Enhanced visible-light photocatalytic activity by Ag 3 PO 4 –Ag–Bi 2 WO 6 Z-scheme heterojunction

Micro & nano letters

article

Qicheng Zhang¹  Qian Yang¹  Sen Xu¹  Zhichang Duan¹  Wensong Lin¹ 

[1] School of Materials Engineering, Shanghai University of Engineering Science

关键词: semiconductor materials;    bismuth compounds;    precipitation (physical chemistry);    nanofabrication;    nanoparticles;    decomposition;    silver compounds;    silver;    semiconductor growth;    semiconductor heterojunctions;    photocatalysis;    photocatalysts;    surface chemistry;    dyes;    electron-hole recombination;    charge exchange;    Z-scheme heterojunction;    semiconductor heterojunction;    visible-light photocatalytic activity;    deposition–precipitation method;    morphology;    organic pigment degradation;    nanoparticles;    charge transfer;    electron–hole pair separation;    decomposition;    methylene blue;    Ag3PO4-Ag-Bi2WO6;    Ag3PO4-Ag-Bi2WO6;   

DOI  :  10.1049/mnl.2020.0212

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A novel material of Ag 3 PO 4 –Ag–Bi 2 WO 6 Z-scheme heterojunction has been successfully synthesised using a simple deposition–precipitation method. In this work, the authors used diverse techniques to characterise the structure, catalytic performance, and morphology of the prepared materials. Meanwhile, the catalytic performance of prepared materials was evaluated by degrading organic pigment. The excellent catalytic performance of the material is according to the collaboration of Ag nanoparticles in the Ag 3 PO 4 –Ag–Bi 2 WO 6 heterojunction. Ag nanoparticles enhance the stableness and activeness of the catalyst by acting as a charge transfer bridge between Ag 3 PO 4 and Bi 2 WO 6 , which results in improving electron–hole pairs’ separation. Compared with pure Bi 2 WO 6 and Ag 3 PO 4 –Bi 2 WO 6 materials, Ag 3 PO 4 –Ag–Bi 2 WO 6 has higher decomposition effectiveness of methylene blue under the same conditions. The photocatalytic mechanism was put forward and the process of the hole–electron pair's separation is discussed in detail, which is due to the formation of the Z-scheme heterojunction with Ag nanoparticles acted as a charge transfer bridge.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND