Bi2MoO6Ag2CrO4 heterojunction, preparation method of Bi2MoO6Ag2CrO4 heterojunction and application of Bi2MoO6Ag2CrO4 heterojunction as photocatalytic material
A technology of heterojunction, bismuth nitrate pentahydrate, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that photogenerated holes and electrons are easy to recombine, The problems of general photocatalytic effect and weak surface adsorption ability can achieve the effect of promoting photocatalytic performance, low cost and strong repeatability
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Embodiment 1
[0025] A Bi 2 MoO 6 / Ag 2 CrO 4 A method for preparing a heterojunction, comprising the following steps:
[0026] S1: Preparation of Bi by hydrothermal method 2 MoO 6 : Weigh 2.42g of bismuth nitrate pentahydrate and dissolve it in 30 mL of deionized water, stir and sonicate at room temperature for 20 min each to obtain suspension A, weigh 1.493 g of ammonium molybdate tetrahydrate and dissolve it in 100 mL of water as solution B. Measure 30mL of the solution and add it dropwise to Solution A at a rate of 1 mL / min under magnetic stirring. After adding ammonia water (NH 3 ·H 2 O) After adjusting the pH value of the mixed solution to 6, it was quickly transferred to an autoclave at 135°C for 13 h, cooled, centrifuged, washed with ethanol and deionized water for 3 times, and vacuum-dried at 75°C for 13 h to obtain Bi 2 MoO 6 ;
[0027] S2: Preparation of a heterojunction photocatalyst with 10 wt% silver chromate: Weigh 895.67 mg of prepared bismuth molybdate and disperse...
Embodiment 2
[0029] A Bi 2 MoO 6 / Ag 2 CrO 4 A method for preparing a heterojunction, comprising the following steps:
[0030] S1: Preparation of Bi by hydrothermal method 2 MoO 6: Weigh 6.79g of bismuth nitrate pentahydrate and dissolve it in 30 mL of deionized water, stir and sonicate at room temperature for 40 min each to obtain suspension A, weigh 1.236 g of ammonium molybdate tetrahydrate and dissolve it in 100 mL of water as solution B. Measure 30mL of the solution and add it dropwise to solution A at a rate of 3 mL / min under magnetic stirring. After adding ammonia water (NH 3 ·H 2 O) After adjusting the pH value of the mixed solution to 6, it was quickly transferred to an autoclave at 145°C for 11 h, cooled, centrifuged, and the lower precipitate was washed twice with ethanol and deionized water, and vacuum-dried at 85°C for 11 h to obtain Bi 2 MoO 6 ;
[0031] S2: Preparation of a heterojunction photocatalyst with 30 wt% silver chromate: Weigh 696.63 mg of the prepared bis...
Embodiment 3
[0033] A Bi 2 MoO 6 / Ag 2 CrO 4 A method for preparing a heterojunction, comprising the following steps:
[0034] S1: Preparation of Bi by hydrothermal method 2 MoO 6 : Weigh 4.41g of bismuth nitrate pentahydrate and dissolve it in 30 mL of deionized water, stir and sonicate at room temperature for 30 min each to obtain suspension A, weigh 1.236 g of ammonium molybdate tetrahydrate and dissolve it in 100 mL of water as solution B. Measure 30mL of the solution and add it dropwise to solution A at a rate of 3 mL / min under magnetic stirring. After adding ammonia water (NH 3 ·H 2 O) After adjusting the pH value of the mixed solution to 6, it was quickly transferred to an autoclave at 140°C for 12 h, cooled, centrifuged, washed with ethanol and deionized water for 3 times, and vacuum-dried at 80°C for 12 h to obtain Bi 2 MoO 6 ;
[0035] S2: Preparation of a heterojunction photocatalyst with 50 wt% silver chromate: Weigh 199.04 mg of the prepared bismuth molybdate and disp...
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