A kind of cadmium sulfide/nickel tungstate composite visible light catalyst, preparation method and application
A technology of nickel tungstate and catalyst, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high electron-hole recombination rate and low photocatalytic activity of pure nickel tungstate , to achieve good stability, excellent photocatalytic activity, and strong light absorption range
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Embodiment 1
[0025] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .
[0026] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.018432g cadmium acetate, continue ultrasonication for 1h, then add 0.0052g s...
Embodiment 2
[0028] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .
[0029] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.036864g cadmium acetate, continue ultrasonication for 1h, then add 0.0104g s...
Embodiment 3
[0031] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .
[0032] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.055296g cadmium acetate, continue ultrasonication for 1h, then add 0.0156g s...
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