Photo-assisted preparation method of Pt/BiVO4/Bi2O3 catalyst and photoelectrocatalysis application of Pt/BiVO4/Bi2O3 catalyst
A catalyst, light irradiation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of insufficient contact, small heterojunction interface area, etc. problem, to achieve the effect of low cost, large interface area and high photoelectric catalytic performance
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Embodiment 1
[0019] Step 1: Take 2.428 grams of bismuth nitrate pentahydrate, dissolve it in 10 milliliters of 4.0 mol / liter nitric acid aqueous solution, add 0.255 grams of sodium dodecylbenzenesulfonate, and stir evenly; then weigh 0.589 grams of vanadium metabolite ammonium hydroxide, which was dissolved in 10 milliliters of 2.0 mol / liter sodium hydroxide aqueous solution, and the above two solutions were mixed and stirred evenly. Then 2.0 mol / L aqueous sodium hydroxide solution was added dropwise into the mixed solution until the pH of the mixed solution was 7.0. Pour the mixed solution into a 100 ml autoclave, keep it warm at 200°C for 90 minutes, cool to room temperature, centrifuge the yellow precipitate, and wash it with absolute ethanol and deionized water. Then dry in a vacuum oven at 60°C for 12 hours to obtain BiVO 4 powder.
[0020] Step 2: Weigh 190 mg of BiVO obtained in Step 1 4 powder and add it to 30 ml of ultrapure water, ultrasonically disperse for 10 minutes, then a...
Embodiment 2
[0023] Steps 1 and 2 are the same as Steps 1 and 2 in Example 1.
[0024] Step 3: Take 5 mg of Pt / BiVO obtained in Step 2 4And 1 mg of activated carbon powder, add 1 ml of absolute ethanol, ultrasonically disperse evenly, then add 30 μl of 5% naphthol solution, ultrasonically disperse to form a uniform slurry, take 10 μl of slurry and drop-coat it on a 5 mm diameter After drying, put it in 1 mol / L potassium hydroxide aqueous solution, and irradiate the glassy carbon electrode coated with the catalyst with xenon lamp ultraviolet light for 40 minutes to obtain Pt / BiVO 4 / Bi 2 o 3 sample.
Embodiment 3
[0026] Steps 1 and 2 are the same as Steps 1 and 2 in Example 1.
[0027] Step 3: Take 5 mg of Pt / BiVO obtained in Step 2 4 And 1 mg of activated carbon powder, add 1 ml of absolute ethanol, ultrasonically disperse evenly, then add 30 μl of 5% naphthol solution, ultrasonically disperse to form a uniform slurry, take 10 μl of slurry and drop-coat it on a 5 mm diameter On the glassy carbon electrode, after drying, place it in 1 mol / L potassium hydroxide aqueous solution, irradiate the glassy carbon electrode coated with the catalyst with xenon lamp ultraviolet light for 60 minutes, and obtain Pt / BiVO 4 / Bi 2 o 3 sample.
[0028] The steps of the comparative example are the same as steps 1 and 2 in Example 1.
[0029] Step 2: 4 mmol of bismuth nitrate pentahydrate was dissolved in 50 ml of dimethylformamide solution, and after stirring for 2 hours, the mixed solution was poured into a 100 ml autoclave, and kept at 180° C. for 12 hours. After cooling to room temperature, the ...
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