High Piezo-photocatalytic Efficiency of CuS/ZnO Nanowires Using Both Solar and Mechanical Energy for Degrading Organic Dye

被引：290

作者：

Hong, Deyi ^{[1
]}

Zang, Weili ^{[1
]}

Guo, Xiao ^{[1
]}

Fu, Yongming ^{[1
]}

He, Haoxuan ^{[1
]}

Sun, Jing ^{[1
]}

Xing, Lili ^{[1
]}

Liu, Baodan ^{[2
]}

Xue, Xinyu ^{[1
]}

机构：

[1] Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci SYNL, Shenyang 110016, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 33期

基金：

中国国家自然科学基金;

关键词：

photocatalytic activity; piezoelectric effect; heterostructure; CuS/ZnO nanowire; piezo-photocatalytic process; METHYLENE-BLUE; UV PHOTODETECTION; THIN-FILMS; ZNO; DEGRADATION; HETEROSTRUCTURE; OXIDE; HETEROJUNCTION; SURFACE; ARRAYS;

D O I：

10.1021/acsami.6b05252

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High piezo-photo catalytic efficiency of degrading organic pollutants has been realized from CuS/ZnO nanowires using both solar and mechanical energy. CuS/ZnO heterostructured nanowire arrays are compactly/vertically aligned on stainless steel mesh by a simple two-step wet-chemical method. The mesh supported nanocomposites can facilitate an efficient light harvesting due to the large surface area and can also be easily removed from the treated solution. Under both solar and ultrasonic irradiation, CuS/ZnO nanowires can rapidly degrade methylene blue (MB) in aqueous solution, and the recyclability is investigated. In this process, the ultrasonic assistance can greatly enhance the photocatalytic activity. Such a performance can be attributed to the coupling of the built-in electric field of heterostructures and the piezoelectric field of ZnO nanowires. The built-in electric field of the heterostructure can effectively separate the photogenerated electrons/holes and facilitate the carrier transportation. The CuS component can improve the visible light utilization. The piezoelectric field created by ZnO nanowires can further separate the photogenerated electrons/holes through driving them to migrate along opposite directions. The present results demonstrate a new water-pollution solution in green technologies for the environmental remediation at the industrial level.

引用

页码：21302 / 21314

页数：13

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