In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant

Artificial Z-scheme photocatalyst can not only reduce the recombination of photogeneraged electron–holepairs, but also retain prominent redox ability. In this study, direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst was successfully synthesized by one step co-calcination stratage using...

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Main Authors: Jiang, Longbo, Yuan, Xingzhong, Zeng, Guangming, Liang, Jie, Chen, Xiaohong, Yu, Hanbo, Wang, Hou, Wu, Zhibin, Zhang, Jin, Xiong, Ting
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/138371
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1383712020-05-05T03:18:56Z In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant Jiang, Longbo Yuan, Xingzhong Zeng, Guangming Liang, Jie Chen, Xiaohong Yu, Hanbo Wang, Hou Wu, Zhibin Zhang, Jin Xiong, Ting School of Chemical and Biomedical Engineering Engineering::Chemical engineering WO3/g-C3N4/Bi2O3 Photocatalysis Artificial Z-scheme photocatalyst can not only reduce the recombination of photogeneraged electron–holepairs, but also retain prominent redox ability. In this study, direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst was successfully synthesized by one step co-calcination stratage using tungstic acid, melamine and bismuth (III) nitrate pentahydrate as the precursors. Surface, morphological, and structural properties of the resulting materials were comprehensive characterized by XRD, XPS, SEM, TEM, UV–vis diffuse reflection spectroscopy, BET surface areas, photoluminescence and ESR analysis. The WO3/g-C3N4/Bi2O3 composite exhibited superior photocatalytic activities for tetracycline degradation than that of pure g-C3N4, WO3, Bi2O3 and their binary composites under visible light irradiation. The enhanced photocatalytic performance of WO3/g-C3N4/Bi2O3 composite can be ascribed to improved visible light absorption, increased surface area and enhanced separation efficiency of photo-generated electron-hole pairs. In addition, the photocatalyst exhibits high stability and reusability. On the basis of the results, a novel direct solid-state dual Z-scheme photocatalytic mechanism was also proposed. 2020-05-05T03:18:56Z 2020-05-05T03:18:56Z 2018 Journal Article Jiang, L., Yuan, X., Zeng, G., Liang, J., Chen, X., Yu, H., . . . Xiong, T. (2018). In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant. Applied Catalysis B: Environmental, 227, 376-385. doi:10.1016/j.apcatb.2018.01.042 0926-3373 https://hdl.handle.net/10356/138371 10.1016/j.apcatb.2018.01.042 2-s2.0-85043269471 227 376 385 en Applied Catalysis B: Environmental © 2018 Elsevier B.V. All rights reserved. This paper was published in Applied Catalysis B: Environmental and is made available with permission of Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Chemical engineering
WO3/g-C3N4/Bi2O3
Photocatalysis
spellingShingle Engineering::Chemical engineering
WO3/g-C3N4/Bi2O3
Photocatalysis
Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Liang, Jie
Chen, Xiaohong
Yu, Hanbo
Wang, Hou
Wu, Zhibin
Zhang, Jin
Xiong, Ting
In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
description Artificial Z-scheme photocatalyst can not only reduce the recombination of photogeneraged electron–holepairs, but also retain prominent redox ability. In this study, direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst was successfully synthesized by one step co-calcination stratage using tungstic acid, melamine and bismuth (III) nitrate pentahydrate as the precursors. Surface, morphological, and structural properties of the resulting materials were comprehensive characterized by XRD, XPS, SEM, TEM, UV–vis diffuse reflection spectroscopy, BET surface areas, photoluminescence and ESR analysis. The WO3/g-C3N4/Bi2O3 composite exhibited superior photocatalytic activities for tetracycline degradation than that of pure g-C3N4, WO3, Bi2O3 and their binary composites under visible light irradiation. The enhanced photocatalytic performance of WO3/g-C3N4/Bi2O3 composite can be ascribed to improved visible light absorption, increased surface area and enhanced separation efficiency of photo-generated electron-hole pairs. In addition, the photocatalyst exhibits high stability and reusability. On the basis of the results, a novel direct solid-state dual Z-scheme photocatalytic mechanism was also proposed.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Liang, Jie
Chen, Xiaohong
Yu, Hanbo
Wang, Hou
Wu, Zhibin
Zhang, Jin
Xiong, Ting
format Article
author Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Liang, Jie
Chen, Xiaohong
Yu, Hanbo
Wang, Hou
Wu, Zhibin
Zhang, Jin
Xiong, Ting
author_sort Jiang, Longbo
title In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
title_short In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
title_full In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
title_fullStr In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
title_full_unstemmed In-situ synthesis of direct solid-state dual Z-scheme WO3/g-C3N4/Bi2O3 photocatalyst for the degradation of refractory pollutant
title_sort in-situ synthesis of direct solid-state dual z-scheme wo3/g-c3n4/bi2o3 photocatalyst for the degradation of refractory pollutant
publishDate 2020
url https://hdl.handle.net/10356/138371
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