Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

At present, TiO<sub>2</sub> is one of the most widely used photocatalytic materials. However, the narrow response range to light limits the photocatalytic performance. Herein, we reported a successful construction of self-doped R-WO<sub>3</sub>/R-TiO<sub>2</sub>/C...

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Autores principales: Liaochuan Jiang, Xingyuan Gao, Shaoling Chen, Jangam Ashok, Sibudjing Kawi
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
photocatalysis
electrochemical reduction
photocatalytic degradation
TiO<sub>2</sub>
WO<sub>3</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
Acceso en línea:https://doaj.org/article/2a4093700e8646f4ae85bc65b3088960
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spelling oai:doaj.org-article:2a4093700e8646f4ae85bc65b30889602021-11-25T17:06:11ZOxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue10.3390/catal111113492073-4344https://doaj.org/article/2a4093700e8646f4ae85bc65b30889602021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1349https://doaj.org/toc/2073-4344At present, TiO<sub>2</sub> is one of the most widely used photocatalytic materials. However, the narrow response range to light limits the photocatalytic performance. Herein, we reported a successful construction of self-doped R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC nanocomposites on flexible carbon cloth (CC) via electrochemical reduction to increase the oxygen vacancies (O<sub>vs</sub>), resulting in an enhanced separation efficiency of photo-induced charge carriers. The photocurrent of R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC at −1.6 V (vs. SCE) was 2.6 times higher than that of WO<sub>3</sub>/TiO<sub>2</sub>/CC, which suggested that O<sub>vs</sub> could improve the response to sunlight. Moreover, the photocatalytic activity of R-WO<sub>3</sub>/TiO<sub>2</sub>/CC was explored using methylene blue (MB). The degradation rate of MB could reach 68%, which was 1.3 times and 3.8 times higher than that of WO<sub>3</sub>/TiO<sub>2</sub>/CC and TiO<sub>2</sub>/CC, respectively. Furthermore, the solution resistance and charge transfer resistance of R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC were obviously decreased. Therefore, the electrochemical reduction of nanomaterials enabled a promoted separation of photogenerated electron–hole pairs, leading to high photocatalytic activity.Liaochuan JiangXingyuan GaoShaoling ChenJangam AshokSibudjing KawiMDPI AGarticlephotocatalysiselectrochemical reductionphotocatalytic degradationTiO<sub>2</sub>WO<sub>3</sub>Chemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1349, p 1349 (2021)
institution DOAJ
collection DOAJ
language EN
topic photocatalysis
electrochemical reduction
photocatalytic degradation
TiO<sub>2</sub>
WO<sub>3</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
spellingShingle photocatalysis
electrochemical reduction
photocatalytic degradation
TiO<sub>2</sub>
WO<sub>3</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
Liaochuan Jiang
Xingyuan Gao
Shaoling Chen
Jangam Ashok
Sibudjing Kawi
Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
description At present, TiO<sub>2</sub> is one of the most widely used photocatalytic materials. However, the narrow response range to light limits the photocatalytic performance. Herein, we reported a successful construction of self-doped R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC nanocomposites on flexible carbon cloth (CC) via electrochemical reduction to increase the oxygen vacancies (O<sub>vs</sub>), resulting in an enhanced separation efficiency of photo-induced charge carriers. The photocurrent of R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC at −1.6 V (vs. SCE) was 2.6 times higher than that of WO<sub>3</sub>/TiO<sub>2</sub>/CC, which suggested that O<sub>vs</sub> could improve the response to sunlight. Moreover, the photocatalytic activity of R-WO<sub>3</sub>/TiO<sub>2</sub>/CC was explored using methylene blue (MB). The degradation rate of MB could reach 68%, which was 1.3 times and 3.8 times higher than that of WO<sub>3</sub>/TiO<sub>2</sub>/CC and TiO<sub>2</sub>/CC, respectively. Furthermore, the solution resistance and charge transfer resistance of R-WO<sub>3</sub>/R-TiO<sub>2</sub>/CC were obviously decreased. Therefore, the electrochemical reduction of nanomaterials enabled a promoted separation of photogenerated electron–hole pairs, leading to high photocatalytic activity.
format article
author Liaochuan Jiang
Xingyuan Gao
Shaoling Chen
Jangam Ashok
Sibudjing Kawi
author_facet Liaochuan Jiang
Xingyuan Gao
Shaoling Chen
Jangam Ashok
Sibudjing Kawi
author_sort Liaochuan Jiang
title Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
title_short Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
title_full Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
title_fullStr Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
title_full_unstemmed Oxygen-Deficient WO<sub>3</sub>/TiO<sub>2</sub>/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue
title_sort oxygen-deficient wo<sub>3</sub>/tio<sub>2</sub>/cc nanorod arrays for visible-light photocatalytic degradation of methylene blue
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/2a4093700e8646f4ae85bc65b3088960
work_keys_str_mv AT liaochuanjiang oxygendeficientwosub3subtiosub2subccnanorodarraysforvisiblelightphotocatalyticdegradationofmethyleneblue
AT xingyuangao oxygendeficientwosub3subtiosub2subccnanorodarraysforvisiblelightphotocatalyticdegradationofmethyleneblue
AT shaolingchen oxygendeficientwosub3subtiosub2subccnanorodarraysforvisiblelightphotocatalyticdegradationofmethyleneblue
AT jangamashok oxygendeficientwosub3subtiosub2subccnanorodarraysforvisiblelightphotocatalyticdegradationofmethyleneblue
AT sibudjingkawi oxygendeficientwosub3subtiosub2subccnanorodarraysforvisiblelightphotocatalyticdegradationofmethyleneblue
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