2025","journal-title":"Adv. Sustain. Syst."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Dallaev, R., Pisarenko, T., Sobola, D., Orudzhev, F., Ramazanov, S., and Tr\u010dka, T. (2022). Brief Review of PVDF Properties and Applications Potential. Polymers, 14.","DOI":"10.3390\/polym14224793"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"100112","DOI":"10.1016\/j.apsadv.2021.100112","article-title":"Systematic and collaborative approach to problem solving using X-ray photoelectron spectroscopy","volume":"5","author":"Fairley","year":"2021","journal-title":"Appl. Surf. Sci. Adv."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Eufinger, K., De Gryse, R., and Poelman, D. (2007). Effect of Deposition Conditions and Doping on the Structure, Optical Properties and Photocatalytic Activity of D.C. Magnetron Sputtered TiO2 Thin Films. [Ph.D. Thesis, Ghent University, Faculty of Sciences].","DOI":"10.1016\/j.apsusc.2007.07.009"},{"key":"ref_27","unstructured":"Wallace, W.E. (2014). Mass Spectrum (Electron Ionization)\u2014Ethanol, NIST Mass Spectrometry Data Center. Technical report."},{"key":"ref_28","unstructured":"Wallace, W.E. (2014). Mass Spectrum (Electron Ionization)\u2014Carbon Dioxide, NIST Mass Spectrometry Data Center. Technical report."},{"key":"ref_29","unstructured":"(2022). Solar Energy\u2014Reference Solar Spectral Irradiance at the Ground at Different Receiving Conditions\u2014Part 1: Direct Normal and Hemispherical Solar Irradiance for Air Mass 1,5 (Standard No. ISO 9845-1:2022). Technical report."}],"container-title":["Molecules"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1420-3049\/30\/8\/1700\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:12:21Z","timestamp":1760029941000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1420-3049\/30\/8\/1700"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,4,10]]},"references-count":29,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2025,4]]}},"alternative-id":["molecules30081700"],"URL":"https:\/\/doi.org\/10.3390\/molecules30081700","relation":{},"ISSN":["1420-3049"],"issn-type":[{"value":"1420-3049","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,4,10]]}}}