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In-situ grown three-dimensional multi-structural cobaltosic oxide/carbon composite micro-nanomaterial and controllable preparation method thereof

A technology of in-situ growth of cobalt trioxide, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., to achieve the effects of wide application range, strong operability and simple method

Active Publication Date: 2015-11-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, developing a simple in situ controllable preparation method can obtain a variety of Co with specific uniform morphology, uniform size and three-dimensional hierarchical structure. 3 o 4 Micro-nano materials and the construction of their composite systems are of great significance, and have not yet been reported in the literature

Method used

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  • In-situ grown three-dimensional multi-structural cobaltosic oxide/carbon composite micro-nanomaterial and controllable preparation method thereof
  • In-situ grown three-dimensional multi-structural cobaltosic oxide/carbon composite micro-nanomaterial and controllable preparation method thereof
  • In-situ grown three-dimensional multi-structural cobaltosic oxide/carbon composite micro-nanomaterial and controllable preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]Mix 4mmol cobalt nitrate hexahydrate and 10mmol ammonium fluoride evenly, add 30ml deionized water to disperse and stir for 5min. Dissolve 20mmol urea in 20ml deionized water, add the above solution, disperse and stir for 5min. The above mixed solution was transferred to the polytetrafluoroethylene liner of the autoclave, put into the pretreated base conductive glass, and reacted at 110°C for 5 hours at a closed constant temperature, and then cooled naturally to room temperature. The obtained reaction product was washed 3 times with deionized water, dried at 80°C for 4h, and calcined at 300°C for 6h at a heating rate of 1°C / min to obtain a dandelion-shaped three-dimensional hierarchical structure Co 3 o 4 micro-nano materials.

[0035] Co 3 o 4 The micro-nano material is immersed in 1M carbon-rich compound solution for 12 hours. The above product was calcined at a rate of 1°C / min in nitrogen, and calcined at 300°C for 6 hours to obtain a dandelion-shaped three-dimen...

Embodiment 2

[0038] Mix 4mmol cobalt nitrate hexahydrate and 20mmol ammonium fluoride evenly, add 30ml deionized water to disperse and stir for 5min. Dissolve 20mmol urea in 20ml deionized water, add the above solution, disperse and stir for 5min. The above mixed solution was transferred to the polytetrafluoroethylene liner of the autoclave, put into the pretreated substrate conductive glass, and reacted at 100°C for 5 hours at a closed constant temperature, and then cooled naturally to room temperature. The obtained reaction product was washed 3 times with deionized water, dried at 80°C for 5h, and calcined at 400°C for 4h at a heating rate of 1°C / min to obtain the sunflower flower-shaped three-dimensional hierarchical structure Co 3 o 4 micro-nano materials.

[0039] Co 3 o 4 The micro-nano material is immersed in a 0.5M carbon-rich compound solution for 24 hours. The above product was calcined at a rate of 1°C / min in nitrogen, and calcined at 500°C for 4 hours to obtain a sunflower...

Embodiment 3

[0042] Mix 5 mmol of cobalt chloride hexahydrate and 10 mmol of ammonium fluoride evenly, add 30 ml of deionized water to disperse and stir for 5 min. Dissolve 25mmol urea in 20ml deionized water, add the above solution, disperse and stir for 5min. The above mixed solution was transferred to the polytetrafluoroethylene liner of the autoclave, put into the pretreated base conductive glass, and reacted at 150°C for 5 hours at a closed constant temperature, and then cooled naturally to room temperature. The obtained reaction product was washed 3 times with deionized water, dried at 90°C for 3h, and calcined at 500°C for 3h at a heating rate of 1°C / min to obtain the thorn-shaped three-dimensional hierarchical structure Co 3 o 4 micro-nano materials.

[0043] Co 3 o 4 The micro-nano material is immersed in a 0.1M carbon-rich compound solution for 36 hours. The above product was calcined at a heating rate of 1°C / min in nitrogen, and calcined at 600°C for 2 hours to obtain a thr...

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Abstract

The invention relates to an in-situ grown three-dimensional multi-structural cobaltosic oxide / carbon composite micro-nanomaterial and its controllable preparation method. A cobalt material, ammonium fluoride and urea are used as raw materials to prepare a cobaltosic oxide micro-nanomaterial with multiple specific-morphologies three-dimensional multi-structures in situ; and the cobaltosic oxide micro-nanomaterial is processed with a carbon-rich solution to obtain a corresponding three-dimensional multi-structural carbon-coated cobaltosic oxide composite structure. The preparation method provided by the invention is simple, has strong operationality, is low-cost and is green and environmentally friendly. Problems of tedious steps, poor combinability between a nano-powder and a substrate, poor repeatability, poor electron-transporting property and the like when the traditional nano-powder is used in a device are solved. The three-dimensional multi-structures and specific morphology of cobaltosic oxide can be effectively maintained. The obtained product has diversified morphologies, is uniform in size, is not easy to agglomerate and has high purity. The three-dimensional pores and multi-structures of the product are beneficial to electron-transport. The product will be hopefully and widely applied in fields of supercapacitor, lithium ion battery, catalysis, magnetic material, sensor, photoelectricity and the like.

Description

technical field [0001] The invention relates to a class of inorganic non-metallic composite materials and a controllable preparation method, in particular to a class of in-situ growth three-dimensional multi-level structure cobalt tetroxide / carbon composite micro-nano materials and a controllable preparation method thereof. Background technique [0002] With the advancement of science and technology, nanomaterials exhibit many unique physical and chemical properties due to their volume effect, surface effect, quantum size, quantum tunneling, and dielectric confinement, such as melting point, vapor pressure, magnetism, optics, thermal conductivity, and electrical conductivity. properties, etc., and its application fields are quite extensive, such as magnetic recording materials, electroacoustic devices, damping devices, mineral processing, ceramics, nanosensors, thermal conductive materials, photoelectric materials, photocatalytic materials, organic degradation, catalysts, med...

Claims

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Application Information

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IPC IPC(8): C01G51/04C01B31/02
Inventor 苗青青张锁江张朋梅
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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