Preparation method of composite catalyst for hydrogen production by photolysis of water

A technology of composite catalyst and photolysis of water to produce hydrogen, which is applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., and can solve problems such as limited improvement rate

Inactive Publication Date: 2020-05-15
胡祥坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as NiO-MoS 2 / RGO nanocomposite catalysts, although these new catalysts can improve photocatalytic efficiency to a certain extent, their improvement rate is limited, and it is difficult to meet the needs of actual use. Therefore, it is necessary to provide a catalyst preparation method with better performance

Method used

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  • Preparation method of composite catalyst for hydrogen production by photolysis of water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First measure 12ml of aqueous ammonia solution (25%, mass concentration) and add it to 100ml of nickel nitrate aqueous solution, then add 100ml of urea aqueous solution, stir and mix, heat and react in a water bath at 90°C for 3h, after the reaction is over, filter and wash to recover the precipitate, and The recovered precipitate was calcined at 400°C for 2 hours to prepare NiO hollow microspheres; the molar ratio of nickel nitrate to urea in the nickel nitrate aqueous solution and the urea aqueous solution was 1:2;

[0017] Graphene oxide is added in 200ml alcoholic solution (50%, mass concentration), ultrasonic dispersion mixes, and then adds Ti 3 C 2 Nano-powder, ultrasonically dispersed and mixed, prepared to obtain A solution, Ti in A solution 3 C 2 The content of 0.5mg / ml, the content of graphene oxide is 3.0mg / ml;

[0018] Measure the above-mentioned A solution of 30ml, take by weighing 2.42g of sodium molybdate (Na 2 MoO 4 2H 2 (2), 1.5g NiO hollow micros...

Embodiment 2

[0021] First measure 12ml of aqueous ammonia solution (25%, mass concentration) and add it to 100ml of nickel nitrate aqueous solution, then add 100ml of urea aqueous solution, stir and mix, heat and react in a water bath at 90°C for 3h, after the reaction is over, filter and wash to recover the precipitate, and The recovered precipitate was calcined at 400°C for 2 hours to prepare NiO hollow microspheres; the molar ratio of nickel nitrate to urea in the nickel nitrate aqueous solution and the urea aqueous solution was 1:2;

[0022] Graphene oxide was added in 200ml alcohol solution (50%, mass concentration), and ultrasonically dispersed and mixed to prepare A solution. The content of graphene oxide in A solution was 3.0mg / ml;

[0023] Measure the above-mentioned A solution of 30ml, take by weighing 2.42g of sodium molybdate (Na 2 MoO 4 2H 2 (2), 1.5g NiO hollow microspheres are dropped into the inside successively, ultrasonically dispersed and mixed, then add 3.5g of thiour...

Embodiment 3

[0026] The performance of the composite catalysts prepared in the above examples 1 and 2 was tested on the MC-SPH2O automatic photocatalytic total water splitting experimental test system. Assemble the composite catalysts prepared in Examples 1 and 2 into the photolysis water system respectively; pass high-purity nitrogen gas for 30 minutes, remove the dissolved oxygen in the reaction system and the air in the pipeline; check the system, turn on the constant temperature circulating water, and start Xenon lamp light source (power 300W), UV light was filtered out with CUT400, and the photocatalytic hydrogen production activity of the composite catalyst was tested for 12 hours of light irradiation. The hydrogen content was detected online by an on-line gas chromatograph, a TCD detector, and a TDX-01 gas-phase packed column. The results of hydrogen production by photolysis of water are shown in Table 1.

[0027] Table 1 Catalyst visible light photolysis of water hydrogen productio...

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Abstract

The invention discloses a preparation method of a composite catalyst for hydrogen production by photolysis of water. The preparation method comprises the following steps: ultrasonically and uniformlydispersing graphene oxide, Ti3C2 nano-powder, sodium molybdate and NiO hollow microspheres in an alcohol solvent, then adding thiourea, carrying out ultrasonic and uniform dispersing and mixing, carrying out microwave heating reaction, recovering a microwave heating reaction product, and carrying out after-treatment on the reaction product to obtain the composite catalyst. According to the composite catalyst, graphene oxide, Ti3C2 and MoS2 are assembled on the outer surfaces of NiO hollow microspheres, so that effective separation of photon-generated carriers can be promoted, high-performancewater photolysis hydrogen production performance of molybdenum disulfide is realized, the photocatalytic activity of the catalyst is greatly improved, and natural light can be efficiently utilized toperform photohydrolysis with high efficiency.

Description

technical field [0001] The invention relates to the technical field of photolysis water catalyst preparation, in particular to a preparation method of photolysis water hydrogen production catalyst. Background technique [0002] Hydrogen energy is a very environmentally friendly new energy source. At present, countries all over the world have conducted a lot of research on hydrogen production by photolysis of water, and have also prepared a variety of photocatalysts for photolysis of water. Such as NiO-MoS 2 / RGO nanocomposite catalysts, although these new catalysts can improve photocatalytic efficiency to a certain extent, their improvement rate is limited, and it is difficult to meet the needs of actual use. Therefore, it is necessary to provide a catalyst preparation method with better performance . Contents of the invention [0003] The object of the present invention is to provide a preparation method of a catalyst for hydrogen production by photolysis of water, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C01B3/04
CPCB01J27/22B01J35/004C01B3/042Y02E60/36
Inventor 胡祥坤
Owner 胡祥坤
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