Method for preparing composite photocatalyst at low temperature
A technology of catalyst and composite light, applied in the field of nano-photocatalysis, can solve the problems of low activity of visible light photocatalytic materials, complex process equipment, difficult industrial production, etc., and achieve the effect of rich exposure, simple process and easy control
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Embodiment 1
[0027] A kind of low temperature preparation method of composite photocatalyst of the present embodiment is as follows:
[0028] Add 2.2mL (0.02mol) titanium tetrachloride to 38mL deionized water and mix uniformly to form a titanium tetrachloride solution with a mass concentration of 9%, then add 0.5mol / L aqueous sodium hydroxide solution to adjust the pH value at about 5, and After the obtained sol was kept at 60°C for 12 hours, deionized water 5 times its mass was added to the system to dissolve it, and 10 mL of 2 mmol silver nitrate aqueous solution was added dropwise to the above system, and stirred for 12 hours to obtain a precipitate. The precipitate was washed three times with ethanol and water, and dried at 100° C. to obtain a silver / silver chloride / titanium dioxide powder material.
Embodiment 2
[0030] A kind of low temperature preparation method of composite photocatalyst of the present embodiment is as follows:
[0031] Add 2.2mL (0.02mol) titanium tetrachloride to 38mL deionized water and mix uniformly to form titanium tetrachloride aqueous solution, then add 0.5mol / L sodium hydroxide aqueous solution to adjust the pH value at about 6, and the obtained sol is at 80 After incubating at ℃ for 12 hours, add 8 times the mass of deionized water to the system to dissolve, then add 10 mL of 4 mmol silver nitrate aqueous solution to the above system dropwise, and stir for 12 hours to obtain a precipitate. The precipitate was washed three times with ethanol and water, and dried at 80° C. to obtain a silver / silver chloride / titanium dioxide powder material.
Embodiment 3
[0033] A kind of low temperature preparation method of composite photocatalyst of the present embodiment is as follows:
[0034] Add 1.1mL (0.01mol) titanium tetrachloride to 30mL dehydrated alcohol and form the ethanolic solution of titanium tetrachloride after uniform mixing, then add 0.5mol / L sodium hydroxide aqueous solution to adjust the pH value at about 5, and obtain After the sol was kept at 80°C for 2 hours, deionized water 10 times its mass was added to the system to dissolve it, and 10 mL of 4 mmol silver nitrate aqueous solution was added dropwise to the above system, and stirred for 12 hours to obtain a precipitate. The precipitate was washed three times with ethanol and water, and dried at 80° C. to obtain a silver / silver chloride / titanium dioxide powder material.
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