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A carbon-coated cobalt oxide and its simple and controllable preparation method

A cobalt oxide and carbon coating technology, which is applied in the preparation/purification of carbon, cobalt oxide/cobalt hydroxide, etc., can solve the problems of expensive and long reaction time, and achieve the effect of low cost, high crystal quality and cheap raw materials

Active Publication Date: 2017-05-03
菏泽维特食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these methods usually require expensive instruments, stringent experimental conditions, and / or long reaction times

Method used

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  • A carbon-coated cobalt oxide and its simple and controllable preparation method
  • A carbon-coated cobalt oxide and its simple and controllable preparation method
  • A carbon-coated cobalt oxide and its simple and controllable preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 1.5 g of cobalt nitrate, 0.7 g of citric acid, and 0.01 g of ammonium nitrate, respectively, to prepare an aqueous solution, stir and dissolve until a transparent solution is obtained. The solution was heated to 80 °C, and the water was continuously evaporated to a viscous gel state. The gel was heated in an environment of 140 °C, and the gel self-propagatingly burned within a few minutes to obtain a black loose powder. The obtained powder is added to ethanol for cleaning and dried.

Embodiment 2

[0025] Weigh 1.5 g of cobalt nitrate, 1 g of citric acid, and 0.1 g of ammonium nitrate, respectively, to prepare an aqueous solution, stir and dissolve until a transparent solution is obtained. The solution was heated to 100 °C, and the water was continuously evaporated to a viscous gel state. The gel was heated in an environment of 200 °C, and the gel self-propagatingly burned within a few minutes to obtain a black loose powder. The obtained powder is added to ethanol for cleaning and dried.

Embodiment 3

[0027] Weigh 0.7 g of cobalt chloride, 0.4 g of glycine, and 0.4 g of ammonium nitrate, respectively, to prepare an aqueous solution, stir and dissolve until a transparent solution is obtained. The solution was heated to 50 °C, and the water was continuously evaporated to a viscous gel state. The gel was heated in an environment of 290 °C, and the gel self-propagatingly burned within a few minutes to obtain a black loose powder. The obtained powder is added into deionized water, washed, and dried.

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Abstract

The invention belongs to the fields of a novel material, a novel energy and a semiconductor, and especially relates to a carbon-coated cobalt oxide (CoO, Co2O3 or Co3O4) and a simple controllable preparation method. The method comprises the following steps: weighting soluble cobalt salt, an organic fuel and a combustion auxiliary agent to prepare an aqueous solution, stirring and dissolving to obtain a transparent solution; heating the solution to 50-100 DEG C, continuously drying to a viscous gel state; heating the gel to 140-290 DEG C, generating self-propagating combustion on gel to obtain black loosening powder; adding the obtained powder in the solvent, and cleaning and drying to obtain the high-purity object material. The method has the advantages of simple and easy operation process, and easily available raw materials with low cost. The prepared cobalt oxide has high crystallization quality, the black carbon enhances conductive capability, and the carbon-coated cobalt oxide is expected to be used in the fields of high efficiency photocatalysis, photodetection, solar energy battery and dilute magnetic semiconductor devices. The method has the advantages of low technical cost, prevention of conventional multi-step complex process, long technology period and expensive equipment, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the fields of new materials, new energy and semiconductors, and in particular relates to a carbon-coated cobalt oxide and a simple and controllable preparation method thereof, which have important application prospects in magnetic materials, catalysis, lithium-ion batteries, solar batteries and other fields. Background technique [0002] Cobalt oxide has excellent photoelectromagnetic properties and catalytic properties, and has become a research hotspot in the field of inorganic materials. Cobalt oxide is an important inorganic functional material. It has abundant reserves of iron, low price, and low biological toxicity. It has broad potential application prospects in the fields of magnetic recording, magnetic fluid, catalysis, and biomedicine. [0003] At present, there are various methods for preparing cobalt oxide materials. The preparation methods of cobalt oxide powder alone include three categories: solid-phase method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04C01B32/05
Inventor 夏国栋刘宏王素梅
Owner 菏泽维特食品有限公司