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Visible light response catalyst and preparation method thereof

A catalyst and visible light technology, applied in the field of visible light responsive catalyst and its preparation, can solve the problems of few research reports and short research time, and achieve the effects of simple preparation method, stable photocatalytic degradation performance, and high ability to absorb visible light

Inactive Publication Date: 2014-07-23
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the short research time, there are few relevant research reports

Method used

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  • Visible light response catalyst and preparation method thereof
  • Visible light response catalyst and preparation method thereof
  • Visible light response catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 1.254g of ammonium metavanadate, add 50ml of deionized water, stir and dissolve in an 80°C water bath, and obtain an ammonium metavanadate solution. Weigh 2.0g of dysprosium oxide, add 3ml of concentrated nitric acid and 7ml of deionized water, stir and dissolve in an 80°C water bath to obtain a dysprosium nitrate solution. Then slowly add the dysprosium nitrate solution dropwise into the ammonium metavanadate solution under the condition of stirring, generate a yellow precipitate, filter after stirring and aging for 2 hours, wash three times with deionized water, and dry the obtained solid at 90°C in an oven Dry and finally bake in a muffle furnace at 500°C for 4 hours. DyVO prepared by precipitation method after natural cooling 4 .

[0027] (2) Weigh 5g of melamine, put it into a covered crucible, and put the crucible in a muffle furnace for 3 hours at 520°C for roasting. After natural cooling, the yellow g-C 3 N 4 .

[0028] (3) Weigh 0.10g of dyspros...

Embodiment 2

[0030] (1) Same as the step in (1) in Example 1.

[0031] (2) Same as the step in (2) in Example 1.

[0032] (3) Weigh 0.15g of dysprosium vanadate and 0.85g of graphite-type carbon nitride, mix and grind them for 10min, and finally roast at 450°C for 2 hours, and cool naturally to obtain vanadium roasted at 450°C DyVO with a dysprosium acid mass fraction of 0.15 4 / g -C 3 N 4 Composite catalyst.

Embodiment 3

[0034] (1) Same as the step in (1) in Example 1.

[0035] (2) Same as the step in (2) in Example 1.

[0036] (3) Weigh 0.20g of dysprosium vanadate and 0.80g of graphite-type carbon nitride, mix and grind them for 10min, and finally roast at 450°C for 2 hours, and cool naturally to obtain vanadium roasted at 450°C DyVO with a dysprosium acid mass fraction of 0.2 4 / g -C 3 N 4 Composite catalyst.

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Abstract

The invention relates to a visible light response catalyst and a preparation method thereof. The chemical composition general formula of the catalyst is xDyVO4 / g-C3N4, wherein x is the mass fraction of dysprosium vanadate in the catalyst, the mass fraction of g-C3N4 is 1-x, and x is at least 0.1 and is at most 0.4. The preparation method of the catalyst comprises the following steps of preparing the dysprosium vanadate and graphite phase carbon nitride with a precipitation method and a direct roasting method; then according to the DyVO4 / g-C3N4 mass ratio, mixing the dysprosium vanadate with the graphite phase carbon nitride to be ground for 10 minutes; and finally roasting for 2 hours at the temperature of 300-600 DEG C to obtain a catalyst finished product. The preparation method of the catalyst is simple and low in cost, and the visible light degradation performance to organic dyestuffs is good.

Description

technical field [0001] The invention relates to a visible light responsive catalyst and a preparation method thereof. Background technique [0002] Environmental pollution is a major challenge facing mankind at present. It has led to the continuous decline in the quality of people's drinking water and industrial water sources, and the increasing air pollution has caused continuous destruction of the ecological environment, seriously affecting people's health and quality of life. Therefore, how to purify environmental pollution economically and effectively is a major scientific challenge that we must face and solve. Compared with traditional physical adsorption, chemical catalysis and other methods, photocatalytic technology has the advantages of low cost, no secondary pollution, and wide application range. It is the most promising green environmental treatment technology in the 21st century. [0003] Since Fujishima and Honda discovered TiO in 1972 2 Since the phenomenon t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
Inventor 何益明蔡军李婷婷赵雷洪
Owner ZHEJIANG NORMAL UNIVERSITY
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