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Silver-doped copper vanadate composite photocatalytic material, preparation method thereof and application of silver-doped copper vanadate composite photocatalytic material as carbon dioxide reduction photocatalyst

A technology of composite photocatalysis and copper vanadate, which is applied in the direction of carbon monoxide, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Catalytic activity is not very high, photocatalysis is rarely reported, etc., to achieve high catalytic activity and stability, increase adsorption capacity, and broaden the photoresponse range

Active Publication Date: 2022-04-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the relevant CuV 2 o 6 There are few reports on photocatalysis
and pure phase CuV 2 o 6 Because photogenerated electrons and holes are easy to recombine, the photocatalytic activity is not very high, and doping is a common and simple modification strategy. Through doping, the local electron density and arrangement of the material can be changed, and a certain crystal size can be formed at the same time. Changes and the generation of defects, which affect the light absorption ability and the separation efficiency of photogenerated carriers, that is, a series of changes in photoelectric characteristics and product properties caused by local microscopic lattice changes
But so far, there is no use of metallic silver to dope CuV 2 o 6 to improve its photocatalytic activity

Method used

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  • Silver-doped copper vanadate composite photocatalytic material, preparation method thereof and application of silver-doped copper vanadate composite photocatalytic material as carbon dioxide reduction photocatalyst
  • Silver-doped copper vanadate composite photocatalytic material, preparation method thereof and application of silver-doped copper vanadate composite photocatalytic material as carbon dioxide reduction photocatalyst
  • Silver-doped copper vanadate composite photocatalytic material, preparation method thereof and application of silver-doped copper vanadate composite photocatalytic material as carbon dioxide reduction photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 (comparative example)

[0046] CuV 2 o 6 Preparation of nanostructures: Weigh 0.402g of Cu(NO 3 ) 2 ·3H 2 Dissolve the O solid in 30ml of distilled water, stir and dissolve at room temperature until the yellow clear solution is recorded as A solution; weigh 0.303g of V 2 o 5 Disperse the solid in 30ml of pure water, stir at room temperature until the dispersion is uniform, and record it as B suspension; add B suspension to A solution drop by drop, continue stirring for 30 minutes, and record it as C suspension; adjust the pH at the same time =6, transfer the C suspension to a 100ml reactor, place the reactor in an oven, and react at a high temperature of 220°C for 24h. The yellow product obtained after the reaction was washed with water and ethanol, and then transferred to a vacuum drying oven at 50° C. for 6 h.

[0047] For the CuV prepared in embodiment 1 2 o 6 Some crystal structure and morphology studies were performed. Depend on figure 1 It ...

Embodiment 2

[0049] Silver doped CuV 2 o 6 Preparation of composite photocatalyst: weigh 0.402g of Cu(NO 3 ) 2 ·3H 2 Dissolve the O solid in 30ml of distilled water, stir and dissolve at room temperature until the yellow clear solution is recorded as A solution; weigh 0.303g of V 2 o 5 Disperse the solid in 30ml of pure water, stir at room temperature until the dispersion is uniform, and record it as B suspension; add B suspension to A solution drop by drop, continue stirring for 30 minutes, and record it as C suspension; adjust the pH at the same time =6. After stirring for 30 minutes, add different amounts of 0.1M silver nitrate solution, which is recorded as D solution, and continue stirring for 30 minutes. The C solution was transferred to a 100ml reaction kettle, and the reaction kettle was placed in an oven, and reacted at a high temperature of 220° C. for 24 hours. The yellow product obtained after the reaction was washed with water and ethanol, and then transferred to a vacu...

Embodiment 3

[0050] Embodiment 3 (comparative example)

[0051] CuV 2 o 6Nanostructures were prepared under different temperature and time conditions: Weighed 0.402g of Cu(NO 3 ) 2 ·3H 2 Dissolve the O solid in 30ml of distilled water, stir and dissolve at room temperature until the yellow clear solution is recorded as A solution; weigh 0.303g of V 2 o 5 Disperse the solid in 30ml of pure water, stir at room temperature until the dispersion is uniform, and record it as B suspension; add B suspension to A solution drop by drop, continue stirring for 30 minutes, and record it as C suspension; adjust the pH at the same time =6, transfer the C suspension to a 100ml reaction kettle, place the reaction kettle in an oven, and react at a high temperature of 80-180°C for 4-16 hours. The yellow product obtained after the reaction was washed with water and ethanol, and then transferred to a vacuum drying oven at 50° C. for 6 h. The morphology of the sample prepared in Example 3 was explored to...

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Abstract

The invention discloses a silver-doped copper vanadate composite photocatalytic material, a preparation method thereof and application of the silver-doped copper vanadate composite photocatalytic material as a carbon dioxide reduction photocatalyst. The silver-doped copper vanadate composite photocatalytic material is formed by doping silver ions into a nano strip-shaped CuV2O6 crystal. The preparation method of the silver-doped copper vanadate composite photocatalytic material comprises the step of carrying out one-step synthesis on an aqueous solution containing a vanadium source, a copper source and a silver source through a hydrothermal reaction. The composite photocatalytic material shows high catalytic activity and stability on carbon dioxide reduction under visible light irradiation, carbon dioxide can be converted into carbon monoxide in a high-selectivity mode, the preparation process of the composite photocatalytic material is simple and environmentally friendly, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a silver-doped copper vanadate composite photocatalytic material, and also to a method for preparing silver-doped copper vanadate composite photocatalytic material by one-step hydrothermal method, and to a The invention relates to the application of a silver-doped copper vanadate composite photocatalytic material in the catalytic reduction of carbon dioxide with visible light, and belongs to the technical field of carbon dioxide reduction. Background technique [0002] After more than 150 years of industrial development, the concentration of greenhouse gases has continued to rise, and the global average temperature has also increased. The sustainable use of unsustainable resources and the emission of greenhouse gases such as carbon dioxide hinder green and sustainable development. With the proposal of "carbon neutrality" and solving the problem of energy shortage, the development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J37/10C01B32/40
Inventor 陈立妙宋颖颖李庆森王文凯
Owner CENT SOUTH UNIV
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