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Catalyst capable of responding to visible light and being used for producing hydrogen by photocatalytic water splitting and preparation method of catalyst

A technology of photolysis of water to produce hydrogen and catalysts, which is applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc. It can solve the problems of difficult quality assurance, high price, and difficulty in large-scale production of graphene. Achieve the effect of reducing preparation cost, reducing loading capacity, and efficiently photolyzing water to produce hydrogen

Active Publication Date: 2013-01-09
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that graphene itself is still difficult to produce on a large scale, the price is high, and the quality is difficult to guarantee. At the same time, its visible light catalytic efficiency and photo-splitting water hydrogen production efficiency need to be further studied and improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. Preparation of (1wt%)NiS-(0.4wt%)PdS / CdS by deposition method and its catalytic hydrogen production effect

[0020] 1) Slowly add 200ml of 0.2M sodium sulfide aqueous solution to 250ml of 0.2M cadmium acetate aqueous solution, stir for 24 hours and then let it stand for 24 hours. 24 hours; then suction filtered and dried at 80°C to obtain CdS.

[0021] 2) Put 0.15g (0.001mol) of the prepared CdS into 50ml of sodium sulfide solution (5M), stir constantly, slowly add 0.8ml of nickel sulfate aqueous solution (0.02M) and 0.2ml of palladium chloride aqueous solution (Pd: 0.00236g / ml). Stir for 1 hour, then filter, and then dry at 80°C for 8 hours to obtain NiS-PdS / CdS.

[0022] The prepared NiS-PdS / CdS was dispersed in 80mL of 30vol% lactic acid, placed in a photocatalytic reactor, irradiated with visible light from a 300W xenon lamp (using sodium nitrite solution to filter out light below 420nm), and the hydrogen generated by the reaction was charged with Gas...

Embodiment 2

[0023] Example 2, Preparation of (1wt%)NiS-(0.4wt%)PdS / CdS by deposition method and its catalytic hydrogen production effect

[0024] 1) Slowly add 200ml of 0.2M sodium sulfide aqueous solution into 250ml of 0.2M cadmium acetate aqueous solution, stir for 24 hours and then let stand for 24 hours, transfer the precipitate to a high-pressure hydrothermal kettle for hydrothermal treatment. The hydrothermal temperature is 140°C, and the hydrothermal time is 48 hours. Then filter with suction and dry at 80°C to obtain CdS.

[0025] 2) Put 0.15g (0.001mol) of the prepared CdS into 50ml of sodium sulfide solution (5M), stir constantly, slowly add 0.8ml of nickel nitrate aqueous solution (0.02M) and 0.2ml of palladium chloride aqueous solution (Pd: 0.00236g / ml). Stir for 1 hour, then filter and dry at 80°C for 8 hours to obtain NiS-PdS / CdS.

[0026]The prepared NiS-PdS / CdS was dispersed in 80mL of 30vol% lactic acid, placed in a photocatalytic reactor, irradiated with visible ligh...

Embodiment 3

[0027] Example 3, Preparation of (1wt%)NiS-(0.4wt%)PdS / CdS by deposition method and its catalytic hydrogen production effect

[0028] 1) Slowly add 200ml of 0.2M sodium sulfide aqueous solution into 250ml of 0.2M cadmium acetate aqueous solution, stir for 24 hours and then let stand for 24 hours, transfer the precipitate to a high-pressure hydrothermal kettle for hydrothermal treatment. The hydrothermal temperature is 200° C., and the hydrothermal is 36 hours. Then filter with suction and dry at 80°C to obtain CdS.

[0029] 2) Put 0.15g (0.001mol) of the prepared CdS into 50ml sodium sulfide aqueous solution (5M), stir constantly, slowly add 0.8ml nickel chloride aqueous solution (0.02M) and 0.2ml palladium chloride aqueous solution (Pd: 0.00236 g / ml). Stir for 1 hour, then filter and dry at 80°C for 8 hours to obtain NiS-PdS / CdS.

[0030] The prepared NiS-PdS / CdS was dispersed in 80mL of 30vol% lactic acid, placed in a photocatalytic reactor, irradiated with visible light ...

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PUM

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Abstract

The invention discloses a catalyst capable of responding to visible light and being used for producing hydrogen by photocatalytic water splitting and a preparation method of the catalyst. The catalyst comprises CdS and an auxiliary loaded on the CdS, and the auxiliary is a mixture of NiS and an optional one of PdS, Ru2S3, Rh2S3 and Ag2S. The CdS is added into aqueous solution containing an S compound, and a Ni compound and a compound containing an optional one of Pd, Ru, Rh and Ag are added into the aqueous solution under the condition of stirring to obtain the catalyst capable of producing the hydrogen by photocatalytic water splitting via stirring. The auxiliary of the photochemical catalyst capable of absorbing the visible light is added with Ni metal, load of auxiliaries which are precious metals is obviously reduced, and the cost for preparing the catalyst can be lowered.

Description

technical field [0001] The invention relates to a photocatalyst for producing hydrogen by photolysis of water in response to visible light and a preparation method thereof, belonging to the technical field of photocatalysts. Background technique [0002] Photocatalysis is an emerging technology for environmental purification and energy conversion. In terms of environmental purification, photocatalysts can effectively degrade harmful gas molecules adsorbed on its surface, kill bacteria, inhibit viruses, and convert harmful organic matter and bacteria into harmless substances such as water and carbon dioxide without any secondary pollution . In terms of energy conversion, photocatalytic technology can be used to convert light energy into chemical energy. The more common one is photolysis of water to produce hydrogen, which directly converts solar energy into hydrogen energy. With the development of photocatalytic technology, it is expected to use sunlight to directly obtain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045B01J27/043B01J35/00C01B3/04
CPCY02E60/364Y02E60/36
Inventor 林培宾李强杨俞苏佳纯上官文峰孙洋洲
Owner CHINA NAT OFFSHORE OIL CORP
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