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Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity

Published online by Cambridge University Press:  20 May 2019

Xuehua Yan
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Institute for Advanced Materials, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Institute of Green Materials and Metallurgy, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Xiaoxue Yuan
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Jinging Wang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Qiong Wang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Chen Zhou
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Dongfeng Wang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Hua Tang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Jianmei Pan
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Xiaonong Cheng
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Institute of Green Materials and Metallurgy, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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Abstract

A novel and highly efficient Ag3VO4/C3N4/reduced TiO2 microsphere composite was obtained through a hydrothermal and depositional process. The microstructure, individual components with different proportions, and optical properties of the ternary nanocomposites were intensively studied. The prepared ternary composites exhibited superior photocatalytic performance of degradation of methylene blue compared with single component and S1 (C3N4/reduced TiO2) binary composites, demonstrating that the introduction of Ag3VO4 into g-C3N4/r-TiO2 can effectively improve the photocatalytic activity. Recycling experiments confirmed that the nanocomposites exhibited superior cycle performance. The enhanced capability could be attributed to a synergetic effect including the formation of heterojunction, large surface area, improved light absorption, matched energy band structure, and the improved separation efficiency of photogenerated charges coming from dual Z-scheme structure. Particularly, the introduction of Ag3VO4 makes the dual Z-scheme charge transfer pathway completed with improved separation efficiency and stronger redox ability of photogenerated electrons and holes. The work provides a promising method to develop a new dual Z-scheme photocatalytic system to remove environmental pollutant.

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Copyright © Materials Research Society 2019 

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Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity
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Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity
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