Catalyst and preparation method thereof and method for producing hydrogen by photocatalytically decomposing water

Abstract

The invention relates to a catalyst with a fast hydrogen production rate and a preparation method thereof, and a method for photocatalytically decomposing water to produce hydrogen. The catalyst is in C 3 N 4 A compound formed by doping Ni-Al-LDH, the mass ratio of Ni-Al-LDH and C3N4 in the compound is 1:(1.5-19). The preparation method of this catalyst is: Ni-Al-LDH and C 3 N 4 According to the mass ratio of 1: (1.5-19), mix and grind until the two materials are powdery; add the mixed powder after grinding to a solvent to form a suspension; centrifuge the suspension to obtain an isolate; dry the isolate to obtain catalyst. The method for producing hydrogen by using the catalyst is as follows: placing the above-mentioned catalyst in a reaction solution including water and methanol; and irradiating the reaction solution with light with a wavelength of 0nm-780nm to generate hydrogen. The catalyst of the present invention, the catalyst prepared by the method of the present invention, and the photocatalytic water splitting hydrogen production method of the present invention all have the advantage of fast hydrogen production by photolytic water splitting.

Description

【Technical field】 [0001] The invention relates to the field of hydrogen production, in particular to a catalyst with a fast rate of photo-splitting water to produce hydrogen, a method for manufacturing the catalyst, and a method for producing hydrogen with the catalyst. 【Background technique】 [0002] With the development of the world, the pollution on the earth is becoming more and more serious, and it is urgent to find an energy source to replace petroleum. Hydrogen is the most abundant energy on earth, and it is safe, efficient and clean. However, the production of hydrogen is difficult, which restricts the development of hydrogen as an alternative energy source. At present, the research on the direction of hydrogen production by photo-splitting water has become a research hotspot. Catalysts are needed for photocatalytic water splitting to produce hydrogen, but in the prior art, the hydrogen production rate of catalysts is low, which cannot meet the needs of hydrogen pr...

AI Technical Summary

Problems solved by technology

At present, the catalysts made by LDH materials are not ideal in the field of photocatalytic water splitting. For example, the patent application number CN201110376582. Using the co-precipitation method, a series of layered hydrotalcite photocatalysts for photo-splitting water to produce hydrogen were synthesized. The hydrogen production rate was only 0.314 mmol per gram of catalyst per hour (0.314 mmol / h), and the hydrogen production effect was not ideal.

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