General preparation method of metal oxide nanosheets

An oxide and nanosheet technology, applied in the field of materials, can solve problems such as poor controllability, and achieve the effects of low cost, less product impurities and simple operation

Inactive Publication Date: 2019-07-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made in the synthesis of biomass-based nanomaterials in recent years, due to the poor controllability of the synthesis process of biomass materials, metal oxide nanosheets synthesized from biomass as a structure-directing agent have rarely been reported.

Method used

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  • General preparation method of metal oxide nanosheets
  • General preparation method of metal oxide nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Add 4 grams of glucose and 200 mg of manganese acetate to 10 ml of deionized water, stir well to form a uniform solution;

[0016] (2) Heat the solution obtained in (1) in a tube furnace at 350°C for 20 minutes, then raise the temperature to 400°C at a heating rate of 10°C / min, and keep it at this temperature for 2 hours to obtain manganese oxide nanoparticles piece. Before heating, the tube furnace has been heated to 350°C, and there is no heating step in the solution heating process; the heating is carried out in air. After heating, the samples were cooled naturally in air.

Embodiment 2

[0018] (1) Add 3 grams of glucose and 200 mg of iron acetate to 10 ml of deionized water, and stir thoroughly to form a uniform solution;

[0019] (2) Heat the solution obtained in (1) in a tube furnace at 350°C for 20 minutes, then raise the temperature to 500°C at a heating rate of 10°C / min, and keep it at this temperature for 2 hours to obtain iron oxide nanoparticles piece. Before heating, the tube furnace has been heated up to 350 o C, There is no heating step in the solution heating process; the heating is carried out in air. After heating, the samples were cooled naturally in air.

Embodiment 3

[0021] (1) Add 3.5 grams of glucose and 200 mg of cobalt acetate to 10 ml of deionized water and stir thoroughly to form a uniform solution;

[0022] (2) Heat the solution obtained in (1) in a tube furnace at 350°C for 20 minutes, and then heat it with 10 o The temperature was raised to 400° C. at a heating rate of C / min, and kept at this temperature for 2 hours to obtain cobalt oxide nanosheets. Before heating, the tube furnace has been heated to 350°C, and there is no heating step in the solution heating process; the heating is carried out in air. After heating, the samples were cooled naturally in air.

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Abstract

The invention provides a general preparation method of metal oxide nanosheets. The method uses a conventional inorganic salt as a raw material and regulates a growth process by glucose to synthesize the metal oxide nanosheets; and the method specifically comprises the following steps: dissolving the inorganic salt and the glucose into water according to a certain ratio to form a uniform solution;and performing two-step heating reactions on the obtained solution in a preheated tube furnace or muffle furnace to form the metal oxide nanosheets. Compared with a traditional preparation method of metal oxide nanosheets, the method provided by the invention does not require a templating agent, has mild reaction conditions, and is suitable for industrial production; the raw material is cheap andrenewable, the reaction conditions are mild, high-pressure reaction is not required, and the method has no pollution to the environment; the obtained metal oxide nanosheets are formed by connecting metal oxide nanodots having a size of 20 nm or less through a shared grain boundary manner, and have the characteristics of a thin layer and a large size; and the metal oxide nanosheets prepared by themethod can be applied to the fields of electrochemical energy storage, photocatalysis, optoelectronic devices and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a general preparation method of metal oxide nanosheets. Background technique [0002] Since graphene was successfully prepared, metal oxide nanosheet materials have attracted extensive attention. The unique structural advantages endow metal oxide nanosheets with excellent comprehensive properties, and have broad application prospects in the fields of energy storage and conversion, biomedicine, catalysis, and optoelectronic materials. At present, the preparation methods of metal oxide nanosheets are mainly divided into two categories: top-down method and bottom-up method. The top-down method uses bulk metal oxides as precursors to obtain metal oxide nanosheets by chemical intercalation-exfoliation. The bottom-up method uses small molecules as precursors to obtain metal oxide nanosheets through physical and chemical treatments such as hydrothermal, solvothermal, mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02C01G49/06C01G51/04C01G53/04C01G9/02C01G3/02
CPCC01G3/02C01G9/02C01G45/02C01G49/06C01G51/04C01G53/04C01P2004/03C01P2004/04C01P2004/20
Inventor 卢红斌张佳佳刘沛莹
Owner FUDAN UNIV
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