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