Graphene supported BiOBrxI(1-x) microsphere composite photocatalyst as well as preparation method and application thereof
A technology of graphene and composite light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of promoting separation and transfer, simple and easy-to-operate preparation methods, and mild reaction conditions
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[0028] Please refer to figure 1 , The embodiment of the present invention provides a graphene loaded BiOBr x I 1-x The preparation method of the microsphere composite photocatalyst includes the following steps:
[0029] Step S1: Weigh a certain quality of industrial grade RGO and place it in an appropriate amount of the first organic solvent, and ultrasonically disperse to obtain suspension A; wherein the amount of reduced graphene is BiOBr x I 1-x 0.1% to 5% of the mass; the value of x is 0 to 1; the first organic solvent is any one of absolute ethanol, n-propanol or n-butanol; the preparation process of RGO is: weigh 100 mg of graphite oxide Dissolve in 100mL N,N-dimethylformamide / water mixed solution with a volume ratio of 9:1, sonicate for 30min to form a uniform dispersion, add 1g hydrazine hydrate, reduce at 100℃ for 6h, and finally use Wash with ethanol and distilled water to obtain highly active reduced graphene;
[0030] Step S2, accurately weigh out an appropriate amount ...
Embodiment 1
[0035] Weigh 5mg RGO in 20mL absolute ethanol and disperse ultrasonically for 1h; accurately weigh 1.4552g Bi(NO 3 ) 3 ·5H 2 O (3mmol) is dissolved in 35mL of ethylene glycol (EG), after it is dissolved, slowly drip into the solution containing 5mL of EG (3mmol KI moistened with a small amount of water) under continuous stirring, and then the dispersed well RGO was slowly added dropwise to the above solution. After stirring for 1 hour, it was transferred to a 100mL autoclave with a polytetrafluoroethylene liner, sealed and placed in a temperature-programmed drying oven at 160°C for 12 hours. After it cooled, pumped The product was filtered and washed with deionized water and absolute ethanol three times to wash off the excess reactants on the surface. Finally, the product was placed in a vacuum drying oven and dried at 60°C for 12 hours to obtain a graphene-supported BiOI microsphere composite photocatalyst , Grinding spare.
[0036] The graphene-supported BiOI microsphere compos...
Embodiment 2
[0038] Weigh 5mg RGO in 20mL absolute ethanol and disperse ultrasonically for 1h; accurately weigh 1.4552g Bi(NO 3 ) 3 ·5H 2 O (3mmol) was dissolved in 35mL EG, after it was dissolved, slowly dripped into the 5mL EG (contains 0.6mmol KBr and 2.4mmol KI) solution under continuous stirring, and then slowly added the dispersed RGO to the above In the solution, continue to stir for 1h, then transfer it to a 100mL autoclave with a polytetrafluoroethylene liner, seal it and place it in a temperature-programmed drying box for reaction at 160℃ for 12h. After it cools, suction filter to obtain the product. Deionized water and absolute ethanol were washed three times each to wash off the excess reactants on the surface. Finally, the product was placed in a vacuum drying oven and dried at 60°C for 12 hours to obtain graphene-supported BiOBr 0.2 I 0.8 Microsphere composite photocatalyst, grinding for use.
[0039] Using the graphene-supported BiOBr prepared in Example 2 0.2 I 0.8 The degradat...
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