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Preparation method of Fe-BiOBr/MOF-SO3@TiO2 photocatalyst

A MOF-SO3, photocatalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of low utilization of light energy, easy decomposition of harmful substances Material, instability and other problems, to achieve the effect of large specific surface area, conducive to degradation, high crystallinity

Inactive Publication Date: 2018-04-06
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic degradation has become a research hotspot in the treatment of organic pollutants because of its advantages such as mild reaction conditions, no secondary pollution, and direct use of solar energy; the problem in the prior art is that traditional equal-bandgap photocatalysts often only It can absorb and utilize ultraviolet light, which accounts for a small proportion of sunlight, and has low utilization rate of light energy, while narrow-bandgap photocatalysts such as cadmium sulfide are usually unstable and easy to decompose harmful substances

Method used

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  • Preparation method of Fe-BiOBr/MOF-SO3@TiO2 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. A Fe-BiOBr / MOF-SO 3 @TiO 2 The preparation method of photocatalyst is characterized in that the method comprises the following steps:

[0013] Step 1 weighed 4.8gBi (NO 3 ) 3 ·5H 2 O, 0.8gFeCl 3 ·6H 2 O and 8.0 g MOF-SO 3 @TiO 2 Dissolve the nanomaterial in 35ml of ethylene glycol, then weigh 0.5gNaBr and slowly add it to the above solution, stir until it is completely dissolved, add 0.4gPVP to it, stir evenly and then ultrasonically oscillate for 30min;

[0014] Step 2. Transfer the above shaken solution to a 50ml polytetrafluoroethylene autoclave, react at 160°C for 6h, wash with deionized water three times to remove excess ions and other impurities in the precipitate, and wash with absolute ethanol Three times to remove residual organic matter, after washing, place it in an air-dried oven at 80°C for 6 hours to obtain nano-photocatalyst Fe-BiOBr / MOF-SO 3 @TiO 2 .

[0015] The MOF-SO 3 @TiO 2 Nanomaterial preparation method is as follows:

[0016] Ste...

Embodiment 2

[0019] Step 1 weighed 2.4gBi (NO 3 ) 3 ·5H 2 O, 0.8gFeCl 3 ·6H 2 O and 8.0 g MOF-SO 3 @TiO 2 Dissolve the nanomaterial in 35ml of ethylene glycol, then weigh 0.5gNaBr and slowly add it to the above solution, stir until it is completely dissolved, add 0.4gPVP to it, stir evenly and then ultrasonically oscillate for 30min;

[0020] All the other steps are the same as in Example 1.

Embodiment 3

[0022] Step 1 Weigh 1.2gBi (NO 3 ) 3 ·5H 2 O, 0.8gFeCl 3 ·6H 2 O and 8.0 g MOF-SO 3 @TiO 2 Dissolve the nanomaterial in 35ml of ethylene glycol, then weigh 0.5gNaBr and slowly add it to the above solution, stir until it is completely dissolved, add 0.4gPVP to it, stir evenly and then ultrasonically oscillate for 30min;

[0023] All the other steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a Fe-BiOBr / MOF-SO3@TiO2 photocatalyst. Bi(NO3)3 5H2O, FeCl3 6H2O, MOF-SO3@TiO2 nanomaterials, NaBr, TiO2 and N-N-dimethylacetamide serve as the main rawmaterials, preparation is conducted by means of an improved solvothermal method and an ultrasonic method, FeCl3 6H2O is added, Fe<9+> is introduced, the Fe<9+> is migrated into a crystal lattice of BiOBr to form a defect, the forbidden bandwidth of the catalyst is changed, and then separation of a photo-induced electron and a hole is promoted, and the oxidation activity is improved. Accordingly,the preparation technology is novel, a good visible light degradation effect is achieved, the cost can be lowered, pollution can be reduced, and the good application prospect and economic benefit areachieved in the aspect of organic pollutant decomposition.

Description

technical field [0001] The present invention relates to a kind of Fe-BiOBr / MOF-SO 3 @TiO 2 A photocatalyst and a preparation method thereof belong to the technical field of catalysts. Background technique [0002] Photocatalytic technology refers to the catalyst that converts light energy into the energy required for chemical reactions under light conditions, and then produces catalytic action. It is a new type of high-efficiency energy-saving and environmental protection technology. Photocatalytic degradation is the use of light radiation to generate active free radicals in the reaction system, and decompose organic pollutants into non-toxic or low-toxic inorganic substances through processes such as addition, substitution, and electron transfer with organic pollutants. Photocatalytic degradation has become a research hotspot in the treatment of organic pollutants because of its advantages such as mild reaction conditions, no secondary pollution, and direct use of solar e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28
CPCB01J31/28B01J35/39
Inventor 蔡廷栋
Owner XUZHOU NORMAL UNIVERSITY
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