Method for electro-chemical compounding of graphene and metallic oxide

A composite graphene and oxide technology, which is applied in the direction of electrolytic inorganic material coating, etc., can solve the problems of low photon efficiency, high photogenerated electron-hole recombination rate, and unremarkable photocatalytic performance, and achieve simple operation, excellent performance, The effect of excellent electron transport performance

Active Publication Date: 2013-07-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Metal oxides are currently the most widely and deeply researched semiconductor photocatalysts, but metal oxides usually have a wide band gap and mainly absorb ultraviolet light in the solar spectrum. Light is extremely unfavorable; in addition, the photogenerated e

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Use natural flake graphite as the anode, platinum sheet as the cathode, and add the electrolyte iron sulfate solution with a concentration of 0.5mol / L and a sulfuric acid concentration of 4mol / L;

[0020] 2) Apply voltage between the anode and cathode at room temperature, keep 0V for 10s, 3V for 5s, 10V for 10s, and operate the voltage cycle for 30min according to the above changes;

[0021] 3) The obtained product is centrifuged, washed, and vacuum-dried to obtain a composite of graphene and metal iron oxide.

[0022] The composite material of graphene and metal iron oxide prepared by the invention has excellent electron transport performance, can be used as a lithium ion battery negative electrode material and a material for photocatalytic degradation of organic pollutants, has excellent performance, is easy to operate, and is suitable for large-scale industrial production.

Embodiment 2

[0024] 1) Use natural flake graphite as the anode, platinum sheet as the cathode, and add electrolytes with a zinc sulfate solution concentration of 0.5mol / L, a copper sulfate solution concentration of 0.2mol / L, and a sulfuric acid concentration of 15mol / L;

[0025] 2) Apply voltage between the anode and cathode at room temperature, keep 0V for 10s, 5V for 5s, 8V for 10s, and operate the voltage cycle for 10min according to the above changes;

[0026] 3) The obtained product is centrifuged, washed, and vacuum-dried to obtain a composite of graphene and metal copper oxide.

[0027] The composite material of graphene, metal zinc oxide and copper oxide prepared by the invention has excellent electron transport performance, can be used as a lithium ion battery negative electrode material and a material for photocatalytic degradation of organic pollutants, has excellent performance, simple operation, and is suitable for large-scale industrial production.

Embodiment 3

[0029] 1) Use expanded graphite graphite as the anode, platinum sheet as the cathode, and add the electrolyte with a concentration of chromium sulfate solution of 1mol / L and a concentration of sulfuric acid of 10mol / L;

[0030] 2) Apply a voltage between the anode and the cathode at room temperature, keep -5V for 10s, keep 10V for 10s, and cycle the voltage for 10min according to the above changes;

[0031] 3) The obtained product is centrifuged, washed, and vacuum-dried to obtain a composite of graphene and metal chromium oxide.

[0032] The composite material of graphene and metal chromium oxide prepared by the invention has excellent electron transport performance, can be used as a lithium ion battery negative electrode material and a material for photocatalytic degradation of organic pollutants, has excellent performance, is easy to operate, and is suitable for large-scale industrial production.

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Abstract

The invention discloses a method for electro-chemical compounding of graphene and metallic oxide. The method comprises the following steps of: (1) adding a graphite flake as a positive electrode and a platinum sheet as a negative electrode into an electrolyte solution; (2) adding variational voltage for 1-60 minutes between the positive electrode and the negative electrode; and (3) centrifuging, washing and carrying out vacuum drying to obtain a compound of the graphene and the metallic oxide. The compound material of the graphene and the metallic oxide, prepared by the method, has excellent electrical transmission performance and excellent performances, can serve as a lithium ion battery cathode material and a photocatalytic-degraded organic pollutant material and is simple to operate and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for electrochemically compounding graphene and metal oxides. Background technique [0002] Composite graphene and metal oxides by electrochemical exfoliation is a new method for compounding graphene and metal oxides. The composite of graphene and metal oxide is a research hotspot in recent years. [0003] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a planar film composed of carbon atoms with sp2 hybrid orbitals forming a hexagonal honeycomb lattice, and a two-dimensional material with a thickness of only one carbon atom. Graphene is currently the thinnest but also the hardest nanomaterial in the world. It is almost completely transparent and only absorbs 2.3% of sunlight; its thermal conductivity is as high as 5300W / m K, which is higher than that of carbon nanotubes and diamonds. The electron mobility exceeds 15000cm / V s, which is higher than that of carbon nanotube...

Claims

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Application Information

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IPC IPC(8): C25D9/06
Inventor 于濂清韩雪郭亮亮王清清董开拓
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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