Citation: ZHANG Guan-Hua, CHEN Yu-Fu, MENG Yue, ZHANG Lian-Yang, XUE Ji-Long, XIA Sheng-Jie, NI Zhe-Ming. Preparation and Photocatalytic Activity of AuCu/ZnAl-LDO Composite Photocatalysts[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(5): 875-884. doi: 10.11862/CJIC.2020.105 shu

Preparation and Photocatalytic Activity of AuCu/ZnAl-LDO Composite Photocatalysts

1.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
2.
School of Life Sciences, Huzhou University, Huzhou, Zhejiang 313000, China
3.
Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, China

Corresponding author: XIA Sheng-Jie, xiasj@zjut.edu.cn NI Zhe-Ming, jchx@zjut.edu.cn
Received Date: 23 February 2020
Revised Date: 22 March 2020

Figures(10)

Gold and copper nanoparticles were supported on the surface of zinc-aluminum layered double hydroxides (AuCu/ZnAl-LDHs) by method of impregnation-reduction. Mixed metal oxides (AuCu/ZnAl-LDO) were obtained from AuCu/ZnAl-LDHs after calcination. The as-prepared photocatalysts were well characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UVVis diffuse reflectance spectroscopy (UV-Vis DRS) to investigate the crystal structures, microstructure, elemental composition and visible light absorption capability. The photocatalytic performance of AuCu/ZnAl-LDO was studied by degradation of catechol under visible Light. The results of experimental indicated that AuCu/ZnAl-LDO had stronger visible light absorption capacity than pure zinc-aluminum mixed metal oxides (ZnAl-LDO). The degradation efficiency of catechol reached 94.5% after 5 h irradiation, when loading ratio of AuCu was 5:1 and calcination temperature was 400℃. The photodegradation reaction rate constant was 13.4 times that of ZnAl-LDO. In addition, The path of AuCu/ZnAl-LDO electron transfer was deduced and a possible photocatalytic degradation mechanism was proposed by density functional theory calculation.
- AuCu/ZnAl-LDO,
- photocatalytic,
- electron transfer,
- density functional theory
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