Preparation method and application of cerium dioxide with different defect degrees

A technology of ceria and defects, which is applied in the field of ceria preparation, can solve the problems of limitation, easy agglomeration, and easy recombination of photogenerated carriers, and achieve the effects of low cost, simple operation, and easy control of reaction conditions
CN113680342APending Publication Date: 2021-11-23安徽工业技术创新研究院六安院
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
安徽工业技术创新研究院六安院
Publication Date
2021-11-23

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Abstract

The invention discloses a preparation method of a catalyst for dimethyl carbonate synthesis, which comprises the following steps: taking a cerium source cerium nitrate hexahydrate, combining the cerium source cerium nitrate hexahydrate with a pH regulator trisodium phosphate, and carrying out hydrothermal synthesis to obtain octahedral CeO2; using a plasma enhanced chemical vapor deposition (PECVD) discharge device for generating plasma flow, directly applying the plasma flow on the surface of the dried CeO2 powder, and obtaining uniformly dispersed CeO2 nanoparticles with different defect degrees after discharge is completed under different parameters; and mixing the treated CeO2 catalyst with methanol, and carrying out photo-thermal catalysis on synthesis of DMC under the conditions of specific pressure, temperature and illumination. The method has the advantages of easily available raw materials, simple operation, easily controllable reaction conditions, low cost, no hazardous waste gas in the reaction process, and environmental protection.
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Description

Technical field

[0001] The present invention relates to CeO 2 In the field of preparation, specifically a preparation method and application of cerium dioxide with different defect levels. Background technology

[0002] With the rapid development of economy and science and technology, energy problems and environmental problems are becoming increasingly severe. At the same time, due to the increasing awareness of personal environmental crisis, people's dependence on and demand for non-toxic and environmentally friendly green chemicals continues to rise. Among them, dimethyl carbonate, as a non-toxic and easily degradable non-polar protic solvent, is widely used in various industries and has become a recognized harmless chemical and organic green solvent in the chemical industry.

[0003] Most of the traditional production processes of dimethyl carbonate are about to be eliminated due to backward technology and polluting raw materials and products. And CO 2 The one-step dir...

Claims

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