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Article: Study the photocatalytic mechanism of the novel Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst for the simultaneous removal of BPA and chromium(VI)
Title | Study the photocatalytic mechanism of the novel Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst for the simultaneous removal of BPA and chromium(VI) |
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Authors | |
Keywords | Photocatalytic mechanism Plasmonic photocatalyst Simultaneous removal |
Issue Date | 2019 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej |
Citation | Chemical Engineering Journal, 2019, v. 361, p. 1352-1362 How to Cite? |
Abstract | Herein, we demonstrate the successful construction of a novel flowerlike Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst for the photocatalytic oxidation of BPA and reduction of chromium(VI) simultaneously under visible light irradiation. Among these samples, 2mM-Ag/p-Ag2O/n-BiVO4 exhibits the highest photocatalytic performances. The photocatalytic reduction and oxidation efficiency can achieve 69.8 and 91.9%, respectively, after 100 min visible-light irradiation. The enhancement mechanism for the plasmonic photocatalyst is explored, which can be attributed to the enhanced absorbance in the visible light region, and the facilitated charge transfer and the suppressed recombination of electron-hole pairs in the Ag/p-Ag2O/n-BiVO4. The results of the electrochemical impedance spectroscopy, the fluorescence emission spectra and the time-resolved fluorescence emission decay spectra indicate the enhanced charge separation in the Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst. In addition, the free radical scavenging test shows that h+ and OH radicals play crucial roles in the photocatalytic oxidation reaction. The photogenerated electrons in the photocatalytic reduction process, are confirmed by the DMPO spin-trapping technology. Moreover, the band structures of various photocatalysts are revealed via the valence band XPS spectra and the Fermi level obtained by CASTEP code. |
Persistent Identifier | http://hdl.handle.net/10722/272254 |
ISSN | 2023 Impact Factor: 13.3 2023 SCImago Journal Rankings: 2.852 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhao, W | - |
dc.contributor.author | Zhang, J | - |
dc.contributor.author | Zhu, F | - |
dc.contributor.author | Mu, F | - |
dc.contributor.author | Zhang, L | - |
dc.contributor.author | Dai, B | - |
dc.contributor.author | Xu, J | - |
dc.contributor.author | Zhu, A | - |
dc.contributor.author | Sun, C | - |
dc.contributor.author | Leung, DYC | - |
dc.date.accessioned | 2019-07-20T10:38:41Z | - |
dc.date.available | 2019-07-20T10:38:41Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Chemical Engineering Journal, 2019, v. 361, p. 1352-1362 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/10722/272254 | - |
dc.description.abstract | Herein, we demonstrate the successful construction of a novel flowerlike Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst for the photocatalytic oxidation of BPA and reduction of chromium(VI) simultaneously under visible light irradiation. Among these samples, 2mM-Ag/p-Ag2O/n-BiVO4 exhibits the highest photocatalytic performances. The photocatalytic reduction and oxidation efficiency can achieve 69.8 and 91.9%, respectively, after 100 min visible-light irradiation. The enhancement mechanism for the plasmonic photocatalyst is explored, which can be attributed to the enhanced absorbance in the visible light region, and the facilitated charge transfer and the suppressed recombination of electron-hole pairs in the Ag/p-Ag2O/n-BiVO4. The results of the electrochemical impedance spectroscopy, the fluorescence emission spectra and the time-resolved fluorescence emission decay spectra indicate the enhanced charge separation in the Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst. In addition, the free radical scavenging test shows that h+ and OH radicals play crucial roles in the photocatalytic oxidation reaction. The photogenerated electrons in the photocatalytic reduction process, are confirmed by the DMPO spin-trapping technology. Moreover, the band structures of various photocatalysts are revealed via the valence band XPS spectra and the Fermi level obtained by CASTEP code. | - |
dc.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej | - |
dc.relation.ispartof | Chemical Engineering Journal | - |
dc.subject | Photocatalytic mechanism | - |
dc.subject | Plasmonic photocatalyst | - |
dc.subject | Simultaneous removal | - |
dc.title | Study the photocatalytic mechanism of the novel Ag/p-Ag2O/n-BiVO4 plasmonic photocatalyst for the simultaneous removal of BPA and chromium(VI) | - |
dc.type | Article | - |
dc.identifier.email | Zhao, W: zwljx@hku.hk | - |
dc.identifier.email | Leung, DYC: ycleung@hku.hk | - |
dc.identifier.authority | Leung, DYC=rp00149 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.cej.2018.12.181 | - |
dc.identifier.scopus | eid_2-s2.0-85059567253 | - |
dc.identifier.hkuros | 299092 | - |
dc.identifier.volume | 361 | - |
dc.identifier.spage | 1352 | - |
dc.identifier.epage | 1362 | - |
dc.identifier.isi | WOS:000457096400132 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.issnl | 1385-8947 | - |