Manganese ferrite @ carbon nitride composite material as well as preparation method and application thereof

A composite material and carbon nitride technology, applied in the field of materials, can solve the problem of low specific capacitance of carbon materials, and achieve the effects of improving electrochemical performance, excellent cycle stability, and non-toxic and harmless solvents

Active Publication Date: 2020-09-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the carbon-based materials used to prepare supercapacitors mainly include activated carbon, carbon nanotubes, graphene, and carbon nitride, etc., but the low specific capacitance of carbon materials limits their application in the field of supercapacitors.

Method used

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  • Manganese ferrite @ carbon nitride composite material as well as preparation method and application thereof
  • Manganese ferrite @ carbon nitride composite material as well as preparation method and application thereof
  • Manganese ferrite @ carbon nitride composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A MnFe 2 o 4 @Carbon Nitride Composite Material, the shape of the composite material is rod-like, and it is prepared by the following steps:

[0037] In the first step, put 8g CO(NH 2 ) 2 , and then sealed and placed in a tube furnace for high-temperature calcination, the temperature of high-temperature calcination is 400°C, the time of high-temperature calcination is 4h, and the heating rate is 5°C min -1 ;

[0038] In the second step, put the sample prepared in the first step into a beaker, and use concentrated nitric acid and concentrated sulfuric acid to acidify the sample for 1 hour, then wash with deionized water, centrifuge at 10000r / min for 15 minutes, and vacuum dry at 60°C 12h;

[0039] In the third step, the sample processed in the second step is transferred to the autoclave, and then 30 mL of NH with a concentration of 25% by mass is added. 3 ·H 2 O, then carry out hydrothermal reaction, the temperature of hydrothermal reaction in the process is 180 ℃, ...

Embodiment 2

[0043] A MnFe 2 o 4 @Carbon Nitride Composite Material, the shape of the composite material is rod-like, and it is prepared by the following steps:

[0044] In the first step, put 8g CO(NH 2 ) 2 , and then sealed and placed in a tube furnace for high-temperature calcination, the temperature for high-temperature calcination is 600°C, the time for high-temperature calcination is 4 hours, and the heating rate is 5°C min -1 ;

[0045] In the second step, take the sample prepared in the first step and put it into a beaker, use concentrated nitric acid and concentrated sulfuric acid to acidify the sample for 1 hour, then wash with deionized water, centrifuge at 10000r / min for 15 minutes, and vacuum dry at 60°C for 12 hours ;

[0046] In the third step, the sample processed in the second step is transferred to the autoclave, and then 30 mL of NH with a concentration of 25% by mass is added. 3 ·H 2 O, then carry out hydrothermal reaction, the temperature of hydrothermal reactio...

Embodiment 3

[0050] A MnFe 2 o 4 @Carbon Nitride Composite Material, the shape of the composite material is rod-like, and it is prepared by the following steps:

[0051] In the first step, put 8g CO(NH 2 ) 2 , and then sealed and placed in a tube furnace for high-temperature calcination, the temperature of high-temperature calcination is 600°C, the time of high-temperature calcination is 8 hours, and the heating rate is 5°C min -1 ;

[0052] In the second step, take the sample prepared in the first step and put it into a beaker, use concentrated nitric acid and concentrated sulfuric acid to acidify the sample for 1 hour, then wash with deionized water, centrifuge at 10000r / min for 15 minutes, and vacuum dry at 60°C for 12 hours ;

[0053] In the third step, the sample processed in the second step is transferred to the autoclave, and then 30 mL of NH with a concentration of 28% by mass is added. 3 ·H 2 O, then carry out hydrothermal reaction, the temperature of hydrothermal reaction ...

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Abstract

The invention relates to a manganese ferrite @ carbon nitride composite material and a preparation method and application thereof. The preparation method specifically comprises the following steps that S1, a pretreated carbon precursor and ammonia water are subjected to a hydrothermal reaction, then cooling, washing, centrifuging and drying the mixture to obtain C3N4; and S2, mixing an aqueous solution of manganese nitrate, ferric nitrate, ammonium fluoride and urea with the C3N4 prepared in the step S1, then carrying out hydrothermal reaction, and then cooling, washing, centrifuging and drying the mixture to obtain the manganese ferrite @ carbon nitride composite material. The prepared manganese ferrite @ carbon nitride composite material can be used as an electrode material of a supercapacitor. Compared with the prior art, the electrode material prepared by the invention has high specific capacitance and excellent oxidation-reduction capability, can be directly used as an electrode material of a supercapacitor, and is simple in preparation method and nontoxic and harmless in raw materials.

Description

technical field [0001] The invention relates to the field of materials, in particular to a manganese ferrite@carbon nitride composite material and its preparation method and application. Background technique [0002] With high power density, supercapacitors are a new generation of efficient energy storage devices, in which electrode materials are crucial to the development of supercapacitors. At present, the electrode materials used as supercapacitors are mainly divided into: carbon-based electrode materials, transition metal oxide electrode materials and conductive polymer electrode materials. Carbon-based electrode materials have the advantages of simple preparation process, low cost, and easy industrialization. They are important materials for making electrodes with good conductivity, large specific surface area, and good cycle stability, and have good application prospects. At present, the carbon-based materials used to prepare supercapacitors mainly include activated c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C01B21/082H01G11/30H01G11/86B82Y40/00B82Y30/00
CPCC01G49/00C01B21/0605H01G11/30H01G11/86B82Y40/00B82Y30/00C01P2004/80C01P2004/03C01P2006/40C01P2004/16Y02E60/13
Inventor 韩生胡晓敏刘顺昌马健丛海山蒋继波陈宇凯唐佳斌
Owner SHANGHAI INST OF TECH
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