Preparation method of nickel sulfide/graphene-like carbonitride composite catalyst

A technology of alkene carbonitride compound and composite catalyst, which is applied in the fields of material science and photocatalytic hydrogen production, and achieves the effects of excellent hydrogen production activity and stability, simple and efficient method and large number of effects.

Inactive Publication Date: 2018-05-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as we know, the photodeposition method used in this experiment is in the g-C 3 N 4 Nickel sulfide loaded on the surface has not been reported in the literature

Method used

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  • Preparation method of nickel sulfide/graphene-like carbonitride composite catalyst
  • Preparation method of nickel sulfide/graphene-like carbonitride composite catalyst
  • Preparation method of nickel sulfide/graphene-like carbonitride composite catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Weigh 20g of thiourea and put it into a crucible to add a cover, heat it under 550°C air atmosphere for 2 hours, and the heating rate is 2°C / min. After grinding the obtained yellow powder, put it into an uncovered crucible, Heating at 500°C for 2 hours, the heating rate is still 2°C / min. Finally, the obtained light yellow powder is graphene-like carbon nitrogen compound;

[0019] (2) In a 25mL single-necked round bottom flask, add 20mg of graphene-like carbonitride, 12.5mg of nickel acetate, 38mg of thiourea, 4mL of absolute ethanol, 6mL of ultrapure water, and ultrasonically treat for 5 minutes to disperse and mix evenly. Nitrogen was introduced for 40 minutes to remove oxygen in the reaction system.

[0020] (3) Place the flask under a 300W xenon lamp, and after irradiating for 20 minutes, use centrifugation to separate the solid, wash twice with deionized water, and once with ethanol, put the obtained solid in a vacuum drying oven, and dry overnight at 80°C to ob...

Embodiment 2

[0023] Get nickel sulfide / graphene-like carbonitride compound catalyst 5mg prepared in embodiment 1 and place in 25mL round bottom flask, add 1mL triethanolamine (98%), 9mL water; Ultrasonic treatment 5min, remove reaction with nitrogen degassing 40min Oxygen in the system; the round-bottomed flask is placed in a 300W xenon lamp, illuminated under a 400nm filter, and after the reaction is over, detect the hydrogen generated by the reaction with a thermal conductivity-gas chromatograph. The hydrogen production rate of this catalyst is about 800 μmol g -1 h -1 , and after 30 hours of reaction, the hydrogen production rate did not significantly decrease ( Figure 4 ).

Embodiment 3

[0025] Get nickel sulfide / graphene-like carbonitride composite catalyst 5mg prepared in embodiment 1 and place in 25mL round bottom flask, add 1mL triethanolamine (98%), 9mL water; Ultrasonic treatment 5min, remove reaction with nitrogen degassing 40min Oxygen in the system; put the round bottom flask under natural sunlight for 2 hours, and the hydrogen production rate is about 1000μmol g -1 h -1 ( Figure 5 ).

[0026] As can be seen from the above examples, the nickel sulfide / graphene-like carbonitride composite catalyst prepared by the present invention has the advantages of simple synthesis method, high hydrogen production rate, good stability, etc., and has a good application in the field of photocatalytic hydrogen production. Industrial application prospects.

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Abstract

The invention aims at relieving the problems of increasingly serious energy shortage and environmental pollution. The nickel sulfide / graphene-like carbonitride composite catalyst, which does not contain a noble metal, is prepared through a mild in-situ photodeposition method and is used for efficiently photocatalytically decomposing water to produce hydrogen. According to the method, the nickel sulfide / graphene-like carbonitride composite catalyst is prepared by using graphene-like carbonitride as a photosensitizer, nickel acetate as a nickel source and thiourea as a sulfur source. The preparation method is simple, efficient, low-carbon, environment-friendly and low-cost; further, the photocatalytic hydrogen production rate of the catalyst is high, and therefore, the nickel sulfide / graphene-like carbonitride composite catalyst has a quite good industrialized application prospect in the field of photocatalytic hydrogen production.

Description

technical field [0001] The invention proposes a convenient preparation method of a nickel sulfide / graphene-like carbon-nitrogen compound composite catalyst, which belongs to the field of material science and technology and the field of photocatalytic hydrogen production. Background technique [0002] With the increasingly severe energy dilemma and environmental pollution, the development of green and renewable energy has attracted great attention. Hydrogen energy has the advantages of high combustion value, clean and pollution-free products, and is renewable. It can be used as a substitute for fossil energy, thereby helping to alleviate environmental problems. Using sunlight to decompose water under the action of a catalyst to produce hydrogen can convert solar energy into chemical energy (hydrogen energy) and effectively store solar energy, which has very high research value. The development of photocatalysts with good stability and photoactivity is the key to the field of...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J37/08B01J37/34C01B3/04
CPCC01B3/042B01J27/24B01J37/082B01J37/344C01B2203/1058C01B2203/1082B01J35/393B01J35/399B01J35/39Y02E60/36
Inventor 董玉明张会珍赵辉赵云霏赵爽赵娜
Owner JIANGNAN UNIV
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