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Nano photocatalyst for environment purification and preparation method thereof

A nano-photocatalyst, nano-crystal technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. Recycling difficulties and other problems, to achieve the effect of wide visible light response range, low price, easy large-area assembly and miniaturization

Active Publication Date: 2018-05-04
湖州达立智能设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide has a large band gap and has no absorption properties for visible light mainly composed of sunlight, and is not active in visible light
[0003] Organic photocatalyst is a new type of photocatalyst, which has a molecular structure that is easy to tailor, and the energy band structure can be adjusted by simple means such as molecular structure functional group modification. It has a wider spectral response range and has a good response to visible light bands and even infrared bands. advantages, but it is difficult to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a nano photocatalyst, comprising the steps of:

[0025] 1) Preparation of ternary sulfide nanocrystals: 100g TiCl 4 , 70g FeCl 3 , and 50g (NH4) 2 S was mixed with 200 g of ethylenediamine, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature was 150° C., and the reaction time was 20 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals were separated;

[0026] 2) Surface modification of ternary sulfide nanocrystals: Disperse 90 g of ternary sulfide nanocrystals prepared in step 1) in 270 g of ethanol, then add 30 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 2 hours, then centrifuge, then wash with ether and ethyl acetate for 5 times, and finally dry in a vacuum oven at 60°C for 12 hours;

[0027] 3) Preparation of photocatalyst: Disperse 90 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 270 g of dimethyl sulfoxide, and ad...

Embodiment 2

[0031] A method for preparing a nano photocatalyst, comprising the steps of:

[0032] 1) Preparation of ternary sulfide nanocrystals: 100g TiCl 4 , 70g FeCl 3 , and 50g (NH4) 2 S was mixed with ethylenediamine 230g, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature was 180°C, the reaction time was 23 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals were separated;

[0033] 2) Surface modification of ternary sulfide nanocrystals: Disperse 120 g of ternary sulfide nanocrystals prepared in step 1) in 300 g of ethanol, then add 40 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 3 hours, then centrifuge, then wash with ether and ethyl acetate for 6 times, and finally dry in a vacuum oven at 70°C for 14 hours;

[0034] 3) Preparation of photocatalyst: Disperse 120 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 300 g of N,N-dimethylformamide, and add 1,3...

Embodiment 3

[0038] A method for preparing a nano photocatalyst, comprising the steps of:

[0039] 1) Preparation of ternary sulfide nanocrystals: 100gTiCl 4 , 70gFeCl 3 , and 50g (NH4) 2 S is mixed with 260 g of ethylenediamine, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature is 190 ° C, the reaction time is 27 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals are separated;

[0040] 2) Surface modification of ternary sulfide nanocrystals: Disperse 130 g of ternary sulfide nanocrystals prepared in step 1) in 400 g of ethanol, then add 50 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 4 hours, then centrifuge, then wash with ether and ethyl acetate for 7 times, and finally dry in a vacuum oven at 80°C for 16 hours;

[0041]3) Preparation of photocatalyst: Disperse 135 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 400 g of N-methylpyrrolidone, and add 1,3,5-...

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Abstract

The invention discloses a preparation method of a nano photocatalyst. The preparation method comprises the following steps of 1) preparing a ternary sulfide nano crystal; 2) modifying the surface of the ternary sulfide nano crystal; 3) preparing a photocatalyst; and 4) performing ion exchange. The invention further discloses a nano photocatalyst prepared according to the preparation method. The nano photocatalyst disclosed in the invention can respond to a broad range of visible light and has high photocatalystic activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of new photocatalyst materials for environmental purification, and relates to a photocatalyst and a preparation method thereof, in particular to a nano photocatalyst with visible light response and a preparation method thereof. Background technique [0002] Photocatalysts can respond to sunlight or indoor light to absorb, decompose and remove environmental pollutants or have a self-cleaning effect on dirt attached to the surface of objects, and can realize the conversion of solar energy into chemical energy. A prerequisite for efficient solar photocatalytic conversion. Titanium dioxide is one of the typical photocatalysts with strong photocatalytic activity. However, titanium dioxide has a large band gap and has no absorption performance for visible light mainly composed of sunlight, and has no visible light activity. [0003] Organic photocatalyst is a new type of photocatalyst, which has a molecular stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/30
CPCC02F1/30B01J31/38C02F2305/10B01J35/40B01J35/39
Inventor 向红先
Owner 湖州达立智能设备制造有限公司
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