Preparation method of Mo or Fe doped Zn1-xIn2S4 catalyst for photocatalytic nitrogen fixation and ammonia synthesis

Abstract

The invention discloses a preparation method of a Mo or Fe doped Zn1-xIn2S4 catalyst for photocatalytic nitrogen fixation and ammonia synthesis. The method comprises the following steps: dissolving zinc nitrate hexahydrate, indium nitrate and L-cysteine into deionized water under a magnetic stirring condition, adding an inorganic salt containing molybdenum or iron, conducting magnetic stirring, transferring a mixed solution into a hydrothermal reaction kettle, putting the hydrothermal reaction kettle into a blast drying oven together, and conducting drying to obtain a precursor; and carrying out hydrothermal reaction for 15-24 hours, conducting cooling to room temperature to obtain a yellow-green precipitate, washing the yellow-green precipitate with deionized water and ethanol in sequence, repeatedly carrying out centrifugal washing for 3-5 times, and conducting drying in a blast drying oven at the temperature of 60-100 DEG C for the whole night to obtain the Mo or Fe doped Zn1-xIn2S4photocatalytic nitrogen fixation catalyst. The Mo or Fe doped Zn1-xIn2S4 photocatalytic nitrogen fixation catalyst provided by the invention is high in nitrogen fixation efficiency and simple in preparation method, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a Mo or Fe doped Zn for photocatalytic nitrogen fixation and synthesis of ammonia 1-x In 2 S 4 Catalyst preparation method. Background technique [0002] Ammonia is not only a widely used chemical raw material, but also serves as an important energy carrier. Ammonia synthesis by the Haber process is considered to be one of the greatest inventions of the 20th century and has made great contributions to the development of human society. At the same time, the ammonia synthesis process needs to consume 1%-2% of the world's total energy every year. Therefore, the development of green and clean ammonia synthesis methods has always been a hot topic in industry and academia worldwide. With the vigorous development of artificial photosynthetic solar fuel research, the use of solar photocatalysis to synthesize ammonia under mild conditions has attracted more and more researchers' inter...

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Problems solved by technology

[0006] (2) The main problem of the carbon nitride-based photocatalytic nitrogen fixation catalyst is that the nitrogen in the carbon nitride catalyst will generally precipitate during the photocatalytic nitrogen fixation reaction, which will greatly interfere with the accuracy of the photocatalytic nitrogen fixation synthetic ammonia yield detection

[0007] (3) The efficiency of photocatalyst nitrogen fixation and ammonia synthesis currently developed is still low, generally tens of µmol·g -1 h -1 , is far from the goal of actual industrial production. Therefore, it is necessary to develop a new photocatalytic nitrogen fixation catalyst system to improve the efficiency of photocatalytic nitrogen fixation and synthesis of ammonia.

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