Preparation method of graphene/titanium oxide composite visible light photocatalyst
A graphene and visible light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of low solar energy utilization rate, achieve the effect of improving photocatalytic efficiency, simple process, and cheap price
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Embodiment 1
[0022] Take 0.8 mg of graphene oxide (GO) in 30 mL of alcoholic aqueous solution, wherein the ratio of ethanol to deionized water in the alcoholic aqueous solution is 1:2, and ultrasonicate the mixed solution for 1 h. After the sonication, slowly add 0.2mL TiCl dropwise to the solution while stirring 4 solution. After the dropwise addition, the solution was continued to be magnetically stirred for 1 h. After the stirring was completed, the solution was transferred to a hydrothermal reaction kettle, reacted at 110° C. for 3 hours, cooled, filtered, washed, and dried to obtain the prepared catalyst. Pour a certain amount of prepared catalyst into a colorimetric tube, and add two drops with a concentration of 0.02mmol·L -1 The methylene blue solution was stirred in the dark for 60 minutes to reach the equilibrium of adsorption and desorption, then the tungsten halogen lamp (500W, and filter the ultraviolet light with a specific glass) was used as the light source for illuminati...
Embodiment 2
[0024] Take 5 mg of graphene oxide (GO) in 90 mL of alcoholic aqueous solution, wherein the ratio of ethanol to deionized water in the alcoholic aqueous solution is 4:5, and ultrasonicate the mixed solution for 1 h. After the sonication, slowly add 1.2mL TiCl dropwise to the solution while stirring 4 solution. After the dropwise addition, the solution was continued to be magnetically stirred for 2 h. After the stirring was completed, the solution was transferred to a hydrothermal reaction kettle, reacted at 120° C. for 5 hours, cooled, filtered, washed, and dried to obtain the prepared catalyst. Pour a certain amount of prepared catalyst into a colorimetric tube, and add two drops with a concentration of 0.02mmol·L -1 The methylene blue solution was stirred in the dark for 60 minutes to reach the equilibrium of adsorption and desorption, then the tungsten halogen lamp (500W, and filter the ultraviolet light with a specific glass) was used as the light source for illumination...
Embodiment 3
[0026] Take 5 mg of graphene oxide (GO) in 120 mL of aqueous alcohol solution, where the ratio of ethanol to deionized water in the aqueous alcohol solution is 4:5, and ultrasonicate the mixed solution for 1 h. After the sonication, slowly add 1.2mL TiCl dropwise to the solution while stirring 4 solution. After the dropwise addition, the solution was continued to be magnetically stirred for 4 h. After the stirring was completed, the solution was transferred to a hydrothermal reaction kettle, reacted at 130° C. for 8 hours, cooled, filtered, washed, and dried to obtain the prepared catalyst. Pour a certain amount of the prepared catalyst into a colorimetric tube, and add two drops with a concentration of 0.02mmol·L -1 The methylene blue solution was stirred in the dark for 60 minutes to reach the equilibrium of adsorption and desorption, then the tungsten halogen lamp (500W, and filter the ultraviolet light with a specific glass) was used as the light source for illumination,...
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