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Method of preparing MnWO4/g-C3N4 heterojunction composite photo-catalyst

A composite light and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve excellent photocatalytic activity, facilitate mass production, and reduce energy consumption.

Inactive Publication Date: 2017-03-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No g-C yet 3 N 4 with MnWO 4 Compound formation of heterojunction and application of photocatalysis

Method used

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  • Method of preparing MnWO4/g-C3N4 heterojunction composite photo-catalyst
  • Method of preparing MnWO4/g-C3N4 heterojunction composite photo-catalyst
  • Method of preparing MnWO4/g-C3N4 heterojunction composite photo-catalyst

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Experimental program
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Effect test

Embodiment example 1

[0021] Weigh 10g of melamine, grind it evenly and place it in a muffle furnace for calcination, set the initial temperature of the muffle furnace to 50°C, raise the temperature of the muffle furnace to 550°C at a heating rate of 2.3°C / min, and react at this temperature for 4h , naturally cooled to room temperature to obtain sample g-C 3 N 4 .

Embodiment example 2

[0023] (1) Weigh 0.164g of sodium tungstate and 0.0989g of manganese chloride and dissolve them in deionized water, and ultrasonically uniform; then slowly add the manganese chloride solution into the sodium tungstate solution with a dropper to obtain white tungsten manganese acid suspension.

[0024] (2) Use 1mol / L sodium hydroxide solution to adjust the pH value of the manganese tungstate solution to 9, then pour the solution into a 50mL hydrothermal kettle, and place the hydrothermal kettle in an oven at 180°C for 12h.

[0025] (3) After cooling to room temperature, centrifuge with ethanol and deionized water respectively to wash away organic and inorganic impurities in the sample, and then dry the obtained sample in an oven at 60°C. Finally got MnWO 4 sample.

Embodiment example 3

[0027] (1) Weigh 0.164g of sodium tungstate and 0.0989g of manganese chloride and dissolve them in deionized water, and stir until uniform; then slowly add the manganese chloride solution to the sodium tungstate solution with a dropper to obtain White manganese tungstate suspension.

[0028] (2) Weigh 0.228g-C 3 N 4 Add to the white manganese tungstate suspension prepared in step 1, g-C 3 N 4 The mass ratio of manganese tungstate to manganese tungstate is 6:4. After ultrasonication, adjust the pH value of the solution to 9 with 1mol / L sodium hydroxide solution, then pour it into a hydrothermal kettle and place it in an oven. The hydrothermal temperature is 180°C, and the hydrothermal time is 12h. The purpose of hydrothermal is to allow the reactants to synthesize nanocomposites under high temperature and high pressure hydrothermal conditions.

[0029](3) After cooling to room temperature, centrifuge with ethanol and deionized water respectively, and then dry the obtained ...

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Abstract

The invention belongs to the technical field of nano materials and provides a g-C3N4 / MnWO4 heterojunction photo-catalyst which is prepared with sodium tungstate, manganese chloride and melamine as raw materials and through a thermal treatment method. The photo-catalyst is used for degrading an organic pollutant Rhodamine B under visible light and has great significance on environment protection.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and uses sodium tungstate, manganese chloride and melamine as raw materials to prepare g-C 3 N 4 / MnWO 4 The heterojunction photocatalyst can be used to degrade the organic pollutant rhodamine B under visible light, which is of great significance for environmental protection. Background technique [0002] Environmental issues are one of the important issues facing the sustainable development of human beings. Traditional pollution treatment technologies are essentially just the transfer, transformation, and dilution of pollutants, and have not fundamentally achieved the complete degradation of pollutants. Photocatalytic technology is a low-energy, high-efficiency new environmental protection technology developed in recent years. It can be used for the degradation of organic pollutants and heavy metal pollutants in wastewater, the removal of harmful substances in the air, the advanced trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C02F1/30
CPCC02F1/30B01J23/34C02F2101/308B01J35/39Y02W10/37
Inventor 施伟东黄凯
Owner JIANGSU UNIV
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