Visible-light-driven photocatalyst based on mineral composite material and preparation method thereof

A technology of composite materials and catalysts, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low compatibility, difficult recovery, secondary pollution, etc., and achieve enhanced adsorption performance, Enhance effective contact and prevent secondary pollution

Active Publication Date: 2021-07-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, the heterojunction composite material has low compatibility in the biological environment, and it is difficult to recycle, and it is easy to cause secondary pollution after being used in the water environment.

Method used

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  • Visible-light-driven photocatalyst based on mineral composite material and preparation method thereof
  • Visible-light-driven photocatalyst based on mineral composite material and preparation method thereof
  • Visible-light-driven photocatalyst based on mineral composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: the preparation of SZK-0.25 composite catalyst:

[0032] 1) Weigh 0.18635g Zn(COOCH 3 ) 2 , 0.2029g SnCl 4 ·5H 2 O, 0.5865g InCl 3 4H 2 O was dissolved in deionized water and stirred for 30 minutes to obtain solution C; weigh 0.3875g CH 3 CSNH 2 and 1g of kaolin were dispersed in deionized water, stirred for 30min to obtain solution D, then solution C was added dropwise to solution D, and continuously stirred for 1h to obtain a suspension;

[0033] 2) Transfer the suspension obtained in step 1) to a reaction kettle, and perform a homogeneous hydrothermal reaction at 160° C. for 12 hours;

[0034] 3) Transfer the reactant obtained in step 2) to a centrifuge tube, centrifuge at 9000rpm for 10min, wash with water and ethanol solution several times, and obtain a yellow precipitate;

[0035] 4) Put the obtained yellow precipitate into an oven, dry it at 70°C for 12 hours, and after cooling to room temperature, the obtained yellow powder is SnS 2 / ZnIn ...

Embodiment 2

[0038] The difference between embodiment 2 and embodiment 1 is that the compound SnCl is changed 4 ·5H 2 O and CH 3 CSNH 2 The amount of SnCl 4 ·5H 2 O and CH 3 CSNH 2 The masses are 0.4057g and 0.4744g respectively so that the SnS in the final composite photocatalyst 2 with ZnIn 2 S 4 The weight ratio of 0.50:1 product obtained is correspondingly marked as SZK-0.50, and all the other reaction steps are the same.

Embodiment 3

[0040] The difference between embodiment 3 and embodiment 1 is that the compound SnCl is changed 4 ·5H 2 O and CH 3 CSNH 2 The amount of SnCl 4 ·5H 2 O and CH 3 CSNH 2 The masses are 0.6085g and 0.5614g respectively so that the SnS in the final composite photocatalyst 2 with ZnIn 2 S 4 The weight ratio is 0.75:1, and the resulting product is correspondingly marked as SZK-0.75, and the rest of the reaction steps are the same.

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Abstract

The invention discloses a visible-light-driven photocatalyst based on a mineral composite material and a preparation method thereof. The visible-light-driven photocatalyst is prepared based on a kaolin material, kaolin is a typical two-dimensional layered mineral and is composed of a silicon-oxygen tetrahedron and an aluminum-oxygen octahedron, rich surface bonding, hydroxyl structures, adsorption sites and micron-sized sizes enable the finally prepared catalyst material to be irregular blocky aggregates, the product size is 1-10 microns, the catalyst has a large specific surface area and active sites, agglomeration of a heterojunction structure can be avoided, and the catalytic degradation efficiency is remarkably improved after the catalyst is in effective contact with pollutants; trace tetracycline hydrochloride with the concentration not larger than 40 ppm can be rapidly treated, and the catalytic efficiency can reach 88.23%.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanocomposite materials, and in particular relates to a visible light catalyst based on mineral composite materials and a preparation method thereof. Background technique [0002] Environmental and energy issues are prominent issues in the 21st century and have attracted widespread attention from people from all walks of life. The issue of water resource shortage is a key concern. Due to the rapid development of industry and industrialization, there are many kinds of pollutants in water bodies, including pesticides and antibiotics. , heavy metals and other various toxins, if they cannot be effectively removed, will pose a serious threat to the survival and development of human beings. In recent years, a variety of processes including membrane filtration, chemical oxidation, physical adsorption and biodegradation have been applied in the water treatment process, but such methods usually face high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J37/10C02F1/30C02F101/38C02F101/34C02F101/36
CPCB01J27/04B01J35/004B01J37/10C02F1/30C02F2305/10C02F2101/38C02F2101/34C02F2101/36
Inventor 王虹李雨禅
Owner CHINA UNIV OF MINING & TECH
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