Ag沉积CuO-ZnO纳米复合材料的溶胶-凝胶合成及光催化性能研究

doi:10.11896/cldb.19050066

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Abstract Photocatalytic degradation of water pollution by solar energy is a reliable way for environment remediation with minimum associated costs. However, developing a photocatalytic system with high performance, recyclability and low cost has become a practical problem due to the complexity of photodegradation process. We demonstrated a Ag-loaded CuO-ZnO nano-photocatalysts by a facile sol-gel method, the CuO-ZnO structure was obtained by doping with high concentration of Cu ions.The samples were characterized by a variety of test methods. XRD confirmed the presence of CuO and Ag. SEM showed that the morphology of ZnO particles was affected by Ag deposition. XPS showed that Ag deposition affected the transition from Cu²⁺ to Cu⁺. Under the simulated sunlight and ultraviolet light, small trace(2mol%) of Ag modified CuO-ZnO exhibited higher photocatalytic activity than that of the unmodified sample in the photocatalytic degradation of methylene blue (MB) and methyl orange (MO) aqueous solutions of organic pollutants. The improvement of photocatalytic performance is mainly attributed to the enhancement of visible light utilization, effective separation of photogenic charge, optimization of morphology and structure, and conversion of surface chemical states, the ternary composite photocatalytic system providing an effective way for water pollution restoration by its excellent photocatalytic performance, low precious metal usage and recyclability.

Key words： photocatalytic sol-gel method Ag-loaded CuO-ZnO heterojunction valence variable metal ion

Published: 26 April 2020

CLC number:

O614

Fund:This work was financially supported by the Sichuan Province Academic and Technical Leader Training Fund (26727502), the Key Project of Applied Basic Research of Sichuan Science and Technology Department (2017JY0349) and Southwest Minzu University Graduate Innovative Research Fund (CX2019SZ21)

Corresponding Authors: Ming Xureceived his Ph.D. degree in Condensed Physics from Institute of Physics (CAS) in 2000. He is currently a professor of physics in Southwest University for Nationalities. His research interests are photoelectric functional nanomaterials and devices.

About author:: Wenyu Hu, a master student in materials science at Southwest Minzu University, is engaged in the research of oxide functional materials.

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	HU Wenyu
	WANG Xiaoyi
	YUAN Huan
	LIU Yutong
	CHEN Yu
	ZHANG Qiuping
	ZHANG Jiaxi
	LUO Kaiyi
	LI Jing
	XU Ming

Cite this article:

HU Wenyu,WANG Xiaoyi,YUAN Huan, et al. Synthesis of Ag-loaded CuO-ZnO Nanocomposites by a Facile Sol-Gel Method for Enhanced Photocatalytic Activity[J]. Materials Reports, 2020, 34(10): 10018-10023.

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http://www.mater-rep.com/EN/10.11896/cldb.19050066 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10018

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