Photocatalytic material capable of being used for reducing nitrogen to produce ammonia as well as preparation method and application of photocatalytic material

Abstract

The invention provides a photocatalytic material capable of reducing nitrogen to produce ammonia as well as a preparation method and application of the photocatalytic material. The photocatalytic material capable of being used for reducing nitrogen to produce ammonia, provided by the invention, comprises palladium particles and a CeO2 layer coating the palladium particles. The photocatalytic material has absorption in the wavelength range of 200-1300 nm, has a high solar energy utilization rate in a photocatalytic nitrogen reduction ammonia production reaction, also has rich oxygen vacancies, has strong adsorption capacity to nitrogen, and is beneficial to catalytic reaction, so that the material can show excellent properties of photocatalytic reduction of nitrogen to produce ammonia under visible and near-infrared illumination without adding a hole sacrifice agent into a reaction system at normal temperature and normal pressure, is good in stability and can be repeatedly used for multiple times.

Description

technical field [0001] The invention relates to a photocatalytic material capable of reducing nitrogen to produce ammonia, a preparation method and application thereof. Background technique [0002] Ammonia is not only an important nitrogen source for artificial nitrogen fertilizers, but also an important raw material for chemical industries such as textiles and pharmaceuticals. The current method of industrial ammonia synthesis is mainly the Haber-Bosch method in the 20th century, but this method requires high temperature and high pressure to achieve the dissociation of nitrogen, accompanied by a large amount of greenhouse gas emissions, resulting in a large amount of energy consumption , but also cause environmental pollution. Therefore, it is of great significance to find cheap, efficient, green and energy-saving ammonia synthesis technology. [0003] Currently, ammonia synthesis methods mainly include biological nitrogen fixation, electrochemical catalytic nitrogen fix...

AI Technical Summary

Problems solved by technology

However, the current catalyst materials for photocatalytic nitrogen fixation rarely have the absorption properties in the infrared spectral region, so that a large amount of sunlight in the infrared spectral region is wasted.

low solar utilization

However, in the existing materials with absorption properties in the infrared spectral region, the proportion of noble metals in the catalyst is very high, and the cost is expensive.

[0006] Second, the yield of photocatalytic reduction of nitrogen to ammonia is low

However, this approach increases the cost of the reaction

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