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Preparation method of sulfide-graphene composite material photoelectric catalyst

A composite material, graphene technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor conductivity, easy self-aggregation, etc., to improve catalytic activity, inhibit self-stacking, low cost effect

Active Publication Date: 2018-07-20
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[Y.Y. Liu, J.J. Wu, K.P. Hackenberg, J. Zhang, Y.M. Wang, Y.C. Yang, K. Keyshar, J. Gu, T. Ogitsu, R. Vajtai, J. Lou, P. M. Ajayan, B. C. Wood, B, I. Yakobson, Nat. Energy, 2017, 2, 17127.] Layered sulfides have the characteristics of large specific surface area, strong adsorption capacity, and high reactivity, but they still face defects such as poor electrical conductivity and easy self-aggregation.

Method used

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  • Preparation method of sulfide-graphene composite material photoelectric catalyst

Examples

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Embodiment 1

[0020] In this example, see figure 1 , a kind of preparation method of sulfide-graphene composite material photocatalyst, comprises the steps:

[0021] (1) Dissolve 1g of graphene oxide in 1000mL of deionized water and ultrasonically disperse to obtain a graphene oxide dispersion; dissolve 1g of cupric chloride dihydrate soluble metal salt in the above dispersion, fully stir for 1h and then let it stand Graphene oxide-copper chloride mixed solution, remove the precipitate and wash once, put it in a vacuum oven for drying at 45°C, and then grind it into powder to obtain graphene oxide powder doped with metal copper ions;

[0022] (2) ultrasonically disperse the copper ion-doped graphene oxide powder prepared in the step (1) in 100mL deionized water, then add 2g of molybdenum-containing sodium molybdate solution, and stir the mixed solution for 1h, Add 4 g of thiourea ((NH 2 ) 2 CS) to make a mixed solution of reactants, then transfer the mixed solution of reactants to a poly...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, especially in that:

[0028] In this example, see figure 2 , a kind of preparation method of sulfide-graphene composite material photocatalyst, comprises the steps:

[0029] (1) Dissolve 1g of graphene oxide in 1000mL of deionized water and ultrasonically disperse to obtain a graphene oxide dispersion; dissolve 1g of zinc chloride dihydrate soluble metal salt in the above dispersion, fully stir for 1h and then let it stand Graphene oxide-zinc chloride mixed solution, remove the precipitate and wash once, put it in a vacuum oven for drying at 45°C, and then grind it into powder to obtain graphene oxide powder doped with metal zinc ions;

[0030] (2) ultrasonically disperse the zinc ion-doped graphene oxide powder prepared in the step (1) in 100mL deionized water, then add 2g of molybdenum-containing sodium molybdate solution, and stir the mixed solution for 1h, After fully mixing, add 4g of thiourea to prepare a r...

Embodiment 3

[0035] This embodiment is basically the same as the previous embodiment, and the special features are:

[0036] In this example, see image 3 , a kind of preparation method of sulfide-graphene composite material photocatalyst, comprises the steps:

[0037] (1) Dissolve 1g of graphene oxide in 1000mL of deionized water and ultrasonically disperse to obtain a graphene oxide dispersion; dissolve 1g of nickel chloride hexahydrate soluble metal salt in the above dispersion, fully stir for 1h and then let it stand Graphene oxide-nickel chloride mixed solution, remove the precipitate and wash once, put it in a vacuum oven for drying at 45°C, and then grind it into powder to obtain graphene oxide powder doped with metal nickel ions;

[0038] (2) Ultrasonic dispersion of the graphene oxide powder doped with nickel ions prepared in the step (1) in 100mL deionized water, then adding 2g of molybdenum-containing sodium molybdate solution, and stirring the mixed solution for 1h, After ful...

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Abstract

The invention discloses a preparation method of a sulfide-graphene composite material photoelectric catalyst. The preparation method comprises the following steps: first, dispersing graphene oxide powder in water to obtain a graphene oxide dispersion liquid; then, adding soluble metal salt into the dispersion liquid, stewing the liquid, washing precipitates, and drying and grinding the precipitates to obtain metal ion-doped graphene oxide powder; dispersing the powder into deionized water again, stirring the powder, adding a sulfide precursor salt solution, adding thiourea, stirring the materials, obtaining a reaction product according to a one-step hydrothermal method, naturally cooling the product to room temperature, centrifugally washing the reaction product, and drying the product toobtain solid powder. The preparation method of a sulfide / graphene compound is simple; metal ions are used as an interface connection agent for sulfide and the surface of the graphene and a seed layerfor sulfide growth, so that uniform dispersion of a sulfide sheet layer is promoted, and stacking of the sulfide sheet layer is inhibited; a large specific surface area can provide a plurality of active sites, so that the catalysis performance of a composite material is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a photoelectric catalyst, in particular to a preparation method of a graphene composite material photocatalyst, which is applied in the technical field of photoelectric catalysis. Background technique [0002] With the increasingly serious problems of energy crisis, environmental damage, air pollution and global warming, renewable clean energy has received more and more attention. Hydrogen is considered to be a renewable energy source with abundant reserves, cleanness, environmental friendliness and high combustion value. So far, most of the research has been devoted to hydroelectric hydrogen analysis, photocatalytic hydrogen evolution, electrocatalytic hydrogen evolution (HER), etc. Among them, electrocatalytic hydrogen evolution is the High-efficiency and low-energy hydrogen energy preparation means. However, the most effective electrocatalytic hydrogen evolution reaction is based on the catalysis of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/051B01J27/0515B01J35/33Y02E60/36
Inventor 李文献葛日月何小芳于上家康吉祥胡业旻朱明原李瑛
Owner SHANGHAI UNIV
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