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Method for synthesizing molybdenum disulfide-carbon nitride composite photocatalytic material

A technology of molybdenum disulfide and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effect of improving the catalytic effect of visible light

Active Publication Date: 2018-11-27
FUJIAN JIANGXIA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure molybdenum sulfide has a relatively high recombination rate of photogenerated electrons and holes, so its photocatalytic performance needs to be greatly improved.

Method used

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  • Method for synthesizing molybdenum disulfide-carbon nitride composite photocatalytic material
  • Method for synthesizing molybdenum disulfide-carbon nitride composite photocatalytic material
  • Method for synthesizing molybdenum disulfide-carbon nitride composite photocatalytic material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Put 10 grams of urea in a crucible and calcined at 500°C for 2 hours to obtain light yellow carbon nitride powder.

[0027] Dissolve 0.2 g of carbon nitride and 0.346 g of PEI (50% aqueous solution) in 30 ml of deionized water, stir ultrasonically for 30 minutes, then add 0.348 g of sodium molybdate dihydrate and 0.454 g of cysteine, and then add Deionized water up to 60 ml, stirred for 2 hours. Then the solution was transferred to a 100ml polytetrafluoroethylene reactor and reacted at 220°C for 20 hours. After the reactor was naturally cooled to room temperature, the black solid product was separated by centrifugation, washed with deionized water and absolute ethanol three times each, and dried in a vacuum oven at 70°C for 12 hours. The final product was heat-treated at 450 °C for 5 minutes in a nitrogen atmosphere in a tube furnace to obtain a molybdenum sulfide-carbon nitride composite material, in which the mass ratio of molybdenum disulfide to carbon nitride was 1...

Embodiment 2

[0030] Put 10 grams of urea in a crucible and calcined at 520° C. for 2 hours to obtain light yellow carbon nitride powder.

[0031] Dissolve 0.15 g of carbon nitride and 0.246 g of PEI (50% aqueous solution) in 30 ml of deionized water, stir ultrasonically for 30 minutes, then add 0.348 g of sodium molybdate dihydrate and 0.696 g of cysteine, and then add Deionized water up to 60 ml, stirred for 2 hours. Then the solution was transferred to a 100ml polytetrafluoroethylene reactor and reacted at 200°C for 24 hours. After the reaction kettle was naturally cooled to room temperature, the black solid product was separated by centrifugal washing, washed with deionized water and absolute ethanol three times each, and dried in a vacuum oven at 70°C for 12 hours. The final product was heat-treated at 430 °C for 5 minutes in a nitrogen atmosphere in a tube furnace to obtain a molybdenum sulfide-carbon nitride composite material, in which the mass ratio of molybdenum disulfide to carb...

Embodiment 3

[0033] Put 10 grams of urea in a crucible, and calcined at 550° C. for 2 hours to obtain light yellow carbon nitride powder.

[0034] Dissolve 0.1 g of carbon nitride and 0.162 g of PEI (50% aqueous solution) in 30 ml of deionized water, stir ultrasonically for 30 minutes, then add 0.348 g of sodium molybdate dihydrate and 0.454 g of cysteine, and then add Deionized water up to 60 ml, stirred for 2 hours. Then the solution was transferred to a 100ml polytetrafluoroethylene reactor and reacted at 180°C for 24 hours. After the reaction kettle was naturally cooled to room temperature, the black solid product was separated by centrifugal washing, washed with deionized water and absolute ethanol three times each, and dried in a vacuum oven at 70°C for 12 hours. The final product was heat-treated at 400° C. for 5 minutes in a nitrogen atmosphere in a tube furnace to obtain a molybdenum sulfide-carbon nitride composite material, wherein the mass ratio of molybdenum disulfide to carb...

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Abstract

The invention relates to a method for synthesizing a molybdenum disulfide-carbon nitride composite photocatalytic material. The method comprises the following steps: (1) calcining urea in a muffle furnace to obtain a carbon nitride powder material; 2) performing PEI (Polyetherimide) ultrasonic dispersion on the carbon nitride obtained in the step (1) and a cationic dispersant agent; (3) stirring the carbon nitride suspension obtained in the step (2) with sodium molybdate hydrate and cysteine in an aqueous solvent; (4) carrying out a hydrothermal reaction on the mixed solution in the step (3) in a high-pressure reactor, and performing suction filtration washing on the obtained solid product with absolute ethyl alcohol; and (4) calcining the dried solid product in a nitrogen furnace, therebyobtaining the molybdenum disulfide-carbon nitride composite material. According to the method disclosed by the invention, due to use of the novel cationic dispersant agent, the obtained molybdenum disulfide-carbon nitride composite material has a spherical structure, has an excellent visible light catalysis effect, and is a novel visible light catalytic material having potential application prospects.

Description

technical field [0001] The invention relates to the synthesis of a molybdenum sulfide-carbon nitride photocatalytic composite material, in particular to a synthesis method of the molybdenum sulfide-carbon nitride photocatalytic composite material under the action of a novel dispersant. Background technique [0002] As a two-dimensional layered material, molybdenum sulfide has the advantages of large specific surface area, good conductivity, narrow band gap, environmental friendliness and light stability, and is very suitable for use as photocatalyst and electrode material. However, pure molybdenum sulfide has a relatively high recombination rate of photogenerated electrons and holes, so its photocatalytic performance still needs to be greatly improved. Combining molybdenum sulfide with other semiconductor materials to prepare composite photocatalytic materials is an effective means to improve photocatalytic efficiency. Layered carbon nitride has the advantages of special th...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/08
CPCB01J27/24B01J35/51B01J35/39
Inventor 江琳沁邱羽林灵燕李平严琼颜峰坡范宝殿
Owner FUJIAN JIANGXIA UNIV
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