A kind of composite photocatalyst and preparation method thereof
A photocatalyst and composite technology, which is applied in the field of catalyst preparation and sustainable development of environment and energy, and achieves the effects of low cost, high catalytic efficiency and simple preparation method
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Embodiment 1
[0028] Blank TiO 2 Preparation of:
[0029] 5 ml n-tetrabutyl titanate (Ti(OBu) 4 ) and 1 ml of hydrofluoric acid (HF) were mixed and stirred evenly, then transferred to a 50 ml reactor, heated in water at 180 °C for 24 h, then centrifuged, washed, and dried to obtain TiO 2Nanosheets.
[0030] 10 mg TiO 2 Nanosheet photocatalyst and 60 mg ammonium formate were added to 40 ml of 10 mg / l p-nitroaniline solution, stirred for 1 h under dark conditions, and nitrogen gas (80 ml / min) was introduced to remove the air in the solution, After reaching adsorption equilibrium, it was irradiated under UV-visible light. Every 4 min, 2 ml of the solution was taken out from the reaction solution, and analyzed by UV-Vis spectrophotometer and liquid chromatography.
Embodiment 2
[0032] TiO 2 -Bi 2 WO 6 Preparation of:
[0033] 5 ml n-tetrabutyl titanate (Ti(OBu) 4 ) and 1 ml of hydrofluoric acid (HF) were mixed and stirred evenly, then transferred to a 50 ml reactor, heated in water at 180 °C for 24 h, then centrifuged, washed, and dried to obtain TiO 2 Nanosheets. The prepared TiO 2 Nanosheets (40 mg) and 2 ml 3-aminopropyltriethoxysilane (APTES) were dispersed in 200 ml ethanol, refluxed at 60 °C for 4 h, then centrifuged, washed, and dried to obtain positively charged TiO 2 Nanosheets. 1 mmol sodium tungstate (Na 2 WO 4 2H 2 O), 2 mmol bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O and 0.05 g of cetyltrimethylammonium bromide (CTAB) were added to 80 ml of distilled water, mixed and stirred evenly, then transferred to a 100 mL reactor, heated at 120 °C for 24 h, then centrifuged, washed and dried to obtain Bi 2 WO 6 Nanosheets. Ultrasonic dispersion of uniform Bi 2 WO 6 The aqueous solution of nanosheets (4 ml 0.5 mg / ml) was slowly added drop...
Embodiment 3
[0036] Au-TiO 2 -Bi 2 WO 6 Preparation of:
[0037] 5 ml n-tetrabutyl titanate (Ti(OBu) 4 ) and 1 ml of hydrofluoric acid (HF) were mixed and stirred evenly, then transferred to a 50 ml reactor, heated in water at 180 °C for 24 h, then centrifuged, washed, and dried to obtain TiO 2 Nanosheets. The prepared TiO 2 Nanosheets (40 mg) and 2 ml 3-aminopropyltriethoxysilane (APTES) were dispersed in 200 ml ethanol, refluxed at 60 °C for 4 h, then centrifuged, washed, and dried to obtain positively charged TiO 2 Nanosheets. 1 mmol sodium tungstate (Na 2 WO 4 2H 2 O), 2 mmol bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O and 0.05 g of cetyltrimethylammonium bromide (CTAB) were added to 80 ml of distilled water, mixed and stirred evenly, then transferred to a 100 mL reactor, heated at 120 °C for 24 h, then centrifuged, washed and dried to obtain Bi 2 WO 6 Nanosheets. 26 ml of 2.8 mM sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) solution was added to 50 ml 0.4 mM chloroauric acid (...
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