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Article: Efficient photocatalytic oxidation of gaseous toluene over F-doped TiO2 in a wet scrubbing process

TitleEfficient photocatalytic oxidation of gaseous toluene over F-doped TiO2 in a wet scrubbing process
Authors
KeywordsVOCs degradation
Wet scrubbing process
Photocatalytic oxidation
F-doped TiO2
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej
Citation
Chemical Engineering Journal, 2020, v. 386, p. article no. 121025 How to Cite?
AbstractThe application of photocatalytic oxidation (PCO) of volatile organic compounds (VOCs) is strongly limited by catalyst deactivation, low mineralization ability and mass-transfer in gas-solid phase. Wet-scrubbing coupled with PCO (WPCO) provides a novel and efficient method for VOCs degradation. Fluorine-doped TiO2 (F-TiO2) photocatalyst was prepared and applied in this coupled process for toluene degradation. Toluene removal efficiency reached 80% over F-TiO2, while it was only 25% over TiO2 in the WPCO process. As for gas-solid PCO process, F-TiO2 had a low toluene removal efficiency of 10%. Furthermore, the mineralization capability of WPCO process over F-TiO2 also remarkably increased, achieving about 92 ppmv CO2 generated from toluene oxidation. Compared with TiO2, the surface fluorinated TiO2 significantly enhanced toluene degradation since it generated mobile hydroxyl radical (radical dotOH) in the WPCO process. The F/Ti molar ratio (RF) greatly affected photocatalytic activity towards toluene degradation, and the F-TiO2 with RF at 1 obtained the best performance. The photocatalytic activity of F-TiO2 had good stability and remained highly efficient after four runs.
Persistent Identifierhttp://hdl.handle.net/10722/300601
ISSN
2023 Impact Factor: 13.3
2023 SCImago Journal Rankings: 2.852
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorXie, R-
dc.contributor.authorLei, D-
dc.contributor.authorZhan, Y-
dc.contributor.authorLiu, B-
dc.contributor.authorTsang, CHA-
dc.contributor.authorZeng, Y-
dc.contributor.authorLi, K-
dc.contributor.authorLeung, DYC-
dc.contributor.authorHuang, H-
dc.date.accessioned2021-06-18T14:54:20Z-
dc.date.available2021-06-18T14:54:20Z-
dc.date.issued2020-
dc.identifier.citationChemical Engineering Journal, 2020, v. 386, p. article no. 121025-
dc.identifier.issn1385-8947-
dc.identifier.urihttp://hdl.handle.net/10722/300601-
dc.description.abstractThe application of photocatalytic oxidation (PCO) of volatile organic compounds (VOCs) is strongly limited by catalyst deactivation, low mineralization ability and mass-transfer in gas-solid phase. Wet-scrubbing coupled with PCO (WPCO) provides a novel and efficient method for VOCs degradation. Fluorine-doped TiO2 (F-TiO2) photocatalyst was prepared and applied in this coupled process for toluene degradation. Toluene removal efficiency reached 80% over F-TiO2, while it was only 25% over TiO2 in the WPCO process. As for gas-solid PCO process, F-TiO2 had a low toluene removal efficiency of 10%. Furthermore, the mineralization capability of WPCO process over F-TiO2 also remarkably increased, achieving about 92 ppmv CO2 generated from toluene oxidation. Compared with TiO2, the surface fluorinated TiO2 significantly enhanced toluene degradation since it generated mobile hydroxyl radical (radical dotOH) in the WPCO process. The F/Ti molar ratio (RF) greatly affected photocatalytic activity towards toluene degradation, and the F-TiO2 with RF at 1 obtained the best performance. The photocatalytic activity of F-TiO2 had good stability and remained highly efficient after four runs.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej-
dc.relation.ispartofChemical Engineering Journal-
dc.subjectVOCs degradation-
dc.subjectWet scrubbing process-
dc.subjectPhotocatalytic oxidation-
dc.subjectF-doped TiO2-
dc.titleEfficient photocatalytic oxidation of gaseous toluene over F-doped TiO2 in a wet scrubbing process-
dc.typeArticle-
dc.identifier.emailLeung, DYC: ycleung@hku.hk-
dc.identifier.authorityLeung, DYC=rp00149-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cej.2019.02.112-
dc.identifier.scopuseid_2-s2.0-85061735451-
dc.identifier.hkuros323029-
dc.identifier.volume386-
dc.identifier.spagearticle no. 121025-
dc.identifier.epagearticle no. 121025-
dc.identifier.isiWOS:000548606800001-
dc.publisher.placeNetherlands-

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