Method for electrochemically preparing manganese dioxide-graphene compound

A manganese dioxide, electrochemical technology, applied in the field of controllable preparation of graphene-based composite materials, can solve the problems of increased production costs, large environmental hazards, high equipment requirements, etc., to achieve low cost, avoid high toxicity, and high product quality Effect

Pending Publication Date: 2021-01-15
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing methods for preparing manganese dioxide-graphene composites require high temperature, high equipment requirements, complex processes, and increased production costs.
Moreover, the use of flammable, explosive and strong oxidizing substances in the production and preparation process has poor controllability and is harmful to the environment

Method used

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  • Method for electrochemically preparing manganese dioxide-graphene compound
  • Method for electrochemically preparing manganese dioxide-graphene compound
  • Method for electrochemically preparing manganese dioxide-graphene compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Please refer to figure 1 and figure 2 , figure 1 It is the XRD figure of electrochemically preparing manganese dioxide-graphene composite in the embodiment of the present invention, figure 2 It is an optical microscope image of the electrochemically prepared manganese dioxide-graphene composite in Example 1 of the present invention.

[0055] In this embodiment, 0.1 mol / L ammonium sulfate was used, dissolved in 300 mL of deionized water, and then 0.1 mol / L potassium permanganate was added to stir and dissolve to form an electrolyte.

[0056] Then put a graphite foil electrode with a length of 5 cm, a width of 6 cm, and a thickness of 0.2 mm into the electrolyte, and connect it to a 10V AC power supply. The positive and negative poles of the power supply are changed every 30 seconds. Hour.

[0057] Then use absolute ethanol and deionized water to carry out multiple re-washing, for example, wash 3 times.

[0058] Finally, dry in a vacuum oven at 60°C.

[0059] Util...

Embodiment 2

[0061] Please refer to image 3 and Figure 4 , figure 2 The XRD pattern of manganese dioxide-graphene composite electrochemically prepared for the embodiment of the present invention, Figure 6 The optical microscope image of the manganese dioxide-graphene composite electrochemically prepared for the embodiment of the present invention.

[0062] In this embodiment, 0.1 mol / L ammonium oxalate was used, dissolved in 300 mL of deionized water, and then 0.1 mol / L potassium manganate was added to stir and dissolve to form an electrolyte.

[0063] Then put a graphite foil electrode with a length of 5 cm, a width of 6 cm, and a thickness of 0.2 mm into the electrolyte, and connect it to a 10V AC power supply. The positive and negative poles of the power supply are changed every 30 seconds. Hour.

[0064] Then use absolute ethanol and deionized water to carry out multiple re-washing, for example, wash 3 times.

[0065] Finally, dry in a vacuum oven at 60°C.

[0066] Utilize th...

Embodiment 3

[0068] Please refer to Figure 5 and Figure 6 , Figure 5 It is the XRD pattern of electrochemically preparing manganese dioxide-graphene composite in the embodiment of the present invention three, Figure 6 It is an optical microscope image of the electrochemically prepared manganese dioxide-graphene composite in Example 3 of the present invention.

[0069] In this embodiment, 0.1 mol / L sodium chloride was used, dissolved in 300 mL of deionized water, and then 0.1 mol / L potassium permanganate was added to stir and dissolve to form an electrolyte.

[0070] Then put a graphite foil electrode with a length of 5 cm, a width of 6 cm, and a thickness of 0.2 mm into the electrolyte, and connect it to a 10V AC power supply. The positive and negative poles of the power supply are changed every 30 seconds. Hour.

[0071] Then use absolute ethanol and deionized water to carry out multiple re-washing, for example, wash 3 times.

[0072] Finally, dry in a vacuum oven at 60°C.

[00...

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Abstract

The invention provides a method for electrochemically preparing a manganese dioxide-graphene compound, and belongs to the technical field of controllable preparation of inorganic nano materials. Soluble salt containing ammonium, sulfate, peroxysulphate or halogen anions and soluble salt containing permanganate or manganate are used as electrolyte, graphite foils or graphite rods are used as electrodes, and the manganese dioxide-graphene compound is prepared in one step by adopting an electrochemical method. As two graphite foils are respectively used as the anode and the cathode, the use of noble metal electrodes is reduced, and the cost is effectively reduced. The method disclosed by the invention is simple and can be implemented in a general beaker or glassware. The preparation method isgreen, environment-friendly, simple in equipment, short in operation time, convenient to operate, simple in process and easy to amplify.

Description

technical field [0001] The invention relates to the technical field of controllable preparation of graphene-based composite materials, in particular to a method for electrochemically preparing manganese dioxide-graphene composites. Background technique [0002] The design and development of graphene-semiconductor composite materials has attracted widespread attention because of its potential applications in catalysts, adsorbents, chemical sensors, flexible devices, biological fields, battery electrodes, and other fields. Among them, the composite research of graphene with titanium dioxide and manganese dioxide is the most researched, so new catalytic, electronic and optical properties are produced after the composite. Compared with titanium oxide, manganese dioxide is more widely used. [0003] The existing preparation methods of manganese dioxide-graphene composites mainly use graphene oxide (GO) as the composite material, because the surface of GO is rich in a large numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02C01B32/19
CPCC01G45/02C01B32/19C01P2004/80C01P2002/72C01P2004/02
Inventor 李乐张丹
Owner SHAANXI SCI TECH UNIV
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