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Preparation method of metal and metal oxide quantum dot-mesopore carbon nanometer composite material

A technology of nanocomposite materials and quantum dots, which is applied in the field of preparation of metal and metal oxide quantum dots-mesoporous carbon nanocomposites, can solve the problems of toxicity, cost, and human hazards, and achieve the prevention of agglomeration, convenient operation, The effect of stable performance

Inactive Publication Date: 2017-05-31
宁海县浙工大海洋研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous reports, there are few reports on metal and metal oxide quantum dots / mesoporous carbon composites used in energy storage and catalysis, and most of the preparation methods require some expensive, toxic raw materials and reagents and special devices. , more harmful to the human body

Method used

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  • Preparation method of metal and metal oxide quantum dot-mesopore carbon nanometer composite material
  • Preparation method of metal and metal oxide quantum dot-mesopore carbon nanometer composite material
  • Preparation method of metal and metal oxide quantum dot-mesopore carbon nanometer composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Peel the corn stalks and remove the inner stems, take the inner pulp and pulverize, dry at 60°C for 5 hours, and set aside. Weigh 0.49g of manganese acetate, add 35mL of distilled water and 5mL of ethanol to prepare a 50mmol / L manganese acetate solution. Weigh 0.2 g of the treated corn husks into a 100 mL round bottom flask, add the prepared manganese acetate solution, ultrasonicate for 30 min at room temperature, and vacuum treat for 30 min. Suction filtration once and dry at 80°C. The impregnated and dried corn husks were placed in a tube furnace under an argon atmosphere and roasted for 4 hours at a roasting temperature of 600°C and a heating rate of 5°C / min. Grind the product after cooling.

[0038] The obtained manganous oxide quantum dots-mesoporous carbon nanocomposite material was carried out transmission electron microscope detection, the result is as follows figure 1 As shown, the results show that: the quantum dots are highly uniformly dispersed on the mes...

Embodiment 2

[0040] Peel the corn stalks and remove the inner stems, take the inner pulp and pulverize, dry at 60°C for 5 hours, and set aside. Weigh 0.498g of cobalt acetate, add 35mL of distilled water and 5mL of ethanol to prepare a 50mmol / L cobalt acetate solution. Weigh 0.2 g of the treated corn husks into a 100 mL round bottom flask, add the prepared cobalt acetate solution, ultrasonicate for 30 min at room temperature, and vacuum treat for 30 min. Suction filtration once and dry at 80°C. The impregnated and dried corn husks were placed in a tube furnace under an argon atmosphere and roasted for 4 hours at a roasting temperature of 600°C and a heating rate of 5°C / min. Grind the product after cooling.

[0041] The obtained cobalt oxide quantum dot-mesoporous carbon nanocomposite material is carried out transmission electron microscope detection, the result is as follows figure 2 As shown, the results show that: the quantum dots are highly uniformly dispersed on the mesoporous carb...

Embodiment 3

[0043] Peel the corn stalks and remove the inner stems, take the inner pulp and pulverize, dry at 60°C for 5 hours, and set aside. Weigh 0.799g of copper acetate, add 35mL of distilled water and 5mL of ethanol to prepare a 100mmol / L copper acetate solution. Weigh 0.2g of the treated corn husks into a 100mL round bottom flask, add the prepared copper acetate solution, ultrasonicate for 30min at room temperature, and vacuum for 30min. Suction filtration once and dry at 80°C. The impregnated and dried corn husks were placed in a tube furnace under an argon atmosphere and roasted for 4 hours at a roasting temperature of 600°C and a heating rate of 5°C / min. Grind the product after cooling.

[0044] The obtained copper quantum dot-mesoporous carbon nanocomposite material is carried out transmission electron microscope detection, the result is as follows image 3 As shown, the results show that: the quantum dots are highly uniformly dispersed on the mesoporous carbon, and the part...

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Abstract

The invention aims to provide a preparation method of a metal and metal oxide quantum dot-mesopore carbon nanometer composite material with excellent capacity and cycle properties. The method comprises the steps of preparing an impregnation liquid by taking a metal M salt as a solute and absolute ethyl alcohol and distilled water as a solvent; taking plant with high loose characteristic as a carbon source; immersing straw particles in the impregnation liquid; and performing drying, roasting and grinding to prepare the composite material. The method is simple in process and low in cost, the grain sizes of quantum dots are about 2-10 nanometers, the quantum dots are uniformly distributed, and high reproducibility is achieved; and the prepared metal and metal oxide quantum dot / mesopore carbon nanometer composite material shows excellent capacity and cycle property when used for a supercapacitor electrode material and also shows favorable catalytic performance when used for catalytic oxidation of methanol.

Description

[0001] (1) Technical field [0002] The invention relates to a method for preparing a metal and metal oxide quantum dot-mesoporous carbon nanocomposite material. [0003] (2) Background technology [0004] Quantum dots (quantum dots, QDs), also known as semiconductor nanocrystals, are composed of hundreds to thousands of atoms, with a radius smaller than or close to the Bohr exciton radius, and a size smaller than zero-dimensional nano-metal or semiconductor materials. Due to its unique structure, quantum dots have basic characteristics such as quantum size effect, surface effect, macroscopic quantum tunneling effect, dielectric confinement effect, quantum confinement effect, and surface effect. Therefore, compared with macroscopic materials, quantum dot nanomaterials exhibit many special physical and chemical properties, and present broad application prospects in the fields of optics, energy storage, catalysis, and new materials. [0005] Supercapacitor is an electrochemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/46H01G11/36H01G11/30C01B32/05C01B32/949C01G45/02B22F9/20B82Y30/00
CPCY02E60/13H01G11/32B22F9/20B82Y30/00C01G45/02C01P2002/72C01P2004/04C01P2004/80H01G11/30H01G11/36H01G11/46
Inventor 王连邦苏利伟黑金培
Owner 宁海县浙工大海洋研究院
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