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A simple preparation method of highly dispersed nickel-oxygen cluster-modified carbon nitride photocatalyst for water splitting and hydrogen production

A photocatalyst and high-dispersion technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve complex and special problems such as methods, achieve simple preparation process, increase hydrogen production, and no secondary pollution effect

Active Publication Date: 2018-01-12
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methods for preparing single-atom, cluster catalysts or co-catalysts are relatively complicated and special

Method used

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  • A simple preparation method of highly dispersed nickel-oxygen cluster-modified carbon nitride photocatalyst for water splitting and hydrogen production
  • A simple preparation method of highly dispersed nickel-oxygen cluster-modified carbon nitride photocatalyst for water splitting and hydrogen production
  • A simple preparation method of highly dispersed nickel-oxygen cluster-modified carbon nitride photocatalyst for water splitting and hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the loading amount of NiO in the photocatalyst is 9%, 1.0g g-C 3 N 4 , 0.288g of nickel chloride hexahydrate, 70.0g of deionized water were added to the beaker, then ammonia water was added to adjust the pH value to 11, stirred at room temperature for 8 hours and then allowed to stand for 6 hours, then all the water was evaporated to dryness at 100°C, and then Calcined at 300°C for 3 hours to obtain highly dispersed nickel-oxygen cluster-modified two-dimensional carbon nitride photocatalyst.

Embodiment 2～7

[0032] According to the method of Example 1, two-dimensional carbon nitride photocatalysts modified with highly dispersed nickel-oxygen clusters with NiO loadings of 0.5%, 1%, 3%, 5%, 7%, and 10% were sequentially prepared.

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Abstract

The invention discloses a simple preparation method for a highly dispersed nickel oxygen cluster modified carbon nitride photocatalyst for water splitting and hydrogen production. A simple impregnation-precipitation method is used to combine g-C3N4, nickel chloride hexahydrate and deionized water. After adjusting the pH value of the mixture with ammonia water, stir and let it stand at room temperature, then evaporate all the water to dryness at 100 to 150°C, and then calcine to obtain a highly dispersed nickel oxygen cluster-modified two-dimensional carbon nitride photocatalyst. The preparation process of the photocatalyst of the present invention is simple, and the obtained photocatalyst has a large specific surface area. NiO is loaded on the two-dimensional g-C3N4 surface in the form of highly dispersed nickel oxygen clusters, which increases the number of reaction active sites of the photocatalyst and improves the degree of visible light response. Compared with the granular NiO / g-C3N4 photocatalyst, the photocatalyst of the present invention shows better photocatalytic performance when used to catalyze water splitting and hydrogen production. Under the same NiO loading amount, the hydrogen production is increased by 7 to 8 times.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic decomposition of water to produce hydrogen, and in particular relates to a simple preparation method of a highly dispersed nickel-oxygen cluster modified carbon nitride photocatalyst for decomposing water to produce hydrogen. Background technique [0002] Photocatalytic water splitting hydrogen production based on sunlight as the driving force and semiconductor materials is considered to be the most promising solar energy conversion technology and the technical basis for the realization of the future hydrogen economy, which has always attracted great interest from scientists around the world. In the past 40 years, a lot of research and exploration have been carried out around improving the utilization rate of solar energy and photon conversion efficiency of catalysts at home and abroad, and gratifying research progress has been made. At present, thousands of inorganic semiconductor materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24C01B2203/1058C01B2203/1082B01J35/39Y02E60/36
Inventor 顾泉刘建妮高子伟张伟强
Owner SHAANXI NORMAL UNIV