Citation: Yan Song, Ran Wang, Xiuyuan Li, Baiqi Shao, Hongpeng You, Chaozheng He. Constructing a novel Ag nanowire@CeVO₄ heterostructure photocatalyst for promoting charge separation and sunlight driven photodegradation of organic pollutants[J]. Chinese Chemical Letters, ;2022, 33(3): 1283-1287. doi: 10.1016/j.cclet.2021.07.060 shu

Constructing a novel Ag nanowire@CeVO₄ heterostructure photocatalyst for promoting charge separation and sunlight driven photodegradation of organic pollutants

Yan Song ^{a, 1} ,
Ran Wang ^{a, 1} ,
Xiuyuan Li ^a ,
Baiqi Shao ^{b, c} ,
Hongpeng You ^{b, c} ,
Chaozheng He ^{a, *,}

a.
Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China
b.
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
c.
University of Science and Technology of China, Hefei 230026, China

hecz2019@xatu.edu.cn

Received Date: 21 May 2021
Revised Date: 11 June 2021
Accepted Date: 26 July 2021
Available Online: 31 July 2021

Figures(4)

Exploiting efficient and recyclable photocatalysts is a vital matter for environmental purification. Herein, cerium vanadate (CeVO₄) sub-microspheres and silver nanowire (AgNW)@CeVO₄ with core-shell architecture as photocatalysts are rationally constructed by hydrothermal approach. The AgNW@CeVO₄ photocatalyst obtained by depositing CeVO₄ on the surface of Ag NWs possess one dimensional continuous structure, which expand the optical absorption range and reduce the band gap of CeVO₄ photocatalyst. Moreover, the resultant AgNW@CeVO₄ photocatalyst demonstrates superior photocatalytic performance in the degradation of rhodamine B, methylene blue, and 4-nitrophenol pollutants upon solar light irradiation, compared with pure CeVO₄. The excellent photocatalytic activity can be ascribed to the introduction of Ag NWs, which afford rapid charge transport channels and reservoir for the electrons in the AgNW@CeVO₄ heterostructure to promote separation of electron–hole pairs. The first-principles investigations reveal increase of adsorption energy of oxygen molecules on the CeVO₄ surface with the presence of Ag. Meanwhile, Ag NWs can further improve the photocatalytic efficiency of the AgNW@CeVO₄ based on the plasmonic effect. More importantly, the good structural stability and recyclability of AgNW@CeVO₄ are observed due to the strong synergistic effect, which ensures long-term usability of photocatalyst and great promise in water purification. This work can offer valuable reference into designs and construction of Ce-based heterojunction photocatalysts for environmental remediation.
- Cerium vanadate,
- Photocatalyst,
- Heterojunction,
- Degradation mechanism,
- First-principles
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Constructing a novel Ag nanowire@CeVO4 heterostructure photocatalyst for promoting charge separation and sunlight driven photodegradation of organic pollutants

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通讯作者: 陈斌, bchen63@163.com

Constructing a novel Ag nanowire@CeVO₄ heterostructure photocatalyst for promoting charge separation and sunlight driven photodegradation of organic pollutants