The synthesis of CB[8]/ZnO composites materials with enhanced photocatalytic activities
Lan Li,
Lin Liu,
Zhuang Li,
Danling Hu,
Chao Gao,
Jinyan Xiong,
Wei Li
Affiliations
Lan Li
Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Lin Liu
Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Zhuang Li
Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Danling Hu
Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Chao Gao
Corresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Jinyan Xiong
Corresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Wei Li
Corresponding author.; Hubei Key Laboratory of Biomass Fiber and Eco-dyeing &F inishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
Enhancing the separation of hole-electron pairs is one of the valid pathway to enhance the photocatalytic degradation performance of semiconductors. In this work, cucurbit[8]uril/zinc oxide (CB[8]/ZnO) composites were prepared. The structure, morphology, surface elements and optical properties of the composite are characterized by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoemission spectroscopy, thermogravimetric analysis, and specific surface area measurements. In the photocatalytic degradation of 500 mg/L reactive brilliant red X-3B and 400 mg/L reactive yellow X-RG solutions, the rate constant of the CB[8]/ZnO composite is six times that of pure ZnO. A possible photocatalytic degradation mechanism is proposed. Zn2+ ions chelate with the carbonyl group of CB[8] on the surface of CB[8]/ZnO. Under ultraviolet-visible light irradiation, the generated holes of ZnO are transferred to and trapped on the CB[8] units to facilitate the separation of electron-hole pairs, improving the photocatalytic performance of this system.
