Preparation method of Bi2Fe4O9 material and application thereof

A technology of surfactants and precursors, applied in chemical instruments and methods, inorganic chemistry, hybrid capacitor electrodes, etc., can solve the problems of bismuth-iron compounds' catalytic and gas-sensing performance limitations, high sintering temperature, small specific surface area, etc., to achieve Excellent electrochemical performance, more voids, and high-quality specific capacitance effects

Pending Publication Date: 2022-02-25
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high sintering temperature of the solid-state reaction method and the sol-gel method, the particles are easily agglomerated, and the specific surface area is small, the catalytic and gas-sensing properties of the bismuth-iron compounds prepared by these two methods are greatly limited.

Method used

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  • Preparation method of Bi2Fe4O9 material and application thereof
  • Preparation method of Bi2Fe4O9 material and application thereof
  • Preparation method of Bi2Fe4O9 material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Take 1-2ml of concentrated nitric acid and deionized water and mix and dilute according to the volume ratio of 1:9 to obtain dilute nitric acid. Weigh 0.49g of bismuth nitrate pentahydrate and 0.41g of ferric nitrate nonahydrate and dissolve them in the prepared dilute nitric acid. , stirred for 2 hours until completely dissolved to obtain a yellow solution, added 0.3 g of polyvinylpyrrolidone with a molecular weight of 1,300,000, and continued to stir for 4 hours to obtain a transparent and clear yellow mixed solution. Add 6mol / L sodium hydroxide solution dropwise to the mixed solution, and a reddish-brown precipitate appears; continue to add the sodium hydroxide solution dropwise until the pH value of the suspension is 12, accelerate magnetic stirring, and after stirring vigorously for 3 hours, place Pour the suspension into a clean polytetrafluoroethylene reactor lining, tighten the reactor, put it into a blast drying oven at 160°C for 15 hours, and then cool natu...

Embodiment 2

[0034] On the basis of Example 1, the difference of Example 1 is that 3 mol / L sodium hydroxide solution is added dropwise to the mixed solution.

Embodiment 3

[0036] On the basis of Example 1, the difference of Example 1 is that 8 mol / L sodium hydroxide solution is added dropwise to the mixed solution.

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Abstract

The invention discloses a preparation method of a Bi2Fe4O9 material and an application thereof, and the method comprises the following steps: (1) adding bismuth salt, ferric salt and a surfactant into acid for dissolving, and titrating with an alkaline solution to obtain a precursor suspension; (2) carrying out a hydrothermal reaction on the precursor suspension; and (3) centrifuging, washing and drying the solution obtained by the reaction in the step (2) to obtain the Bi2Fe4O9 material. The Bi2Fe4O9 material obtained by the method is applied to a supercapacitor electrode and shows relatively high mass specific capacitance and relatively good electrochemical performance; by controlling the concentration of sodium hydroxide and the use amount of polyvinylpyrrolidone, a flower-shaped and strip-shaped Bi2Fe4O9 interlaced and nested structure can be obtained, and the special structure and more gaps provide a convenient conductive channel for charge transfer, so that the Bi2Fe4O9 material has the advantages of high specific capacity, stable charge and discharge and the like.

Description

technical field [0001] The present invention relates to a kind of preparation method and application of multiferroic nanometer material, relate in particular to a kind of Bi 2 Fe 4 o 9 Preparation methods and applications of materials. Background technique [0002] With the rapid development of economy, energy depletion and environmental pollution have become urgent problems to be solved. The development of new clean energy is an effective way to solve energy depletion and an important research direction in the field of new energy. Supercapacitor is a new type of non-polluting energy storage device, which has insurmountable advantages of other batteries in terms of efficiency, fast charging characteristics, power density, and service life. Since the performance of a supercapacitor is between that of a battery and an electrolytic capacitor, it has a higher energy density than a traditional capacitor and a lower energy density than a battery. Therefore, finding suitable e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00H01G11/24H01G11/46
CPCC01G49/00H01G11/46H01G11/24C01P2004/03C01P2002/72C01P2006/40Y02E60/13
Inventor 张亚梅张展程冰洁许红祥褚艳秋韩汝取李洪波张文钊
Owner JIANGSU UNIV OF SCI & TECH
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