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Preparation method of defect-rich metal oxide (sulfide)/graphene oxide composite material

A composite material and defect-rich technology, applied in the field of preparation of defect-rich metal oxide/graphene oxide composite materials, can solve the problems of harsh production conditions, high production cost, unreported semiconductor materials and the like

Inactive Publication Date: 2019-09-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing methods for controlling the defects of oxides and sulfides are mainly to reduce them under high temperature conditions, and the production conditions are relatively harsh and the production cost is high.
In addition, the method for the assisted preparation of semiconductor materials with a large number of surface defects by graphene oxide has not been reported

Method used

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  • Preparation method of defect-rich metal oxide (sulfide)/graphene oxide composite material
  • Preparation method of defect-rich metal oxide (sulfide)/graphene oxide composite material
  • Preparation method of defect-rich metal oxide (sulfide)/graphene oxide composite material

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Effect test

Embodiment 1

[0021] Preparation of lithium-reduced GO@MoS proposed by the present invention 2 The material can be implemented by the following methods, and the specific preparation method includes the following steps:

[0022] (1) 100~600mg dry MoS 2 Pour the nanoparticles into a beaker, add 20-40ml EDA and 1-3mL graphene oxide gel, and add magnetons.

[0023] (2) 12-36mg lithium metal foil is dissolved in the above solution, sealed and magnetically stirred.

[0024] (3) After fully reacting, gradually add hydrochloric acid dropwise and stir to extinguish excess lithium flakes and form lithium salt to remove residual lithium metal.

[0025] (4) The precipitate obtained after the reaction was washed with deionized water and absolute ethanol, and then freeze-dried.

Embodiment 2

[0027] The preparation of the lithium-reduced GO@ZnO material proposed by the present invention can be implemented by the following method, and the specific preparation method includes the following steps:

[0028] (1) Pour 100-600mg of dry ZnO nanoparticles into a beaker, add 20-40ml of EDA and 1-3mL of graphene oxide gel, and add magnetons.

[0029] (2) 12-36mg lithium metal foil is dissolved in the above solution, sealed and magnetically stirred.

[0030] (3) After fully reacting, gradually add hydrochloric acid dropwise and stir to extinguish excess lithium flakes and form lithium salt to remove residual lithium metal.

[0031] (4) The precipitate obtained after the reaction was washed with deionized water and absolute ethanol, and then freeze-dried.

Embodiment 3

[0033] Preparation of lithium-reduced GO@MoO proposed by the present invention 3 The material can be implemented by the following methods, and the specific preparation method includes the following steps:

[0034] (1) 100~600mg dry MoO 3 Pour the nanoparticles into a beaker, add 20-40ml EDA and 1-3mL graphene oxide gel, and add magnetons.

[0035] (2) 12-36mg lithium metal foil is dissolved in the above solution, sealed and magnetically stirred.

[0036] (3) After fully reacting, hydrochloric acid was gradually added dropwise and stirred to extinguish excess lithium flakes and form lithium salt to remove residual lithium metal.

[0037] (4) The precipitate obtained after the reaction was washed with deionized water and absolute ethanol, and then freeze-dried.

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Abstract

The invention provides a preparation method of a defect-rich metal oxide (sulfide) / graphene oxide composite material. A metallic lithium sheet, a graphene oxide sol and a selected oxide or sulfide are uniformly stirred in a liquid phase, and the obtained mixture is washed and dried to obtain the composite material having a certain defect concentration. The stirring step of the method is carried out in an anoxic and anhydrous environment, and excess hydrochloric acid is added after a sufficient reaction in order to remove the remaining lithium sheet. The material prepared in the invention has a large number of surface defects, so photochemical and electrochemical reactions can be easily promoted; and compounding of metal oxide (sulfide) with the graphene oxide can greatly expand the light absorption range, increase the specific surface area and improve the conductivity, so the photochemical and electrochemical properties of the oxide (sulfide) material are improved. The method is carried out at room temperature, has the advantages of simplicity in operation, and low cost, and provides a new idea for the preparation of photocatalysts and energy storage materials.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a defect-rich metal oxide (sulfur) compound / graphene oxide composite material. Background technique [0002] Environmental and energy issues have attracted worldwide attention, and it is imminent to seek the development of new clean energy and energy storage technologies. Semiconductor materials are widely used in it, especially many transition metal oxides and their sulfides, such as titanium dioxide (TiO 2 ), molybdenum sulfide (MoS 2 ), zinc oxide (ZnO) and molybdenum trioxide (MoO 3 ), etc., they are semiconductor materials that have been widely studied in recent years. They all have the characteristics of stable chemical properties, low price, abundant sources, and relatively simple preparation. They are excellent optoelectronic materials. However, the wide bandgap limits the carrier transport and separation capabilities of these materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J23/28B01J27/051
CPCB01J27/051B01J23/06B01J23/28B01J35/39
Inventor 李美成彭鹏陈杰威牛凯李静如刘乐浩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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