Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant

The photocatalytic performance of the star photocatalyst g-C3N4 is restricted by the insufficient solar light absorption, low surface area and the fast recombination of photogenerated electron-hole pairs. The present study developed a facile in situ method to construct hexagonal boron nitride (h-BN)...

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Main Authors: Jiang, Longbo, Yuan, Xingzhong, Zeng, Guangming, Wu, Zhibin, Liang, Jie, Chen, Xiaohong, Leng, Lijian, Wang, Hui, Wang, Hou
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/138372
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1383722020-05-05T03:22:43Z Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant Jiang, Longbo Yuan, Xingzhong Zeng, Guangming Wu, Zhibin Liang, Jie Chen, Xiaohong Leng, Lijian Wang, Hui Wang, Hou School of Chemical and Biomedical Engineering Engineering::Chemical engineering Metal-free H-BN/g-C3N4 The photocatalytic performance of the star photocatalyst g-C3N4 is restricted by the insufficient solar light absorption, low surface area and the fast recombination of photogenerated electron-hole pairs. The present study developed a facile in situ method to construct hexagonal boron nitride (h-BN) decorated g-C3N4 metal-free heterojunction with the aim to greatly enhance the surface area and promote the charge separation. The physical, chemical and optical properties of the resulted samples were thoroughly characterized. The photocatalytic performance of h-BN/g-C3N4 composites were evaluated under visible light irradiation using antibiotic tetracycline (TC) and rhodamine B (RhB) as target pollutants. Results showed that h-BN/g-C3N4 composites exhibited much higher photocatalytic activity than pure g-C3N4 and h-BN. The optimum photocatalytic efficiency of BC-3 sample for the degradation of TC was about 2.3 and 60.3 times higher than that of individual g-C3N4 and h-BN, respectively. Meanwhile, it was about 7.3 and 11.8 times higher than that of individual g-C3N4 and h-BN for RhB degradation, respectively. The enhanced photocatalytic activity of h-BN/g-C3N4 composite is mainly attributed to the larger surface area and the unique physicochemical properties of h-BN nanosheet which acts as a promoter for photoexcited holes transfer. This work indicates that the metal-free h-BN/g-C3N4 hybrid photocatalyst is a promising material in wastewater control. 2020-05-05T03:22:42Z 2020-05-05T03:22:42Z 2017 Journal Article Jiang, L., Yuan, X., Zeng, G., Wu, Z., Liang, J., Chen, X., . . . Wang, H. (2018). Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant. Applied Catalysis B: Environmental, 221, 715-725. doi:10.1016/j.apcatb.2017.09.059 0926-3373 https://hdl.handle.net/10356/138372 10.1016/j.apcatb.2017.09.059 2-s2.0-85030330885 221 715 725 en Applied Catalysis B: Environmental © 2017 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
Metal-free
H-BN/g-C3N4
spellingShingle Engineering::Chemical engineering
Metal-free
H-BN/g-C3N4
Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Wu, Zhibin
Liang, Jie
Chen, Xiaohong
Leng, Lijian
Wang, Hui
Wang, Hou
Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
description The photocatalytic performance of the star photocatalyst g-C3N4 is restricted by the insufficient solar light absorption, low surface area and the fast recombination of photogenerated electron-hole pairs. The present study developed a facile in situ method to construct hexagonal boron nitride (h-BN) decorated g-C3N4 metal-free heterojunction with the aim to greatly enhance the surface area and promote the charge separation. The physical, chemical and optical properties of the resulted samples were thoroughly characterized. The photocatalytic performance of h-BN/g-C3N4 composites were evaluated under visible light irradiation using antibiotic tetracycline (TC) and rhodamine B (RhB) as target pollutants. Results showed that h-BN/g-C3N4 composites exhibited much higher photocatalytic activity than pure g-C3N4 and h-BN. The optimum photocatalytic efficiency of BC-3 sample for the degradation of TC was about 2.3 and 60.3 times higher than that of individual g-C3N4 and h-BN, respectively. Meanwhile, it was about 7.3 and 11.8 times higher than that of individual g-C3N4 and h-BN for RhB degradation, respectively. The enhanced photocatalytic activity of h-BN/g-C3N4 composite is mainly attributed to the larger surface area and the unique physicochemical properties of h-BN nanosheet which acts as a promoter for photoexcited holes transfer. This work indicates that the metal-free h-BN/g-C3N4 hybrid photocatalyst is a promising material in wastewater control.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Wu, Zhibin
Liang, Jie
Chen, Xiaohong
Leng, Lijian
Wang, Hui
Wang, Hou
format Article
author Jiang, Longbo
Yuan, Xingzhong
Zeng, Guangming
Wu, Zhibin
Liang, Jie
Chen, Xiaohong
Leng, Lijian
Wang, Hui
Wang, Hou
author_sort Jiang, Longbo
title Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
title_short Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
title_full Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
title_fullStr Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
title_full_unstemmed Metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
title_sort metal-free efficient photocatalyst for stable visible-light photocatalytic degradation of refractory pollutant
publishDate 2020
url https://hdl.handle.net/10356/138372
_version_ 1681059129729220608