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Photocatalytic composite material and preparation method thereof

A composite material and photocatalysis technology, which is applied in the field of photocatalytic composite materials and preparation, can solve the problems of low catalytic efficiency of photocatalytic materials, achieve the effects of large specific surface area, simple preparation, and enhanced absorption capacity

Inactive Publication Date: 2021-08-24
武汉梓强生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a photocatalytic composite material and its preparation method, which solves the technical problem of low catalytic efficiency of traditional photocatalytic materials

Method used

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  • Photocatalytic composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method of preparing a photocatalytic composite, comprising the steps of:

[0025] S1: 0.233 g of zirconium chloride and 0.181 g 2-amino group terephthalic acid were added to 50 ml of DMF solution, and mixed mixed with mixed liquid, then transferred to the polytetrafluoroethylene reaction kettle, performed at 120 ° C After 48 h, after the reaction is completed, the reaction product is centrifted, washed, dried to give a three-dimensional MOF material UIO-66-NH. 2 ;

[0026] S2: 0.133 g of cadmium acetate and 0.439 g of zinc acetate, stirred evenly, and then 0.03 g of UIO-66-NH prepared by step S12 To the solution was added the above-described ultrasound for half an hour, stir, and then added dropwise 10mL0.3mol / L sodium sulfide solution, stirred and mixed uniformly to obtain a mixture, and then transferred the mixture to a Teflon autoclave, at 160 ℃ hydrothermal reaction 4h, after the completion of the reaction, the reaction product was centrifuged, washed, and dried, to...

Embodiment 2

[0029] A method of preparing a photocatalytic composite, comprising the steps of:

[0030] S1: zirconium chloride was added 0.233g and 0.181g 2- 50mL DMF solution to the amino terephthalic acid, uniformly stirred and mixed to obtain a mixture, and then transferred the mixture to a Teflon autoclave, subjected to hydrothermal 120 ℃ thermal reaction 48h, after the completion of the reaction, the reaction product was centrifuged, washed, and dried, to obtain a three-dimensional MOF material UiO-66-NH 2 ;

[0031] S2: 30mL of ethylene glycol was added to the solution 0.133g 0.439g zinc acetate and cadmium acetate, stirred uniformly, and then the step S1 is prepared 0.06g UiO-66-NH 2 To the solution was added the above-described ultrasound for half an hour, stir, and then added dropwise 10mL0.3mol / L sodium sulfide solution, stirred and mixed evenly to give mixture was then transferred to a teflon reaction vessel mixture was carried out at 160 ℃ hydrothermal reaction 4h, after the comp...

Embodiment 3

[0034] A method of preparing a photocatalytic composite, comprising the steps of:

[0035] S1: zirconium chloride was added 0.233g and 0.181g 2- 50mL DMF solution to the amino terephthalic acid, uniformly stirred and mixed to obtain a mixture, and then transferred the mixture to a Teflon autoclave, subjected to hydrothermal 120 ℃ thermal reaction 48h, after the completion of the reaction by centrifugation, washed, and dried, to obtain a three-dimensional MOF material UiO-66-NH 2 ;

[0036] S2: 30mL of ethylene glycol was added to the solution 0.133g 0.439g zinc acetate and cadmium acetate, stirred uniformly, and then the step S1 is prepared 0.09g UiO-66-NH 2 To the solution was added the above-described ultrasound for half an hour, stir, and then added dropwise 10mL0.3mol / L sodium sulfide solution, stirred and mixed evenly to give mixture was then transferred to a teflon reaction vessel mixture was carried out at 160 ℃ hydrothermal reaction 4h, after the completion of the reacti...

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Abstract

The invention discloses a photocatalytic composite material and a preparation method thereof. The preparation method comprises the three steps of preparation of a UiO-66-NH2 material, preparation of a UiO-66-NH2-CdZnS material and preparation of a UiO-66-NH2-CdZnS-CoP3 material. The cocatalyst CoP3 adopted by the photocatalytic composite material has the advantages of being easy to prepare and low in cost compared with a traditional precious metal cocatalyst; CoP3 particles provide a large number of photocatalytic reaction active sites in the composite material, the reaction potential is reduced, and photocatalytic water splitting is promoted; meanwhile, the highly dispersed CoP3 nanoparticles further enhance separation of electron-hole pairs, and the migration rate of photo-induced electrons is increased, so that water molecules adsorbed on the surface of the UiO-66-NH2 quickly react with the photo-induced electrons to prepare hydrogen; in addition, the three-dimensional UiO-66-NH2 is taken as the carrier, the problems that a photocatalyst is lost and is not easy to recover in the use process are effectively avoided, the use range is expanded, and the obtained composite material has excellent photocatalytic hydrogen production capacity.

Description

Technical field [0001] The present invention relates to the field of photocatalytic techniques, and more particularly to a photocatalytic composite material and a preparation method. Background technique [0002] Photocatalytic decomposition water preparation h 2 Solar energy can be converted into hydrogen energy, which is an effective way to solve energy crises and environmental issues. Although it has been pioneered in 1972, it has been pioneered to disclose water. After decades of development, a large number of semiconductor materials have been developed to photocatalytic hydrogen production, but one of the main challenges of photocatalytic hydrogen production is A highly efficient visible light response photocatalyst is developed, and therefore, a photocatalyst having sufficient charge separation capability, highlight catalytic activity, and stability to meet the actual application needs is still a difficult task. [0003] Semiconductor materials are widely used in the photoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C01B3/04
CPCB01J31/2243C01B3/042B01J2531/48C01B2203/0277C01B2203/1052C01B2203/1076C01B2203/1094B01J35/39Y02E60/36
Inventor 李丽坤张蓉李娇任嵬
Owner 武汉梓强生态科技有限公司
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