Preparation method of titanium dioxide-based nanocomposite photocatalyst for rapid removal of phenolic organic pollutants in water
An organic pollutant, titanium dioxide technology, applied in the direction of organic compound/hydride/coordination complex catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the weakening of photocatalyst performance and photocatalyst cycle stability. and other problems, to achieve the effect of enhancing photocatalytic performance, improving photocatalytic performance, and shortening removal time.
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Embodiment 1
[0039] Step S1, Tio 2 Doping metal copper: add 6 mL of tetrabutyl titanate to 15 mL of absolute ethanol under continuous stirring, and after a clear solution is formed, add 9 mL of Cu(NO) dropwise 3 ) 2 Aqueous solution (concentration is 1.8mmol / L); continue to stir for 0.5h, then transfer to a 50mL PTFE-lined stainless steel autoclave, and keep at 120°C for 2h; after the reaction kettle is cooled to room temperature, centrifuge the product, The precipitate was washed with deionized water and ethanol, and the precipitate was dried at 80 °C and further calcined at 500 °C for 4 h; the heating rate was 3 °C / min; after calcination, Cu-TiO was obtained 2 powder;
[0040] Step S2, select the hydroxyquinoline compound as the sensitizer, and the sensitizer should be dissolved in the solvent;
[0041] Step S3, synthesis of composite photocatalyst: a certain amount of Cu-TiO 2 The powder was added to 30 mL of hydroxyquinoline compound solution, and stirred at room temperature for 30...
Embodiment 2
[0043] Step S1, Tio 2 Doping copper metal: Add 8 mL of tetrabutyl titanate to 15 mL of absolute ethanol under continuous stirring, and after a clear solution is formed, add 9 mL of Cu(NO) dropwise 3 ) 2 Aqueous solution (concentration is 0.5mmol / L); continue to stir for 0.5h, then transfer to a 50mL PTFE-lined stainless steel autoclave, and keep it at 80°C for 6h; after the reaction kettle is cooled to room temperature, centrifuge the product, The precipitate was washed with deionized water and ethanol, and the precipitate was dried at 80 °C and further calcined at 400 °C for 5 h; the heating rate was 1 °C / min; after calcination, Cu-TiO was obtained 2 powder;
[0044] Step S2, select the hydroxyquinoline compound as the sensitizer, and the sensitizer should be dissolved in the solvent;
[0045] Step S3, synthesis of composite photocatalyst: a certain amount of Cu-TiO 2 The powder was added to 30 mL of hydroxyquinoline compound solution and stirred at room temperature for 3...
Embodiment 3
[0047] Step S1, Tio 2 Doping metal copper: add 10 mL of tetrabutyl titanate to 15 mL of absolute ethanol under continuous stirring, and after a clear solution is formed, add 9 mL of Cu(NO) dropwise 3 ) 2 Aqueous solution (concentration is 5mmol / L); continue to stir for 0.5h, then transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave, and keep at 150°C for 1h; The precipitate was washed with deionized water and ethanol, dried at 80 °C, and further calcined at 600 °C for 3 h; the heating rate was 5 °C / min; after calcination, Cu-TiO was obtained 2 powder;
[0048] Step S2, select bipyridine as the sensitizer, and the sensitizer should be dissolved in the solvent;
[0049] Step S3, synthesis of composite photocatalyst: a certain amount of Cu-TiO 2 The powder was added to 30 mL of bipyridine solution and stirred at room temperature for 30 min; then, the mixture was transferred to an autoclave and reacted at 200 °C for 3 h; after the precipitate was cooled t...
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