Preparation and Properties of Ag/CuO/TiO2/Natural Zeolite Based Composites with Visible Light Photocatalytic/Antibacterial Properties

Abstract

Abstract: The Ag/CuO/TiO₂/natural zeolite composites were prepared by impregnation-calcination method to immobilize CuO/TiO₂ particles on the surface of natural zeolite after acid treatment, and then Ag nanoparticles were immobilized on the surface of CuO/TiO₂/natural zeolite by ion exchange/photoreduction method. The composites were further mixed with white cement and latex powder to obtain a zeolite based environmental protection coating. The composition and structure of materials were characterized by XRD, FT-IR, SEM-EDX, N₂ adsorption-desorption, UV-Vis DRS, PL and other tests. The photocatalytic and antibacterial properties of materials were evaluated by methyl orange and escherichia coli, respectively. The results show that the specific surface area of prepared Ag/CuO/TiO₂/natural zeolite composites is 146 m²·g^-1, and the light response range can be extended to 506 nm, which has a low electron-hole pair recombination probability. After 240 min of xenon lamp irradiation, the removal rate of methyl orange is 93.2%, and the antibacterial rate is nearly 100% after 5 min of irradiation.

Key words: Ag/CuO/TiO₂/natural zeolite, environmental protection coating, adsorption, visible light photocatalysis, antibacterial, acid treatment

CLC Number:

YU Qianru, WANG Lipeng, DU Fuling, LIANG Xinchao, LIU Siqi, WANG Cheng. Preparation and Properties of Ag/CuO/TiO₂/Natural Zeolite Based Composites with Visible Light Photocatalytic/Antibacterial Properties[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(12): 4639-4648.

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Preparation and Properties of Ag/CuO/TiO₂/Natural Zeolite Based Composites with Visible Light Photocatalytic/Antibacterial Properties

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