Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)

Doping of Cr(6+) into BiVO(4) was examined in this study. A new absorption band with a 1.84 eV energy threshold appeared with Cr-doping. The theoretical band calculation has revealed that the new absorption is ascribed to the electron transition from the valence band to acceptor levels formed by emp...

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Autores principales: Okuno, Kazuya, Kato, Hideki, Vequizo, Junie Jhon M., Yamakata, Akira, Kobayashi, Hisayoshi, Kobayashi, Makoto, Kakihana, Masato
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089838/
https://www.ncbi.nlm.nih.gov/pubmed/35559064
http://dx.doi.org/10.1039/c8ra07830k
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author Okuno, Kazuya
Kato, Hideki
Vequizo, Junie Jhon M.
Yamakata, Akira
Kobayashi, Hisayoshi
Kobayashi, Makoto
Kakihana, Masato
author_facet Okuno, Kazuya
Kato, Hideki
Vequizo, Junie Jhon M.
Yamakata, Akira
Kobayashi, Hisayoshi
Kobayashi, Makoto
Kakihana, Masato
author_sort Okuno, Kazuya
collection PubMed
description Doping of Cr(6+) into BiVO(4) was examined in this study. A new absorption band with a 1.84 eV energy threshold appeared with Cr-doping. The theoretical band calculation has revealed that the new absorption is ascribed to the electron transition from the valence band to acceptor levels formed by empty Cr 3d orbitals. It was confirmed that photocatalytic water oxidation in the presence of Ag(+) or Fe(3+) of an oxidizing reagent was induced by excitation of the new absorption although activity under band gap excitation decreased with Cr-doping. Characteristics of carrier dynamics were also investigated by transient absorption spectroscopy.
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spelling pubmed-90898382022-05-11 Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi) Okuno, Kazuya Kato, Hideki Vequizo, Junie Jhon M. Yamakata, Akira Kobayashi, Hisayoshi Kobayashi, Makoto Kakihana, Masato RSC Adv Chemistry Doping of Cr(6+) into BiVO(4) was examined in this study. A new absorption band with a 1.84 eV energy threshold appeared with Cr-doping. The theoretical band calculation has revealed that the new absorption is ascribed to the electron transition from the valence band to acceptor levels formed by empty Cr 3d orbitals. It was confirmed that photocatalytic water oxidation in the presence of Ag(+) or Fe(3+) of an oxidizing reagent was induced by excitation of the new absorption although activity under band gap excitation decreased with Cr-doping. Characteristics of carrier dynamics were also investigated by transient absorption spectroscopy. The Royal Society of Chemistry 2018-11-14 /pmc/articles/PMC9089838/ /pubmed/35559064 http://dx.doi.org/10.1039/c8ra07830k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Okuno, Kazuya
Kato, Hideki
Vequizo, Junie Jhon M.
Yamakata, Akira
Kobayashi, Hisayoshi
Kobayashi, Makoto
Kakihana, Masato
Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title_full Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title_fullStr Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title_full_unstemmed Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title_short Expansion of the photoresponse window of a BiVO(4) photocatalyst by doping with chromium(vi)
title_sort expansion of the photoresponse window of a bivo(4) photocatalyst by doping with chromium(vi)
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089838/
https://www.ncbi.nlm.nih.gov/pubmed/35559064
http://dx.doi.org/10.1039/c8ra07830k
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