A rapid preparation method of core-shell carbon-coated nano-copper catalyst

Abstract

The invention relates to a rapid preparation method of a core-shell carbon-coated nano-copper catalyst, which aims at the disadvantages of dimethyl carbonate catalyst synthesis, using copper acetate, absolute ethanol, formaldehyde, deionized water, and hydrochloric acid as raw materials, and preparing Solution, solvothermal synthesis, soaking in acid solution, cleaning, and drying to make a core-shell carbon-coated nano-copper catalyst. This preparation method is advanced in technology, fast in speed, and low in cost. The product is powder with a particle diameter of ≤400nm and good product purity. , up to 98.5%, and the catalytic performance is stable and reliable. It is an ideal rapid preparation method for core-shell carbon-coated nano-copper catalysts.

Description

technical field [0001] The invention relates to a rapid preparation method of a core-shell carbon-coated nano-copper catalyst, which belongs to the technical field of preparation and application of carbon-based composite materials. Background technique [0002] Dimethyl carbonate is a new type of chemical raw material, which is a non-toxic chemical and has a good application prospect. In the synthesis process of dimethyl carbonate, the vapor phase oxidative carbonylation of methanol uses methanol, CO and O 2 As a raw material, carbon-based supported nano-copper is used as a catalyst, the production cost is low, and the product selectivity is high. It is a green chemical route using coal as a raw material. For example, CN103709040A and CN102872879A patents all adopt this method; The crystal surface energy is high, and it is easy to agglomerate during the reaction process, which leads to the deactivation of the copper active material and greatly affects the catalytic performa...

AI Technical Summary

Problems solved by technology

In the synthesis process of dimethyl carbonate, the vapor phase oxidative carbonylation of methanol uses methanol, CO and O 2 As a raw material, carbon-based supported nano-copper is used as a catalyst, the production cost is low, and the product selectivity is high. It is a green chemical route using coal as a raw material. For example, CN103709040A and CN102872879A patents all adopt this method; The surface energy of the crystal is high, and it is easy to agglomerate during the reaction process, which leads to the deactivation of the copper active material and greatly affects the catalytic performance.

[0003] Core-shell nanomaterials are a new type of functional material with high stability and good interface properties. Nanocapsules with carbon as the shell can enhance the chemical and thermal stability of copper nanoparticles, which can overcome agglomeration and oxidation. For example, the CN103599781A patent uses glucose, sodium oleate, and hexane to prepare, but the preparation process has many raw materials and complicated processes, and there are many disadvantages, and the use effect cannot be achieved.

Images