Preparation and Photocatalysis of CuO/Bentonite Based on Adsorption and Photocatalytic Activity

被引：14
作者：
Yang, Cuina [1 ,2 ]
Xu, Hongfa [1 ]
Shi, Jicun [2 ]
Liu, Zhifeng [3 ]
Zhao, Lei [2 ]
机构：
[1] Army Engn Univ PLA, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China
[2] Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China
[3] Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China
来源：
MATERIALS | 2021年 / 14卷 / 19期
关键词：
CuO; bentonite; CuO/bentonite composite; adsorption; photocatalysis; METHYLENE-BLUE; DEGRADATION; BENTONITE; PHOTODECOLORIZATION; NANOCOMPOSITE; DECOMPOSITION; ENHANCEMENT; FABRICATION; NANOWIRES; KINETICS;
D O I：
10.3390/ma14195803
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：
A CuO/bentonite composite photocatalyst was prepared to fully utilize the adsorption capacity of bentonite and the photocatalytic activity of CuO. CuO and bentonite were chosen as a photocatalyst due to the excellent optical property of CuO and large specific surface area of bentonite, together with their high stability and low production cost. The sample was characterized by XRD, SEM, and BET. The effects of several factors on degradation process were investigated such as dosage of H2O2, irradiation time, pH of the solution, and dosage of catalyst. The optimum conditions for decolorization of methylene blue solution by CuO/bentonite were determined. Under optimal conditions, the decolorization efficiency of methylene blue by a 1.4% CuO/bentonite (400 & DEG;C) composite photocatalyst under visible irradiation at 240 min reached 96.98%. The degradation process follow edpseudo-second-order kinetics. The photocatalytic mechanism is discussed in detail. This composite structure provides a new solution to the cycle and aggregation of the photocatalyst in water.
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页数：15
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