Ternary heterojunction visible light photocatalyst, and preparation method and application thereof
A photocatalyst and visible light technology, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems that the effect needs to be improved and the synthesis method is complicated, so as to improve the photocatalytic performance, the method is simple, The effect of improving photocatalytic activity
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Embodiment 1
[0039] This example is to illustrate the ternary heterojunction visible light photocatalyst BiOI / BiOBr / BiOBr prepared by the preparation method of the present invention 0.5 I 0.5 and apply.
[0040] (1) 2mmolBi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml deionized water to obtain solution A, 1mmolKBr and 1mmolKI were dissolved in 40ml deionized water and ultrasonically dispersed to obtain solution B, the dispersed solution B was added dropwise to solution A, and the After stirring at a rate of 30 min, the solution was transferred to a 100ml polytetrafluoroethylene autoclave for high temperature reaction. Washed three times with water and ethanol, and finally dried at 70 °C for 10 h to obtain the prepared BiOBr 0.5 I 0.5 catalyst of light;
[0041] (2) 2mmolBi(NO 3 ) 3 ·5H 2 O and 1mmol KI were dissolved in 40ml of deionized water, 40ml of ethylene glycol solution with 1mmol of KBr was added, and 0.33g of BiOBr was added after stirring for 30min 0.5 I 0.5 powder, ultraso...
Embodiment 2
[0044] This example is to illustrate the ternary heterojunction visible light photocatalyst BiOI / BiOBr / BiOBr prepared by the preparation method of the present invention 0.5 I 0.5 and apply. According to the preparation method of Example 1, the difference is that in this example, BiOBr 0.5 I 0.5 The amount of photocatalyst is 0.15g, and the specific implementation process is as follows.
[0045] (1) 2mmolBi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml deionized water to obtain solution A, 1mmolKBr and 1mmolKI were dissolved in 40ml deionized water and ultrasonically dispersed to obtain solution B, the dispersed solution B was added dropwise to solution A, and the After stirring at a rate of 30 min, the solution was transferred to a 100ml polytetrafluoroethylene autoclave for high temperature reaction. Washed three times with water and ethanol, and finally dried at 70 °C for 10 h to obtain the prepared BiOBr 0.5 I 0.5 catalyst of light;
[0046] (2) 2mmol Bi(NO 3 ) 3 ·5H ...
Embodiment 3
[0049] This example is to illustrate the ternary heterojunction visible light photocatalyst BiOI / BiOBr / BiOBr prepared by the preparation method of the present invention 0.5 I 0.5 and apply. According to the preparation method of Example 1, the difference is that in this example, BiOBr 0.5 I 0.5 The amount of photocatalyst is 0.5g, and the specific implementation process is as follows.
[0050] (1) 2mmolBi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml deionized water to obtain solution A, 1mmolKBr and 1mmolKI were dissolved in 40ml deionized water and ultrasonically dispersed to obtain solution B, the dispersed solution B was added dropwise to solution A, and the After stirring at a rate of 30 min, the solution was transferred to a 100ml polytetrafluoroethylene autoclave for high temperature reaction. Washed three times with water and ethanol, and finally dried at 70 °C for 10 h to obtain the prepared BiOBr 0.5 I 0.5 catalyst of light;
[0051] (2) 2mmolBi(NO 3 ) 3 ·5H 2 ...
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