Preparation method of nitrogen-doped titanium dioxide nanoribbon visible light photocatalyst
A technology of titanium dioxide and photocatalyst, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high heat treatment temperature, complicated steps, difficult control, etc., and achieve simple doping form, The synthesis method is simple and easy, and the synthesis process is easy
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Embodiment 1
[0028] (1) Preparation of titanium dioxide nanotubes 3g of titanium dioxide P-25 was added to 30mL of 2mol / L sodium hydroxide solution and stirred for 24 hours to obtain a suspension; the suspension was filled into a polytetrafluoroethylene liner Put it in a stainless steel reaction kettle and react in an oven at 120°C for 72 hours. After centrifugation, a white solid is obtained. The white solid is washed with 60 mL of deionized water to neutrality (PH=7) to obtain a water-washed solid. Add the water-washed solid to 50 mL of 0. Stir in 1mol / L hydrochloric acid for 5 hours, wash with 45mL deionized water until neutral (PH=7), then wash 3 times with 50mL absolute ethanol, centrifuge to obtain a white solid, dry at 60°C to obtain 2.6g white solid , it can be seen from the transmission electron microscope that the white solid after drying is a clear tubular structure, that is, titanium dioxide nanotubes (see figure 1 );
[0029] (2) Immerse 2 g of titanium dioxide nanotubes obta...
Embodiment 2
[0032] (1) Preparation of titanium dioxide nanotubes Add 5 g of titanium dioxide P-25 to 62.5 mL of 1 mol / L sodium hydroxide solution and stir for 4 hours to obtain a suspension; put the suspension into a polytetrafluoroethylene lining placed in a 60°C oven to react for 24 hours, centrifuged to obtain a white solid, washed the white solid with 60mL deionized water until neutral (PH=7), and obtained a water-washed solid, which was added to 50mL. Stir in 1mol / L hydrochloric acid for 2 hours, wash with 45mL deionized water until neutral (PH=7), then wash 3 times with 50mL absolute ethanol, centrifuge to obtain a white solid, dry at 30°C to obtain a white solid, From the transmission electron microscope photos, it can be seen that the white solid after drying is a clear tubular structure, that is, titanium dioxide nanotubes;
[0033] (2) Immerse 2 g of titanium dioxide nanotubes obtained in step (1) in 50 mL of 0.1 mol / L ammonia water for 12 hours, filter to obtain a white solid, ...
Embodiment 3
[0036] (1) Preparation of titanium dioxide nanotubes Add 2g of titanium dioxide P-25 to 150mL of sodium hydroxide solution with a concentration of 15mol / L and stir for 24 hours to obtain a suspension; put the suspension into a Teflon-lined container In a stainless steel reaction kettle, place it in an oven at 240°C for 72 hours, and centrifuge to obtain a white solid. Wash the white solid with 60mL deionized water to neutrality (PH=7) to obtain a water-washed solid. Add the water-washed solid to 50mL3mol / Stir in 1 L of hydrochloric acid for 9 hours, wash with 45mL deionized water to neutrality (PH=7), then wash 3 times with 50mL absolute ethanol, then centrifuge, and dry at 100°C to obtain a white solid, which can be obtained from the transmission electron microscope photos It can be seen that the white solid after drying is a clear tubular structure, that is, titanium dioxide nanotubes;
[0037] (2) Immerse 1.8 g of titanium dioxide nanotubes obtained in step (1) in 50 mL of...
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