Catalyst and preparation method thereof and method for producing hydrogen through photocatalytic decomposition

Abstract

The invention relates to a catalyst and a preparation method thereof, and a method for producing hydrogen through photocatalytic decomposition. The catalyst is a compound formed by doping Ni-Al-LDH in C3N4, and the mass ratio of Ni-Al-LDH to C3N4 in the compound is 1:(1.5-19). The preparation method of the catalyst comprises the following steps: mixing and grinding the Ni-Al-LDH and C3N4 according to the mass ratio of 1:(1.5-19) until the two materials are powdery; adding the ground mixed powder into a solvent to form a suspension; centrifuging the suspension to obtain an isolate; and drying the isolate to obtain the catalyst. The method for producing hydrogen by adopting the catalyst comprises the following steps: placing the catalyst into a reaction liquid containing water and methanol; and irradiating the reaction liquid by adopting light with wavelength of 0nm-780nm, to generate hydrogen. The catalyst and a preparation method thereof, and the method for producing hydrogen through photocatalytic decomposition have the advantage that the speed of producing hydrogen through photocatalytic decomposition is fast.

Description

[0001] 【Technical field】 [0002] 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. [0003] 【Background technique】 [0004] 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...

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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