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Simple preparation method of amorphous nickel phosphide/graphene-like carbon-nitrogen compound composite catalyst

A technology of olefinic carbon nitrogen compounds and composite catalysts, which is applied in the field of photocatalytic hydrogen production and material science, can solve problems such as crises, and achieve the effects of reducing costs, improving catalytic efficiency, and simple methods

Inactive Publication Date: 2017-09-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the current problems of environmental pollution and energy crisis, and create a simple method to prepare an amorphous nickel phosphide / graphene-like carbon-nitrogen compound catalyst, thereby reducing the cost of photocatalysts and increasing the hydrogen production rate of photocatalytic decomposition of water

Method used

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  • Simple preparation method of amorphous nickel phosphide/graphene-like carbon-nitrogen compound composite catalyst
  • Simple preparation method of amorphous nickel phosphide/graphene-like carbon-nitrogen compound composite catalyst
  • Simple preparation method of amorphous nickel phosphide/graphene-like carbon-nitrogen compound composite catalyst

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Effect test

Embodiment 1

[0018] (1) Take 20g of thiourea and place it in 4 crucibles, place the crucibles in a muffle furnace and raise the temperature to 550°C at a rate of 2 degrees per minute, calcinate for two hours, take out the crucibles when the temperature drops to room temperature, and grind the solid into Powder, put the crucible containing the solid powder in a muffle furnace, raise the temperature to 500°C at a rate of 2°C per minute, calcinate for two hours, and take out the yellow-white solid powder after cooling down to room temperature to obtain graphene-like carbon nitrogen compounds;

[0019] (2) Get 30mg of graphene carbonitride and place it in a 25mL single-necked flask, then add 4mL of nickel sulfide aqueous solution (0.1mol / L), 4mL of sodium hypophosphite (molecular formula NaH 2 PO 2 ) aqueous solution (0.7mol / L), 2mL of water, ultrasonic dispersion treatment for 30s, and then use nitrogen degassing for 40min to remove oxygen in the reaction system;

[0020] (3) After the degas...

Embodiment 2

[0023] (1) 5 mg of the graphene-like carbonitride in Example 1 is placed in a 25 mL round-bottomed flask, then 2 mL of triethanolamine and 8 mL of water are added, ultrasonically dispersed for 30 s, and then nitrogen degassing is used to remove oxygen in the reaction system for 40 min; The round bottom flask was irradiated under 300W xenon light (equipped with AM 1.5G filter). After the reaction, the hydrogen gas generated in the reaction was detected by thermal conductivity-gas chromatography. After 2 hours of reaction, the hydrogen production rate was 27 μmol g -1 h -1 .

Embodiment 3

[0025] Put 5 mg of the amorphous nickel phosphide / graphene-like carbonitride composite catalyst in Example 1 into a 25 mL round bottom flask, then add 2 mL of triethanolamine and 8 mL of water. Ultrasonic treatment for 30s, use nitrogen degassing for 40min to remove oxygen in the system, place the round bottom flask under the solar simulator for light, after the reaction, use thermal conductivity-gas chromatography to detect the hydrogen generated in the reaction, and react for 2h to produce hydrogen The rate is 8585 μmol g -1 h -1 , which is 317 times faster than that of pure graphene-like carbonitrides.

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Abstract

The invention aims at solving the problems of environment pollution and energy crisis at present and discloses a simple preparation method of a nickel / graphene-like carbon-nitrogen compound composite catalyst, so that cost of a photocatalyst is reduced and hydrogen production rate during photocatalytic decomposition of water is increased. The preparation method of the composite catalyst is environment-friendly, and the principle is that that a graphene-like carbon-nitrogen compound is taken as a photosensitizer and a photoreduction method is used for preparing an amorphous nickel phosphide / graphene-like carbon-nitrogen compound composite catalyst. The prepared amorphous nickel phosphide / graphene-like carbon-nitrogen compound composite catalyst is simple in synthetic method, high in photocatalytic hydrogen production rate, good in stability and low in cost, can greatly save cost when being applied to industrial production and is nontoxic and environment-friendly, and therefore, the prepared amorphous nickel phosphide / graphene-like carbon-nitrogen compound composite catalyst is a novel catalysis material with larger industrial photocatalysis hydrogen production prospect.

Description

technical field [0001] The invention proposes a simple preparation method of an amorphous nickel phosphide / 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] Global environmental pollution and energy crisis are becoming more and more serious, and the development of new sustainable energy has attracted the attention of countries all over the world. Among them, hydrogen is considered to be the most ideal energy source because of its abundant sources, high combustion value, and clean and pollution-free combustion products. Hydrogen production by splitting water is one of the important methods to achieve large-scale production of hydrogen. Using solar energy to decompose water to produce hydrogen, and converting solar energy into chemical energy stored in hydrogen energy, provides a cheap and convenient way to obtain hydrogen. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02C01B3/04
CPCC01B3/042B01J27/24C01B2203/0277C01B2203/1094C01B2203/1058B01J35/39B01J35/40Y02E60/36
Inventor 董玉明孔令刚郑钰王光丽蒋平平
Owner JIANGNAN UNIV
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