A preparation method of cobaltous oxide nanocrystals and cobaltous oxide nanocrystals prepared therefrom

Abstract

The invention provides a method for preparing cobaltous oxide nanocrystals and the prepared cobaltous oxide nanocrystals. The preparation method comprises the following steps: using cobalt salt and triphenylphosphine as precursors, completely dissolving the precursors in oleylamine, reacting in a closed environment for 10-20 hours, washing and drying to obtain cobaltous oxide nanocrystals, The reaction temperature is 120-180°C, the purity of the cobalt salt is ≥99.5%, and the mass ratio of the cobalt salt to triphenylphosphine is ≥1:10. In the preparation method of cobaltous oxide nanocrystals of the present invention, cobaltous oxide nanocrystals are prepared by hydrothermal reaction of specific purity cobalt salt and triphenylphosphine under certain temperature conditions, with complete grain development, uniform particle size distribution, and There is less agglomeration, and the reaction raw materials of the preparation method of the present invention are easy to obtain, the production cost is low, the uneven particle size distribution and the mixing of impurities caused by the sintering process are avoided, and the industrial 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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