Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity

Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity

Water pollution caused by dye wastewater is a potential threat to human health. Using photocatalysis technology to deal with dye wastewater has the advantages of strong purification and no secondary pollution, so it is greatly significant to look for new visible-light photocatalysts with high photoc...

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Autores principales: Xin Yan, Yuanyuan Wang, Bingbing Kang, Zhuo Li, Yanhui Niu
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
photocatalysis
Ag<sub>3</sub>PO<sub>4</sub>
g-C<sub>3</sub>N<sub>4</sub>
heterojunction
degradation
Crystallography
QD901-999
Acceso en línea:https://doaj.org/article/62ce904fee384d4bb97c9dac44169c24
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spelling oai:doaj.org-article:62ce904fee384d4bb97c9dac44169c242021-11-25T17:19:04ZPreparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity10.3390/cryst111113732073-4352https://doaj.org/article/62ce904fee384d4bb97c9dac44169c242021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1373https://doaj.org/toc/2073-4352Water pollution caused by dye wastewater is a potential threat to human health. Using photocatalysis technology to deal with dye wastewater has the advantages of strong purification and no secondary pollution, so it is greatly significant to look for new visible-light photocatalysts with high photocatalytic ability for dye wastewater degradation. Semiconductor photocatalyst silver phosphate (Ag<sub>3</sub>PO<sub>4</sub>) has high quantum efficiency and photocatalytic degradation activity. However, Ag<sub>3</sub>PO<sub>4</sub> is prone to photoelectron corrosion and becomes unstable during photocatalysis, which severely limits its application in this field. In this study, a tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> heterojunction was constructed by the chemical precipitation method. An Ag<sub>3</sub>PO<sub>4</sub> nanoparticle was loaded onto the surface of the tubelike g-C<sub>3</sub>N<sub>4,</sub> forming close contact. The photocatalytic activity of the photocatalyst was evaluated by the degradation of RhB under visible-light irradiation. The tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub>-5% heterojunction exhibited optimal photocatalytic performance. In an optimal process, the degradation rate of the RhB is 90% under visible-light irradiation for 40 min. The recycling experiment showed that there was no apparent decrease in the activity of tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub>-5% heterojunction after five consecutive runs. A possible Z-type mechanism is proposed to explain the high activity and stability of the heterojunction.Xin YanYuanyuan WangBingbing KangZhuo LiYanhui NiuMDPI AGarticlephotocatalysisAg<sub>3</sub>PO<sub>4</sub>g-C<sub>3</sub>N<sub>4</sub>heterojunctiondegradationCrystallographyQD901-999ENCrystals, Vol 11, Iss 1373, p 1373 (2021)
institution DOAJ
collection DOAJ
language EN
topic photocatalysis
Ag<sub>3</sub>PO<sub>4</sub>
g-C<sub>3</sub>N<sub>4</sub>
heterojunction
degradation
Crystallography
QD901-999
spellingShingle photocatalysis
Ag<sub>3</sub>PO<sub>4</sub>
g-C<sub>3</sub>N<sub>4</sub>
heterojunction
degradation
Crystallography
QD901-999
Xin Yan
Yuanyuan Wang
Bingbing Kang
Zhuo Li
Yanhui Niu
Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
description Water pollution caused by dye wastewater is a potential threat to human health. Using photocatalysis technology to deal with dye wastewater has the advantages of strong purification and no secondary pollution, so it is greatly significant to look for new visible-light photocatalysts with high photocatalytic ability for dye wastewater degradation. Semiconductor photocatalyst silver phosphate (Ag<sub>3</sub>PO<sub>4</sub>) has high quantum efficiency and photocatalytic degradation activity. However, Ag<sub>3</sub>PO<sub>4</sub> is prone to photoelectron corrosion and becomes unstable during photocatalysis, which severely limits its application in this field. In this study, a tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> heterojunction was constructed by the chemical precipitation method. An Ag<sub>3</sub>PO<sub>4</sub> nanoparticle was loaded onto the surface of the tubelike g-C<sub>3</sub>N<sub>4,</sub> forming close contact. The photocatalytic activity of the photocatalyst was evaluated by the degradation of RhB under visible-light irradiation. The tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub>-5% heterojunction exhibited optimal photocatalytic performance. In an optimal process, the degradation rate of the RhB is 90% under visible-light irradiation for 40 min. The recycling experiment showed that there was no apparent decrease in the activity of tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub>-5% heterojunction after five consecutive runs. A possible Z-type mechanism is proposed to explain the high activity and stability of the heterojunction.
format article
author Xin Yan
Yuanyuan Wang
Bingbing Kang
Zhuo Li
Yanhui Niu
author_facet Xin Yan
Yuanyuan Wang
Bingbing Kang
Zhuo Li
Yanhui Niu
author_sort Xin Yan
title Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
title_short Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
title_full Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
title_fullStr Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
title_full_unstemmed Preparation and Characterization of Tubelike g-C<sub>3</sub>N<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub> Heterojunction with Enhanced Visible-Light Photocatalytic Activity
title_sort preparation and characterization of tubelike g-c<sub>3</sub>n<sub>4</sub>/ag<sub>3</sub>po<sub>4</sub> heterojunction with enhanced visible-light photocatalytic activity
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/62ce904fee384d4bb97c9dac44169c24
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AT yuanyuanwang preparationandcharacterizationoftubelikegcsub3subnsub4subagsub3subposub4subheterojunctionwithenhancedvisiblelightphotocatalyticactivity
AT bingbingkang preparationandcharacterizationoftubelikegcsub3subnsub4subagsub3subposub4subheterojunctionwithenhancedvisiblelightphotocatalyticactivity
AT zhuoli preparationandcharacterizationoftubelikegcsub3subnsub4subagsub3subposub4subheterojunctionwithenhancedvisiblelightphotocatalyticactivity
AT yanhuiniu preparationandcharacterizationoftubelikegcsub3subnsub4subagsub3subposub4subheterojunctionwithenhancedvisiblelightphotocatalyticactivity
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