Simple preparation method of high-dispersion nickel oxide cluster modified carbon nitride photocatalyst for decomposing water to produce hydrogen

Abstract

The invention discloses a simple preparation method of a high-dispersion nickel oxide cluster modified carbon nitride photocatalyst for decomposing water to produce hydrogen. The simple preparation method comprises the following steps: adjusting the pH (Potential of Hydrogen) value of a mixture of g-C3N4, nickel chloride hexahydrate and de-ionized water with ammonia water by adopting a simple impregnation-precipitation method; stirring and standing at room temperature; evaporating to remove all the water at 100 DEG C to 150 DEG C; calcining to obtain the high-dispersion nickel oxide cluster modified two-dimensional carbon nitride photocatalyst. The preparation process of the photocatalyst is simple; the prepared photocatalyst has a large specific surface area and NiO is loaded on the surface of the two-dimensional g-C3N4 in a high-dispersion nickel oxide cluster form, so that the quantity of reaction active sites of the photocatalyst is increased and the visible light response degree is improved. Compared with a granular NiO/g-C3N4 photocatalyst, the photocatalyst disclosed by the invention has a more excellent photocatalytic property in a process of catalyzing the decomposition of the water to produce the hydrogen; under the condition that NiO loading amounts are the same, the yield of the hydrogen is improved 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...

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Problems solved by technology

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

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