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MnO2/MnO/Co3O4/C composite material and preparation method thereof

A technology of cobalt tetroxide and carbon composite materials, which is applied in the preparation/purification of manganese oxide/manganese hydroxide, cobalt oxide/cobalt hydroxide, carbon, etc., which can solve the problems of cumbersome operation, many steps, and single valence state of manganese element. To achieve the effect of improving comprehensive performance, easy operation and avoiding negative effects

Inactive Publication Date: 2020-06-12
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing composite materials that have many steps, complicated operations, and the manganese element in the prepared composite materials being in a single valence state, and provide a kind of manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material, the manganese element in the composite material has a mixed valence state, and its preparation method is easy to operate

Method used

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  • MnO2/MnO/Co3O4/C composite material and preparation method thereof
  • MnO2/MnO/Co3O4/C composite material and preparation method thereof
  • MnO2/MnO/Co3O4/C composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0057] A manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material has a core-shell structure, wherein the core is manganese dioxide material, and the shell is manganese oxide / cobalt tetroxide / carbon material.

[0058] A preparation method of manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material, comprising the steps of:

[0059] S1. Cetyltrimethylammonium bromide, n-propanol, and n-hexane are continuously stirred to form solution A, and the mass ratio of cetyltrimethylammonium bromide, n-propanol, and n-hexane is 1 :0.5:0.5;

[0060] S2. Manganese sulfate, aerosol OT, ethanol aqueous solution are formed solution B under continuous stirring, and the mass ratio of the ethanol in manganese sulfate, aerosol OT, ethanol aqueous solution is 5.0 * 10 -4 : 6.2×10 -4 : 0.094, add solution B dropwise to solution A, mix until clear, continue to stir until the second time clear to form microemulsion C, the concentration of manganese sulfate in ...

Embodiment 2

[0064] A manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material has a core-shell structure, wherein the core is manganese dioxide material, and the shell is manganese oxide / cobalt tetroxide / carbon material.

[0065] A preparation method of manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material, comprising the steps of:

[0066] S1. Cetyltrimethylammonium bromide, n-propanol, and n-hexane are continuously stirred to form solution A, and the mass ratio of cetyltrimethylammonium bromide, n-propanol, and n-hexane is 1 :15:20;

[0067] S2. Manganese sulfate, aerosol OT, ethanol aqueous solution are formed solution B under continuous stirring, and the mass ratio of the ethanol in manganese sulfate, aerosol OT, ethanol aqueous solution is 2.5 * 10 -3 : 4.6×10 -3 : 0.16, add solution B dropwise to solution A, mix until clear, continue to stir until the second time clear to form microemulsion C, the concentration of manganese sulfate in sol...

Embodiment 3

[0071] A manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material has a core-shell structure, wherein the core is manganese dioxide material, and the shell is manganese oxide / cobalt tetroxide / carbon material.

[0072] A preparation method of manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material, comprising the steps of:

[0073] S1. Cetyltrimethylammonium bromide, n-propanol, and n-hexane are continuously stirred to form solution A, and the mass ratio of cetyltrimethylammonium bromide, n-propanol, and n-hexane is 1 :3:5;

[0074] S2. Manganese sulfate, aerosol OT, ethanol aqueous solution are formed solution B under continuous stirring, and the substance ratio of the ethanol in manganese sulfate, aerosol OT, ethanol aqueous solution is 1 * 10 -3 : 8×10 -4 : 0.12, add solution B dropwise to solution A, mix until clear, continue to stir until the second time clear to form microemulsion C, the concentration of manganese sulfate in solu...

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Abstract

The invention discloses a MnO2 / MnO / Co3O4 / C composite material and a preparation method thereof. The MnO2 / MnO / Co3O4 / C composite material has a core-shell structure, wherein the core is a manganese dioxide material, the shell is a MnO / Co3O4 / C material; the manganese element in the composite material has a mixed valence state, the conductivity of the manganese element is higher than that of a transition metal oxide with only one valence state to a certain extent, the performance is improved, and the manganese element and the transition metal oxide have a synergistic effect. The MnO2 / MnO / Co3O4 / C composite material is prepared by a one-step method, and the operation is simple and convenient; meanwhile, the negative influence of high temperature on the morphology and the performance of the composite material is avoided; the carbon source can increase the overall conductivity and stability of the composite material and ensure that only part of manganese dioxide is reduced in the reaction; thecobalt salt is also added into the composite material, so that the electrical advantages of the cobalt salt can be exerted to improve the comprehensive performance of the whole composite material.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, and more specifically relates to a manganese dioxide / manganese oxide / cobalt tetroxide / carbon composite material and a preparation method thereof. Background technique [0002] Manganese oxide is an important inorganic functional material with great application potential in the fields of energy, catalysis, electronics, electrochemistry, magnetism, ceramics, etc. It has a high specific surface area, strong adsorption performance, and good oxidation resistance. Reducing ability, better electrochemical performance, low cost, non-toxic and other advantages. Manganese has a variety of valence states, and manganese oxides in different valence states have different morphological structures, which will affect the properties of manganese oxides. In composite materials, due to the existence of multi-valence states of manganese element, the atomic arrangement of manganese oxides is various, ...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01G51/04C01B32/05
CPCC01B32/05C01G45/02C01G51/04C01P2002/72C01P2002/85C01P2004/03C01P2004/32C01P2004/61C01P2004/80C01P2006/12
Inventor 徐旭耀陈芳范旭良刘光泳孔令利黄丽娟胡忆蓉欧俊文袁斌斌黄韵娜
Owner LINGNAN NORMAL UNIV
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