Method for preparing nanocomposite of MnO2/C/Fe2O3 layer-upon-layer structure

A nano-composite material, fe2o3 technology, applied in the field of nano-composite material preparation, can solve problems such as poor electrical conductivity, achieve the effects of inhibiting agglomeration, less environmental pollution, and improving surface chemical properties

Inactive Publication Date: 2015-08-19
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an electrode material, manganese dioxide has poor conductivity

Method used

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  • Method for preparing nanocomposite of MnO2/C/Fe2O3 layer-upon-layer structure
  • Method for preparing nanocomposite of MnO2/C/Fe2O3 layer-upon-layer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh ferric salt, urea, glucose, and 1-butyl-3-methylimidazolium tetrafluoroborate in a molar ratio of 1:5:1:0.1, mix them in 60ml deionized water, stir evenly, and transfer to 100ml In a high-pressure reactor, react at 90°C for 1h. The product obtained from the reaction was calcined at 250 °C for 1 h in an Ar atmosphere to obtain C / Fe 2 o 3 Structured nanocomposites.

[0027] Get the C / Fe prepared by the above steps 2 o 3 , ultrasonically dispersed in the aqueous solution, and then introduced potassium permanganate and manganese chloride according to the molar ratio of 1:1, stirred and mixed evenly, transferred to a 100ml autoclave, and reacted at 120°C for 3h. The product obtained from the reaction was filtered, washed, and dried to obtain MnO 2 / C / Fe 2 o 3 Layer-by-layer nanocomposites.

[0028] The morphology of the obtained nanocomposite is as follows figure 1 , it can be observed from the figure that the MnO 2 / C / Fe 2 o 3 The nanocomposite has a petal...

Embodiment 2

[0031] Weigh ferric chloride, urea, fructose, and N-ethylpyridine tetrafluoroborate in a molar ratio of 1:30:30:10, mix them in 60ml of deionized water, stir evenly, transfer to a 100ml high-pressure reactor, 200 ℃ reaction 48h. The product obtained from the reaction was calcined at 700 °C for 24 h in an Ar atmosphere to obtain C / Fe 2 o 3 Structured nanocomposites.

[0032] Get the C / Fe prepared by the above steps 2 o 3 , ultrasonically dispersed in the aqueous solution, and then introduced potassium permanganate and manganese sulfate according to the molar ratio of 1:0.1, stirred and mixed evenly, transferred to a 100ml high-pressure reactor, and reacted at 200°C for 60h. The product obtained from the reaction was filtered, washed, and dried to obtain MnO 2 / C / Fe 2 o 3 Layer-by-layer nanocomposites.

Embodiment 3

[0034] Weigh iron sulfate, urea, maltose, and 1-ethyl-3-methylimidazolium tetrafluoroborate in a molar ratio of 1:15:15:5, mix them in 60ml deionized water, stir evenly, and transfer to 100ml high-pressure reaction In the kettle, react at 150°C for 24h. The product obtained from the reaction was calcined at 450 °C for 12 h in an Ar atmosphere to obtain C / Fe 2 o 3 Structured nanocomposites.

[0035] Get the C / Fe prepared by the above steps 2 o 3 , ultrasonically dispersed in an aqueous solution, and then introduced potassium permanganate and manganese acetate according to a molar ratio of 1:0.5, stirred and mixed evenly, transferred to a 100ml high-pressure reactor, and reacted at 150°C for 30h. The product obtained from the reaction was filtered, washed, and dried to obtain MnO 2 / C / Fe 2 o 3 Layer-by-layer nanocomposites.

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Abstract

The invention relates to a method for preparing a nanocomposite compounded by MnO2, porous carbon and Fe2O3 layer upon layer. The composite is a nanocomposite of a layer-upon-layer structure with Fe2O3 being a core, porous carbon being a middle layer and MnO2 being an outer shell. First ferric slat, urea, sugar and ion liquid are used as raw materials, a monodispersed C/Fe2O3 composite is obtained through hydrothermal synthesis in one step, then the C/Fe2O3 is used as the core, potassium permanganate and manganese salt are used as raw materials, and the MnO2/C/Fe2O3 nanocomposite having the layer-upon-layer structure is obtained through hydrothermal synthesis. The composite is uniform in size, and has broad application prospects as a supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic nanomaterials and relates to a kind of MnO 2 / C / Fe 2 o 3 Preparation method of nanocomposite material with layer structure. Background technique [0002] With the rapid development of the economy and the rapid growth of the population, problems such as environmental degradation and energy shortage are becoming more and more serious. In order to meet the huge demand for energy for human survival and social development, research on energy storage and conversion devices has gradually attracted people's attention. Supercapacitors (Supercapacitors), also known as Electrochemical Capacitors (Electrochemical Capacitors), is an environmentally friendly, irreplaceable new energy storage and energy-saving device between batteries and traditional capacitors. It not only has the characteristics of fast charging and discharging of traditional capacitors, but also has the energy storage mechanism of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/26H01G11/24H01G11/86B82Y30/00
CPCY02E60/13H01G11/24H01G11/30H01G11/44H01G11/46H01G11/86
Inventor 康晓红董锦洋张路张威
Owner BEIJING JIAOTONG UNIV
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