Facile construction of Z-scheme AgCl/Ag-doped-ZIF-8 heterojunction with narrow band gaps for efficient visible-light photocatalysis

被引：48
作者：
Chang, Na [1 ,3 ]
Chen, Yan-Ru [2 ]
Xie, Feng [1 ]
Liu, Ya-Pan [2 ]
Wang, Hai-Tao [2 ,3 ]
机构：
[1] Tiangong Univ, Sch Chem & Chem Engn, Tianjin 300387, Peoples R China
[2] Tiangong Univ, Sch Environm Sci & Engn, Tianjin 300387, Peoples R China
[3] State Key Lab Separat Membrane & Membrane Proc, Tianjin 300387, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2021年 / 616卷
基金：
国家重点研发计划;
关键词：
ZIF-8; AgCl; Photocatalysis; Z-scheme heterojunction; Doping; METAL-ORGANIC FRAMEWORK; ASSISTED SYNTHESIS; ELECTRON-TRANSFER; DEGRADATION; DRIVEN; ZIF-8; PHOTOREDUCTION; NANOPARTICLES; MECHANISMS; ADSORPTION;
D O I：
10.1016/j.colsurfa.2021.126351
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
It is of great importance to fabricate photocatalyst with high photocatalytic activity, and the formation of Zscheme heterojunction photocatalyst has been proved to be an effective way to restrain the recombination of photo-induced carriers. In this work, Z-scheme AgCl/Ag-doped-ZIF-8 heterojunction is synthesized via a two-step process involving appropriate amount of cationic Ag ion doping into the imidazole ring of ZIF-8 framework and the precipitation of AgCl onto this Ag-doped-ZIF-8. The successful doping of ZIF-8 which decreases the band gap energy, enhances the light harvesting. Besides, the separation efficiency of photo-induced carriers is further improved due to the formation of Z-scheme AgCl/Ag-doped-ZIF-8 heterojunction, which is confirmed by photoelectrochemical experiments. As a result, the as-prepared AgCl/Ag-doped-ZIF-8 photocatalyst possesses excellent photocatalytic activity under visible light illumination. This work will provide a novel perspective for the design and construction of Z-scheme heterojunction for highly efficient photocatalysis.
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页数：10
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