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Preparation method of Z-configuration visible light catalytic decomposing water composite material

A composite material, catalytic decomposition technology, applied in the field of photocatalytic water splitting technology, photocatalysis, and nanocomposite materials, can solve the problems of poor photocatalytic activity and stability, high cost, and achieve good cycle stability, low cost, and improved efficiency. and stability effects

Inactive Publication Date: 2017-08-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure silver phosphate materials have obvious shortcomings: (1) The photogenerated electrons generated in the photocatalytic process cannot be effectively separated to cause self-corrosion, resulting in poor photocatalytic activity and stability; (2) Pure silver phosphate materials are used in photocatalytic The cost of water decomposition and oxygen production system is relatively high

Method used

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  • Preparation method of Z-configuration visible light catalytic decomposing water composite material
  • Preparation method of Z-configuration visible light catalytic decomposing water composite material
  • Preparation method of Z-configuration visible light catalytic decomposing water composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Ultrasonically disperse 20 mg of flower-shaped molybdenum disulfide in 50 mL of deionized water, ultrasonically for 10 minutes to obtain a molybdenum disulfide dispersion, weigh 3.06 g of silver nitrate and dissolve it in 50 mL of distilled water to obtain a silver nitrate solution, and stir it with a magnetic stirrer to Add the configured silver nitrate solution to the flower-shaped molybdenum disulfide dispersion, and stir for 12 hours to obtain a mixed precursor solution; weigh 2.28g of sodium phosphate and dissolve it in 30mL of deionized water to obtain a sodium phosphate solution. Under stirring conditions, the sodium phosphate solution was added dropwise to the mixed precursor solution, and the reaction system gradually became gray-green turbid. After the dropwise addition, the mixed solution continued to stir for 3 hours, and the final product was washed three times with water and washed three times with alcohol.

Embodiment 2

[0034] Ultrasonically disperse 50 mg of flower-shaped molybdenum disulfide in 50 mL of deionized water, ultrasonically for 10 minutes, to obtain a molybdenum disulfide dispersion, weigh 3.06 g of silver nitrate and dissolve it in 30 mL of distilled water to obtain a silver nitrate solution, and stir it with a magnetic stirrer. Add the configured silver nitrate solution to the flower-shaped molybdenum disulfide dispersion, and stir for 12 hours to obtain a mixed precursor solution; weigh 2.28g of sodium phosphate and dissolve it in 30mL of deionized water to obtain a sodium phosphate solution. Under stirring conditions, the sodium phosphate solution was added dropwise to the mixed precursor solution, and the reaction system gradually became gray-green turbid. After the dropwise addition, the mixed solution continued to stir for 3 hours, and the final product was washed three times with water and washed three times with alcohol.

Embodiment 3

[0036] Ultrasonically disperse 100mg of flower-like molybdenum disulfide in 50mL deionized water, ultrasonically for 10 minutes to obtain a molybdenum disulfide dispersion, weigh 3.06g of silver nitrate and dissolve it in 30mL of distilled water to obtain a silver nitrate solution, and stir it with a magnetic stirrer. Add the configured silver nitrate solution to the molybdenum disulfide dispersion, and stir for 12 hours to obtain a mixed precursor solution; weigh 2.28g of sodium phosphate and dissolve it in 30mL of deionized water to obtain a sodium phosphate solution. Next, the sodium phosphate solution was added dropwise to the mixed precursor solution, and the reaction system gradually became gray-green turbid. After the dropwise addition, the mixed solution continued to stir for 3 hours, and the final product was washed three times with water and washed three times with alcohol.

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Abstract

The invention relates to a photocatalytic water splitting material, and particularly relates to a Z-configuration visible light catalytic decomposing water composite material and a preparation method thereof. The preparation method comprises the steps of dropwise adding a silver nitrate solution into flower-like molybdenum disulfide dispersion liquid under stirring, and stirring to obtain a mixed precursor solution; weighing and dissolving phosphate into deionized water to obtain a phosphate solution; under stirring, adding a sodium phosphate solution into the prepared mixed precursor solution, enabling the solution to gradually generate greyish-green sediments along with the adding of sodium phosphate, continuously stirring the mixed solution for 3h after dropwise adding, finally washing the reaction sediments with deionized water and ethyl alcohol respectively for three times and vacuum drying. The bent basal plane formed by flower-like molybdenum disulfide can become the main active site of a light-catalyzed reaction, and is stronger than a molybdenum disulfide nanosheet within the absorption range of visible light, and the performance of the composite photocatalyst can be further improved.

Description

technical field [0001] The present invention relates to a photolytic water splitting material, in particular to a Z-configuration visible light catalytic water splitting composite material and its preparation method, in particular to a silver phosphate-based composite visible light catalytic material prepared by electrostatic self-assembly by ion exchange in an aqueous solution The method belongs to the fields of nanocomposite materials, photo-water splitting technology and photocatalysis. Background technique [0002] In recent years, the Z-configuration photocatalytic water-splitting semiconductor composite system based on artificial photosynthesis has received extensive attention. The existence of the electrons and holes realizes the effective transfer and separation of electrons and holes, and the process of photo-splitting water is relatively easy and efficient. In addition, there are many combinations of semiconductor materials that can be selected for water oxidation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J27/051
CPCB01J27/051B01J27/1817B01J35/39
Inventor 咸晓斋张馨月张靓庞炳玉吴恒伟杨小飞
Owner JIANGSU UNIV
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