High piezocatalytic capability in CuS/MoS2 nanocomposites using mechanical energy for degrading pollutants

被引：56
作者：
Li, Hongjing [1 ]
Xiong, Yi [1 ,2 ]
Wang, Yumin [1 ]
Ma, Wenmei [1 ]
Fang, Jiapeng [1 ]
Li, Xu [1 ]
Han, Qing [1 ]
Liu, Yong [1 ]
He, Chunqing [1 ]
Fang, Pengfei [1 ]
机构：
[1] Wuhan Univ, Sch Phys & Technol, Key Lab Nucl Solid State Phys Hubei Prov, Wuhan 430072, Peoples R China
[2] Wuhan Text Univ, Sci & Technol Inst, Lab Electron Microscopy, Wuhan 430073, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 609卷
基金：
中国国家自然科学基金;
关键词：
Piezocatalysis; MoS2; nanosheets; Mechanical energy; Heterostructure; Environmental; remediation; ENHANCED PHOTOCATALYTIC DEGRADATION; ORGANIC-DYE POLLUTANTS; MOLYBDENUM-DISULFIDE; PIEZO-CATALYST; LAYER MOS2; SINGLE; CUS; SURFACE; WATER; PIEZOELECTRICITY;
D O I：
10.1016/j.jcis.2021.11.070
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：
Piezocatalysis, driven by mechanical energy and piezoelectric effect, is of great potential in addressing the environmental issues. In this work, a piezoelectric catalyst was fabricated by growing few-layer MoS2 nanosheets onto CuS, for the piezocatalytic degradation of Rhodamine B (RhB), methylene blue (MB) and hexavalent chromium (Cr (VI)). The excellent removal efficiency of Cr (VI) and RhB can be reached 100% within 180 s, through the piezocatalysis of CuS/MoS2-0.6 driven by mechanical stirring in the dark. Impressively, the piezoelectric current of CuS/MoS2-0.6 is 48 and 35.7 times higher than that of pure CuS and MoS2, respectively. The significantly enhanced piezocatalytic performance can be ascribed to the formation of CuS/MoS2 heterojunction and the piezoelectric field generated by MoS2 nanosheets, which promotes the efficient separation of electrons and holes. This study provides insights into strategies to improve catalytic performance through utilizing mechanical energy and opens a new horizon for environmental remediation. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码：657 / 666
页数：10
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