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Carbon-based sulfide composite photocatalyst, and preparation method and application thereof in degradation of heavy metals

A technology of sulfide and compound light, which is applied in the field of photocatalysis, can solve the problems of photocatalytic materials with two-dimensional nano flower-like structure, and achieve good stability, improved response and improved efficiency.

Active Publication Date: 2021-03-26
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there are no reports on photocatalytic materials based on carbon-based two-dimensional nanoflower structures.

Method used

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  • Carbon-based sulfide composite photocatalyst, and preparation method and application thereof in degradation of heavy metals
  • Carbon-based sulfide composite photocatalyst, and preparation method and application thereof in degradation of heavy metals
  • Carbon-based sulfide composite photocatalyst, and preparation method and application thereof in degradation of heavy metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Preparation of carbon spheres Cs

[0074] Weigh 6.16g of sucrose, dissolve the sucrose in 60ml of deionized water, stir it magnetically for 30min, put it into the reaction kettle, the reaction condition is 180°C, keep it warm for 4h, then wash it with deionized water and alcohol, and dry it to dryness Collect to get Cs.

[0075] (2) Preparation process material SnS 2 @Cs

[0076] Add 0.1g of Cs into 20ml of absolute ethanol and sonicate for 1h, then weigh 1.745g of tin tetrachloride pentahydrate and 0.7513g of thioacetamide respectively and add them to the solution, then add 40ml of absolute ethanol and stir magnetically for 1h , and then put the solution into the reaction kettle, the reaction condition is 160°C, keep it warm for 6h, then wash it with deionized water and alcohol, and dry it at 60°C overnight to collect SnS 2 @Cs.

[0077] (3) Preparation of control material SnS 2

[0078] SnS 2 The preparation of is under the experimental condition of above-m...

Embodiment 2

[0082] (1) Preparation of carbon spheres Cs

[0083] Weigh 6.16g of sucrose, dissolve the sucrose in 60ml of deionized water, stir it magnetically for 30min, put it into the reaction kettle, the reaction condition is 180°C, keep it warm for 4h, then wash it with deionized water and alcohol, and dry it to dryness The obtained Cs was collected, and the obtained Cs was calcined in a tube furnace under nitrogen protection at a calcining temperature of 800° C., a heating rate of 4 min / ° C., and a heat preservation of 4 h. Calcined Cs is finally obtained.

[0084] (2) Preparation process material SnS 2 @Cs

[0085] Add 0.1g of Cs into 20ml of absolute ethanol and sonicate for 1h, then weigh 1.745g of tin tetrachloride pentahydrate and 0.7513g of thioacetamide respectively and add them to the solution, then add 40ml of absolute ethanol and stir magnetically for 1h , and then put the solution into the reaction kettle, the reaction condition is 160°C, keep it warm for 6h, then wash ...

Embodiment 3

[0091] (1) Preparation of carbon spheres Cs

[0092]Weigh 6.16g of sucrose, dissolve the sucrose in 60ml of deionized water and stir it magnetically for 30 minutes, then put it into the reaction kettle, the reaction condition is 160°C, keep it warm for 4 hours, then wash it with deionized water and alcohol, and dry it to dryness The obtained Cs was collected, and the obtained Cs was calcined in a tube furnace under nitrogen protection at a calcining temperature of 500° C., a heating rate of 2 min / ° C., and a heat preservation of 4 h. Calcined Cs is finally obtained.

[0093] (2) Preparation process material SnS 2 @Cs

[0094] Add 0.2g of Cs into 20ml of absolute ethanol and sonicate for 1h, then weigh 1.745g of tin tetrachloride pentahydrate and 0.7513g of thioacetamide respectively and add them into the solution, then add 40ml of absolute ethanol and stir magnetically for 1h , and then put the solution into the reaction kettle, the reaction condition is 160°C, keep it warm...

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Abstract

The invention discloses a carbon-based sulfide composite photocatalyst, and a preparation method and application thereof in degradation of heavy metals. The preparation method comprises the followingsteps: (1) adding a carbon source into a solvent, and carrying out a reaction at the temperature of 160-200 DEG C to obtain Cs; or further calcining the Cs to obtain the calcined Cs; (2) adding Cs orcalcined Cs into absolute ethyl alcohol, carrying out ultrasonic uniform mixing, then adding stannide and a sulfur-containing compound, and carrying out a reaction at the temperature of 160-180 DEG Cto obtain SnS2@Cs; and (3) adding SnS2@Cs and PVP into water, uniformly stirring and mixing, centrifugally washing, adding the obtained intermediate product, aniline and iron chloride hexahydrate intowater, and carrying out a reaction at the temperature of 0-1 DEG C under dark environment conditions to obtain the carbon-based sulfide composite photocatalyst. The composite photocatalyst prepared by the method has a good oxidation-reduction effect and can be used for degrading heavy metals or dyes.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a carbon-based sulfide composite photocatalyst, a preparation method and its application in degrading heavy metals. Background technique [0002] In the past ten years, with the rapid development of human economy and the rapid growth of energy resources needed, human beings will face the development problems of energy crisis and environmental pollution. To solve these two problems, the fundamental point is to develop new energy sources for sustainable development and protect the environment. The sewage discharged during the industrial development process contains highly toxic heavy metal pollutants such as cadmium, chromium, and lead. This kind of sewage will endanger the growth of animals and plants and human health during the discharge process. It has the highest possibility of carcinogenicity and seriously endangers human health. [0003] At present, the m...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J31/06B01J21/18B01J37/10B01J37/08C02F1/30C02F1/70C02F1/72C02F101/30C02F101/22
CPCB01J27/04B01J31/069B01J37/10B01J21/18B01J37/084B01J37/082C02F1/30C02F1/70C02F1/725C02F2101/30C02F2101/22C02F2101/308C02F2305/10B01J35/397B01J35/39Y02W10/37
Inventor 黄晓凤侯贤华
Owner SOUTH CHINA NORMAL UNIVERSITY
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