CuInS2/Mg(OH)2 Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

Xiaogang Zheng; Yiting Mao; Jing Wen; Xiaojin Fu; Xinhui Liu

doi:10.3390/nano9111567

CuInS₂/Mg(OH)₂ Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

Nanomaterials (Basel). 2019 Nov 5;9(11):1567. doi: 10.3390/nano9111567.

Authors

Xiaogang Zheng¹, Yiting Mao¹, Jing Wen², Xiaojin Fu¹, Xinhui Liu³

Affiliations

¹ College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China.
² Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China.
³ State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.

Abstract

CuInS₂/Mg(OH)₂ (CIS/Mg(OH)₂) nanosheets have been prepared for the visible light activated photodegradation of tetracycline hydrochloride (TCH). The introduction of CuInS₂ has proven to enhance the photocatalytic activity of Mg(OH)₂ nanosheets. It's ascribed to the enhanced transfer and separation of charge carriers at the junction interface between CuInS₂ and Mg(OH)₂. The photocatalytic activity of obtained CIS/Mg(OH)₂ is greatly affected by CuInS₂ content, pH value, and inorganic ions. Among these samples, 2-CIS/Mg(OH)₂ exhibits the excellent photocatalytic activity and durability for the visible light driven removal of TCH after five cycle times. Atomic force microscope (AFM) images indicate that the surface roughness of 2-CIS/Mg(OH)₂ is intensively influenced in adsorption-photocatalysis process. The •O₂^- and •OH radicals are vital for the visible light driven photocatalytic activity of 2-CIS/Mg(OH)₂ for TCH removal.

Keywords: CuInS2/Mg(OH)2 nanosheets; heterojunction; photocatalysis; tetracycline hydrochloride.

Abstract

Grants and funding