Cu2O ultra-fine nano-particles and self-assembly nanospheres as well as preparation method thereof

Abstract

The invention discloses Cu2O ultra-fine nano-particles and self-assembly nanospheres as well as a preparation method thereof, relating to the preparation method of the nano-particles. A whole reaction mixed liquid is divided into two phases through regulating the proportion of each substance in a reaction system, wherein one phase contains metal salt while the other phase contains a reducing agent. The metal salt is released to the phase containing the reducing agent, and contacted with the reducing agent at a part close to the interface of two phases to carry out reduction reaction, and the release action and a protecting agent in the reaction system commonly act in the whole reaction system so as to achieve the aim of controlling the appearances and the sizes of the product Cu2O ultra-fine nano-particles. The Cu2O ultra-fine nano-particles can be prepared by using the release method; if the reaction mixed liquid containing the Cu2O ultra-fine nano-particles continuously keeps the temperature for certain time at certain temperature, Cu2O self-assembly nanospheres with larger particle sizes formed by self-assembling the Cu2O ultra-fine nano-particles are prepared due to the Ostwald maturating action.

Description

technical field [0001] The invention relates to a preparation method of nanoparticles, in particular to a method of controlling the addition rate of main reaction drugs by a slow release method and then preparing ultrafine Cu 2 O nanoparticles and their method of self-assembling nanospheres. Background technique [0002] Nanoparticles cause the small size effect due to their small size (from one nanometer to several hundred nanometers). This effect causes a qualitative change in the properties of nanoparticles compared with bulk materials, leading to a series of peculiar physical phenomena, which also makes nanoparticles have the potential to be used in new fields. Cu 2 O nanoparticles, especially ultrafine Cu 2 O nanoparticles (particle size below 10nm), as a P-type semiconductor, have broad application prospects in the fields of magnetic devices, solar energy conversion, catalysts, electrode materials, etc. (1. Maji T.K., Matasuda R., Kitagawa S, Nat .Mater.2007, 6, 14...

AI Technical Summary

Problems solved by technology

[0004] Publication number is that the invention patent application of CN1693204 provides a kind of Cu 2 The disadvantage of the preparation method of O nanoparticles is that the solvent used in the preparation is water, which cannot solve the problem of agglomeration caused by the too strong polarity of water, so that ultrafine Cu cannot be prepared. 2 O nanoparticles; in addition, the reducing agent used in this method is hydrazine hydrate, because hydrazine hydrate has extremely strong reducibility, has strong toxicity to organisms, so using hydrazine hydrate as a raw material not only poses a threat to the health of operators In the production process, the complexity of the production process and production equipment is increased due to the need for additional protection of personnel and equipment, and it poses a hazard to the environment

[0005] The invention patent application with publication number CN1384055 provides a reduction method to prepare Cu 2 The method of O nanowire, its shortcoming and publication number are the same as the method of CN1693204, also is to use hydrazine hydrate as reducing agent, cause harm to environment

[0006] All in all, the existing Cu 2 The preparation and application of O nanoparticles are still in their infancy

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