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Cobalt sulfide photocatalyst, and preparation method and application thereof

A cobalt sulfide photocatalyst technology, applied in the field of photocatalysis, can solve the problems of expensive noble metal deposition, low utilization efficiency of visible light, unsatisfactory, etc., and achieve the effect of short cycle, low cost and convenient operation

Active Publication Date: 2016-12-21
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of photocatalysis, TiO 2 The application is very wide, but it only responds in the ultraviolet range, and the utilization efficiency of visible light is low, although the modified TiO 2 Some visible light activity, but still unsatisfactory
For example: organic dyes photosensitized by organic dyes will undergo photochemical reactions such as degradation, while precious metal deposition is expensive and prone to poisoning and inactivation

Method used

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  • Cobalt sulfide photocatalyst, and preparation method and application thereof
  • Cobalt sulfide photocatalyst, and preparation method and application thereof
  • Cobalt sulfide photocatalyst, and preparation method and application thereof

Examples

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Embodiment 1

[0029] A kind of cobalt sulfide photocatalyst of the present invention, the chemical formula of this cobalt sulfide photocatalyst is Co 2.67 S 4 , the grain size is 5nm ~ 20nm.

[0030] A kind of preparation method of the cobalt sulfide photocatalyst of above-mentioned present embodiment, comprises the following steps:

[0031] (1) Add 1mmol of cobalt chloride to 40mL of ethylene glycol, stir well to dissolve it completely, then add 2.2mmol of sodium sulfide, stir well to mix evenly, and obtain a mixed solution.

[0032] (2) Move the mixed solution in step (1) to a polytetrafluoroethylene-lined reaction kettle, seal and heat it, and react at 150°C for 24 hours, then cool the reaction kettle to room temperature naturally, and put the reaction kettle The black precipitate was centrifuged, washed, and dried at 60 °C for 12 h to obtain the photocatalyst Co with full spectral response 2.67 S 4 , which is the cobalt sulfide photocatalyst of the present invention.

Embodiment 2

[0034] A kind of cobalt sulfide photocatalyst of the present invention, the chemical formula of this cobalt sulfide photocatalyst is Co 2.67 S 4 , the grain size is 5nm ~ 20nm.

[0035] A kind of preparation method of the cobalt sulfide photocatalyst of above-mentioned present embodiment, comprises the following steps:

[0036] (1) Add 1mmol of cobalt chloride to 40mL of ethylene glycol, stir well to dissolve it completely, then add 2.2mmol of sodium sulfide, stir well to mix evenly, and obtain a mixed solution.

[0037] (2) Move the mixed solution in step (1) to a polytetrafluoroethylene-lined reaction kettle, seal and heat it, and react at 180°C for 24 hours, then cool the reaction kettle to room temperature naturally, and place the The black precipitate was centrifuged, washed, and dried at 60 °C for 12 h to obtain the photocatalyst Co with full spectral response 2.67 S 4 , which is the cobalt sulfide photocatalyst of the present invention.

[0038] figure 1 The photo...

Embodiment 3

[0041] A kind of cobalt sulfide photocatalyst of the present invention, the chemical formula of this cobalt sulfide photocatalyst is Co 2.67 S 4 , the grain size is 5nm ~ 20nm.

[0042] A kind of preparation method of the cobalt sulfide photocatalyst of above-mentioned present embodiment, comprises the following steps:

[0043] (1) Add 1mmol of cobalt chloride to 40mL of ethylene glycol, stir well to dissolve it completely, then add 2.2mmol of sodium sulfide, stir well to mix evenly, and obtain a mixed solution.

[0044] (2) Move the mixed solution in step (1) to a polytetrafluoroethylene-lined reaction kettle, seal and heat it, and react at 200°C for 24 hours, then cool the reaction kettle to room temperature naturally, and place the The black precipitate was centrifuged, washed, and dried at 60 °C for 12 h to obtain the photocatalyst Co with full spectral response 2.67 S 4 , which is the cobalt sulfide photocatalyst of the present invention.

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Abstract

The invention discloses a cobalt sulfide photocatalyst. The chemical formula of the cobalt sulfide photocatalyst is Co2.67S4. The preparation method of the photocatalyst comprises the following steps: adding cobalt chloride and sodium sulfide to ethylene glycol, and uniformly mixing cobalt chloride, sodium sulfide and ethylene glycol to obtain a mixed solution; and carrying out a heating reaction on the mixed solution to obtain the cobalt sulfide photocatalyst. The cobalt sulfide photocatalyst has the advantages of full-spectrum response and high photocatalysis efficiency, and can be applied to catalytic degradation of dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a cobalt sulfide photocatalyst and a preparation method and application thereof. Background technique [0002] In recent decades, modern industry has developed rapidly, so the energy crisis and environmental pollution faced by the world are very severe. Among them, dye wastewater has the characteristics of large water volume, deep color, high content of organic pollutants, complex components, strong acidity and alkalinity, strong oxidation resistance, difficult biodegradation, and high biological toxicity. (carcinogenic, teratogenic, mutagenic) properties of organic substances. The direct discharge of these dye wastewater will not only deteriorate the water quality and soil quality, but also threaten the health and safety of aquatic organisms and human beings. Therefore, how to effectively control dye wastewater pollution has become a major task for environmental workers t...

Claims

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Application Information

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IPC IPC(8): B01J27/043C01G51/00B82Y30/00C02F1/30C02F1/32C02F101/38
CPCC01G51/30C02F1/30C02F1/32B01J27/043C01P2002/72C01P2006/64C02F2101/308C02F2101/40C02F2305/10B01J35/40B01J35/39Y02W10/37
Inventor 袁兴中吴珍珍王侯吴志斌蒋龙波王惠陈晓红曾光明
Owner HUNAN UNIV
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