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Method for preparing double-shell CoO/Co3O4 hollow nanoparticles

A technology of hollow nanoparticles and particles, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex methods and few researches and preparations of hollow cobalt oxide nanomaterials in the shell, etc. Achieve the effects of simple process, high product quality and safe operation

Active Publication Date: 2014-07-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method of synthesizing cobalt oxides is still relatively complicated, and there are few researches on the preparation of hollow cobalt oxide nanomaterials.

Method used

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  • Method for preparing double-shell CoO/Co3O4 hollow nanoparticles
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  • Method for preparing double-shell CoO/Co3O4 hollow nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 1mmol of cobaltous acetylacetonate (0.2571g) and dissolve it in 20ml of octadecene, measure oleic acid and oleylamine (accounting for 20% of the entire reaction system), add it to the above solution at a molar ratio of 4:10, and transfer to In a 40ml reaction kettle, stir evenly for 10 minutes, seal the reaction kettle, raise the temperature to 260°C, and keep it warm for 8 hours. The product obtained by the reaction was centrifuged, washed and dried to obtain a tan powder. like figure 1 Shown product is identified as cobaltous oxide through X-ray powder diffraction; Carry out morphology analysis to cobaltous oxide with transmission electron microscope (TEM), from figure 2 It can be seen that its morphology is double-layer hollow nanoparticles; the morphology of cobaltous oxide is analyzed by scanning electron microscope (SEM), and the image 3 It can be seen that the morphology is hollow nanoparticles.

Embodiment 2

[0035] Weigh 1mmol of cobaltous acetylacetonate (0.2571g) and dissolve it in 20ml of octadecene, measure oleic acid and oleylamine (accounting for 20% of the entire reaction system), add it to the above solution at a molar ratio of 4:10, and transfer to In a 40ml reaction kettle, stir evenly for 10 minutes, seal the reaction kettle, raise the temperature to 260°C, and keep it warm for 1 hour. The product obtained by the reaction was centrifuged, washed and dried to obtain a tan powder. The morphology of cobaltous oxide was analyzed by transmission electron microscopy (TEM). Figure 4 It can be seen that its morphology is cobaltous oxide solid nanoparticles.

Embodiment 3

[0037] Weigh 1mmol of cobaltous acetylacetonate (0.2571g) and dissolve it in 20ml of octadecene, measure oleic acid and oleylamine (accounting for 20% of the entire reaction system), add it to the above solution at a molar ratio of 4:10, and transfer to In a 40ml reaction kettle, stir evenly for 10 minutes, seal the reaction kettle, raise the temperature to 260°C, and keep it warm for 2 hours. The product obtained by the reaction was centrifuged, washed and dried to obtain a tan powder. The morphology of cobaltous oxide was analyzed by transmission electron microscopy (TEM). Figure 5 It can be seen that the products are cobaltous oxide solid nanoparticles and partial cobaltous oxide hollow nanoparticles.

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Abstract

The invention discloses a method for preparing double-shell CoO / Co3O4 hollow nanoparticles. The method for preparing double-shell CoO / Co3O4 hollow nanoparticles, provided by the invention, comprises the following step of mixing organometallic cobalt salt with an organic solvent, firstly preparing double-shell CoO hollow nanoparticles under high temperature and high pressure conditions, and then preparing double-shell Co3O4 hollow nanoparticles by a high temperature calcining process. The cobalt monoxide and cobalt oxide, prepared by the method disclosed by the invention, have the characteristics of high purity, uniform particle size, strong oxidation resistance, excellent magnetic performance and the like. The double-shell CoO / Co3O4 hollow nanoparticles have the advantages of good quality, simple technological process, wide range of application, and broad application prospects in preparation of lithium batteries, biomedical drug / gene transduction and energy storage.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a double shell CoO, Co 3 o 4 Preparation method of hollow nanoparticles. Background technique [0002] Due to the structural characteristics of large internal space and multi-phase heterogeneous interface, hollow shell nanomaterials have broad application prospects in the preparation of lithium batteries, catalysis, sensing, drug carriers, and bioimaging. It is well known that the transition metal cobalt and its oxides have excellent magnetic properties and electrochemical properties, so the preparation methods and properties of cobaltous oxide and cobaltous oxide nanoparticles are one of the hot topics today. Combining the material itself and structural characteristics, a variety of synthetic CoO and Co have been developed in recent years. 3 o 4 Nanoparticle method, and also prepared CoO and Co with different morphology characteristics 3 o 4 Nanoparticles. K.J.An and N...

Claims

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Application Information

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IPC IPC(8): C01G51/04B82Y30/00B82Y40/00
Inventor 刘小鹤张丹邱冠周
Owner CENT SOUTH UNIV
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