Preparation method of cobalt oxide nanocrystal and prepared cobalt oxide nanocrystal

Abstract

The invention provides a preparation method of cobalt oxide nanocrystal and the prepared cobalt oxide nanocrystal. The preparation method comprises the following steps of using cobalt salt and triphenylphosphine as precursors, completely dissolving the precursors into oil amine, reacting for 10 to 20h under the closed environment, washing and drying, so as to obtain the cobalt oxide nanocrystal, wherein the reaction temperature is 120 to 180 DEG C, the purity of the cobalt salt is greater than or equal to 99.5%, and the mass ratio of the cobalt salt to the triphenylphosphine is greater than orequal to 1:10. The preparation method of the cobalt oxide nanocrystal has the advantages that the cobalt salt and triphenylphosphine with certain purity are performed with hydrothermal reaction undercertain temperature condition, so as to obtain the cobalt oxide nanocrystal; the development of the crystal grain is complete, the granularity distribution is uniform, and the degree of agglomerationbetween the particles is low; the reaction raw materials are easy to obtain, the production cost is low, the problems of nonuniformity of particle size distribution and mixing of impurities due to sintering process are solved, and the industrialized production is easy.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, and more specifically, to a method for preparing cobaltous oxide nanocrystals and the prepared cobaltous oxide nanocrystals. Background technique [0002] The refinement of nanomaterial grains changes the electronic structure and crystal structure of the grain surface, resulting in surface effects, small size effects, quantum effects, and macroscopic quantum tunneling effects that bulk materials do not have. There is great interest in the study of nanomaterials. In the preparation method of nanomaterials, the nanomaterials synthesized by wet chemical method are not only uniform and controllable in size, but also do not require expensive experimental equipment, and have great potential for commercialization. In the wet chemical method, the sol-gel method and the precipitation method are more complicated than the hydrothermal method. The hydrothermal method refers to the use of wa...

AI Technical Summary

Problems solved by technology

As a new type of material, cobaltous oxide is widely used in magnetic storage, gas sensing, photocatalysis, electrocatalysis, etc. Its preparation method is usually obtained by sintering cobalt salt and alkali at a certain temperature. In the large process, there are usually impurities mixed in, the crystallinity is not high, and the grains are not uniform

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