Method for in-situ generation of BiVO4/Bi2O3 heterojunction and photocatalytic application of the BiVO4/Bi2O3 heterojunction
An in-situ generation and photocatalytic technology, applied in the field of photocatalytic materials, can solve the problems of small heterojunction interface area, large heterojunction interface area, and good photocatalytic performance, and achieve low cost, large interface area, photocatalytic The effect of high catalytic performance
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Embodiment 1
[0015] Step 1: Weigh 2.428 g of bismuth nitrate pentahydrate, dissolve it in 10 ml of 4.0 mol / L nitric acid aqueous solution, then add 0.255 g of sodium dodecyl benzene sulfonate, stir well; then weigh 0.589 g of vanadium Ammonium acid, dissolve it in 10 ml of 2.0 mol / L sodium hydroxide aqueous solution, mix the above two solutions and stir uniformly. Then, a 2.0 mol / liter sodium hydroxide aqueous solution was added dropwise to the mixed solution until the pH of the mixed solution was 7.0. Pour the mixed solution into a 100 ml autoclave, keep it at 200 degrees Celsius for 90 minutes, cool to room temperature, centrifuge to separate the yellow precipitate, and wash it with absolute ethanol and deionized water. Then dry in a vacuum drying oven at 60 degrees Celsius for 12 hours to obtain BiVO 4 Nanosheets.
[0016] Step 2: Weigh 25 mg BiVO 4 , Add 1 ml of absolute ethanol, ultrasonically disperse uniformly, then add 30 microliters of 5% naphthol solution, ultrasonically disperse t...
Embodiment 2
[0018] The steps are the same as step one in Example 1.
[0019] Step 2: Weigh 25 mg BiVO 4 , Add 1 ml of absolute ethanol, ultrasonically disperse uniformly, then add 30 microliters of 5% naphthol solution, ultrasonically disperse to form a uniform slurry, drip all the slurry on the surface of 20 by 20 square millimeter glassy carbon, after drying Place it in 1 mol / L potassium hydroxide aqueous solution, and irradiate the glassy carbon coated with catalyst with xenon lamp ultraviolet light for 40 minutes to obtain BiVO 4 / Bi 2 O 3 sample.
Embodiment 3
[0021] The steps are the same as step one in Example 1.
[0022] Step 2: Weigh 25 mg BiVO 4 , Add 1 ml of absolute ethanol, ultrasonically disperse uniformly, then add 30 microliters of 5% naphthol solution, ultrasonically disperse to form a uniform slurry, all the slurry is dripped on the surface of 20 times 20 square millimeter glassy carbon, and dried Then it was placed in 1 mol / L potassium hydroxide aqueous solution, and the glassy carbon coated with the catalyst was irradiated with xenon lamp ultraviolet light for 20 minutes to obtain BiVO 4 / Bi 2 O 3 sample.
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