Method for preparing graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting coprecipitation method

A -snin4s8, nanocomposite technology, applied in the field of photocatalyst preparation, can solve the problems of harming the environment, easy dissolution, expensive metal materials, etc., and achieve the effects of short preparation time, large specific surface area, high stability and regeneration performance

Inactive Publication Date: 2015-06-03
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(4) The price of metal materials is relatively expensive, and they are easy to dissolve during the reaction process and endanger the environment

Method used

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  • Method for preparing graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting coprecipitation method
  • Method for preparing graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting coprecipitation method
  • Method for preparing graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting coprecipitation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Using graphite powder as raw material, graphene oxide was synthesized by the Hummers method, and then reduced with 80% hydrazine hydrate to obtain reduced graphene oxide.

[0024] (2) Add 2.0 mmol of tin chloride, 8.0 mmol of indium chloride, and 12 mmol of thioacetamide into 50 mL of ethanol solution and stir until the solution is transparent, then add 0.2 mmol of graphene, and then perform ultrasonication for 30 min.

[0025] (3) Transfer the solution to a 100 mL three-necked flask, add a condensing reflux device, and stir at an appropriate rate, and the temperature of the water bath is 55o C, the water bath time is 4 hours.

[0026] (4) The sample after the water bath was suction filtered and washed three times with deionized water and ethanol, and the obtained sample was at 80 o C for 12 hours. Then take it out, let it cool naturally, and grind it. The resulting product is RGO-SnIn 4 S 8 Nanocomposite photocatalysts.

Embodiment 2

[0028] (1) Using graphite powder as raw material, graphene oxide was synthesized by the Hummers method, and then reduced with 80% hydrazine hydrate to obtain reduced graphene oxide.

[0029] (2) Add 2.0 mmol of tin chloride, 8.0 mmol of indium chloride, and 24 mmol of thioacetamide into 50 mL of ethylene glycol solution and stir until the solution is transparent, then add 0.1 mmol of graphene, and then perform ultrasonication for 30 min.

[0030] (3) Transfer the solution to a 100 mL three-neck flask, add a condensing reflux device, and stir at an appropriate rate, and the temperature of the water bath is 95 o C, the water bath time is 10 hours.

[0031] (4) The sample after the water bath was suction filtered and washed three times with deionized water and ethanol, and the obtained sample was at 80 o C for 12 hours. Then take it out, let it cool naturally, and grind it. The resulting product is RGO-SnIn 4 S 8 Nanocomposite photocatalysts.

Embodiment 3

[0033] (1) Using graphite powder as raw material, graphene oxide was synthesized by the Hummers method, and then reduced with 80% hydrazine hydrate to obtain reduced graphene oxide.

[0034] (2) Add 2.0 mmol of tin chloride, 8.0 mmol of indium chloride, and 12 mmol of thioacetamide into 50 mL of butanol solution and stir until the solution is transparent, then add 0.06 mmol of graphene, and then perform ultrasonication for 30 min.

[0035] (3) Transfer the solution to a 100 mL three-necked flask, add a condensing reflux device, and stir at an appropriate rate, and the temperature of the water bath is 55 o C, the water bath time is 10 hours.

[0036] (4) The sample after the water bath was suction filtered and washed three times with deionized water and ethanol, and the obtained sample was at 80 o C for 12 hours. Then take it out, let it cool naturally, and grind it. The resulting product is RGO-SnIn 4 S 8 Nanocomposite photocatalysts.

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Abstract

The invention relates to a method for preparing a graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting a coprecipitation method. The method is characterized by comprising the following steps: preparing graphene oxide by utilizing a modified Hummers method, and reducing the graphene oxide by utilizing 80% hydrazine hydrate to obtain reduced graphene oxide; dissolving raw materials such as tin chloride, indium chloride and thioacetamide in an organic alcohol solution, mixing the reduced graphene oxide which is prepared in advance, and preparing the graphene-SnIn4S8 nano composite photocatalyst bonded in chemical bonds by utilizing a low-temperature co-precipitation method. The method has characteristics that the reaction temperature is low, the reaction time is short, the prepared graphene-SnIn4S8 nano composite photocatalyst is relatively large in specific surface area and narrow in energy gap, photo-generated electrons can be effectively separated from electron holes, the stability is high, the regeneration performance is good, and the light absorption activity and the light catalytic activity are relatively strong under the visible light.

Description

technical field [0001] The invention relates to a photocatalyst preparation method, a low-temperature preparation of graphene-SnIn with visible response and high catalytic mineralization ability by co-precipitation method 4 S 8 A method for nanocomposite photocatalysts. Background technique [0002] Synthetic dyes have been widely used in many industries, such as textiles, printing and dyeing, cosmetics, petroleum, leather, etc., and are discharged into the water environment through industrial wastewater. Dyes have carcinogenic and mutagenic properties and necessarily pose potential environmental and health risks. Therefore, how to remove dyes from wastewater becomes very important before dye wastewater is discharged into the environment. So far, adsorption, flotation biological treatment, chemical oxidation, electrochemical treatment and heterogeneous photocatalytic oxidation technology have been used to remove dyes in wastewater, among which heterogeneous photocatalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B82Y30/00
Inventor 邓芳裴旭乐李文涛罗旭彪罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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