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Preparation method and application of carbon sphere/Au nanometer composite material

A technology of nanocomposite materials and carbon spheres, which is applied in the field of preparation of nanocomposite materials, can solve the problems affecting the catalytic performance and service life of materials, and achieve the effects of superior catalytic performance, uniform loading, and simple reaction operation

Active Publication Date: 2017-05-24
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the other hand, these stabilizers such as surfactants, polymers, etc. will reduce the accessible surface of metal atoms, thus affecting the catalytic performance and service life of the material

Method used

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  • Preparation method and application of carbon sphere/Au nanometer composite material
  • Preparation method and application of carbon sphere/Au nanometer composite material
  • Preparation method and application of carbon sphere/Au nanometer composite material

Examples

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Embodiment 1

[0035] A method for preparing a carbon sphere / Au nanocomposite material, comprising a preparation process of carbon spheres, a modification process of carbon spheres, and a loading process of Au nanoparticles. The specific steps of the preparation method are as follows:

[0036] a. Weigh 0.05g of cetyltrimethylammonium bromide (CTAB) and dissolve it in 20mL of distilled water, add 2g of glucose during magnetic stirring, stop stirring after it is completely dissolved, and pour the above solution into 25mL of distilled water Put it in a reaction kettle, put it in an oven, heat up to 170°C, react for 12 hours, cool to room temperature, centrifuge to obtain a precipitate, wash it several times with deionized water and absolute ethanol, and dry it in a vacuum oven at 60°C to constant weight , to get carbon spheres;

[0037] b. Weigh 15 mg of carbon spheres prepared in step a and dissolve in 30 mL of distilled water, add 1.7532 g of NaCl and 1 mL of polydiallyldimethylammonium chlor...

Embodiment 2

[0045] A method for preparing a carbon sphere / Au nanocomposite material, comprising a preparation process of carbon spheres, a modification process of carbon spheres, and a loading process of Au nanoparticles. The specific steps of the preparation method are as follows:

[0046] a. Weigh 0.05g of cetyltrimethylammonium bromide (CTAB) and dissolve it in 20mL of distilled water, add 2g of glucose during magnetic stirring, stop stirring after it is completely dissolved, and pour the above solution into 25mL of distilled water Put it in a reaction kettle, put it in an oven, heat up to 170°C, react for 12 hours, cool to room temperature, centrifuge to obtain a precipitate, wash it several times with deionized water and absolute ethanol, and dry it in a vacuum oven at 60°C to constant weight , to get carbon spheres;

[0047] b. Weigh 15 mg of carbon spheres prepared in step a and dissolve in 30 mL of distilled water, add 1.7532 g of NaCl and 0.5 mL of polydiallyldimethylammonium chl...

Embodiment 3

[0052] A method for preparing a carbon sphere / Au nanocomposite material, comprising a preparation process of carbon spheres, a modification process of carbon spheres, and a loading process of Au nanoparticles. The specific steps of the preparation method are as follows:

[0053] a. Weigh 0.05g of cetyltrimethylammonium bromide (CTAB) and dissolve it in 20mL of distilled water, add 2g of glucose during magnetic stirring, stop stirring after it is completely dissolved, and pour the above solution into 25mL of distilled water Put it in a reaction kettle, put it in an oven, heat up to 170°C, react for 12 hours, cool to room temperature, centrifuge to obtain a precipitate, wash it several times with deionized water and absolute ethanol, and dry it in a vacuum oven at 60°C to constant weight , to get carbon spheres;

[0054] b. Weigh 15 mg of carbon spheres prepared in step a and dissolve them in 30 mL of distilled water, add 1.7532 g of NaCl and 1.5 mL of polydiallyldimethylammoniu...

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Abstract

The invention discloses a preparation method and application of a carbon sphere / Au (copper) nanometer composite material. The preparation method comprises the following steps of firstly, preparing a carbon sphere, modifying the surface of the carbon sphere by PDDA (poly diallyldimethylammonium chloride), enabling the surface of the carbon sphere to carry positive charges, and utilizing electrostatic attraction to uniformly and quickly adsorb AuC14<-> onto the surface of the carbon sphere in the heating and stirring process with an H2O and DMF mixed solvent; finally, under the protection action of PVP (polyvinylpyrrolidone), using N,N-DMF (N,N-dimethylformamide) as a reduction agent, enabling Au to grow along a particular crystal face, and further reducing in situ in one step, so as to obtain the uniformly loaded carbon sphere / Au nanometer composite material. Compared with the prior art, the preparation method has the advantages that a gold nanoparticle is loaded by using the green, low-price and easily-synthetic carbon sphere as a substrate, the reaction time is short, the operation is simple and convenient, and the repeatability is high; by changing the adding amount of HAuC14, the carbon sphere / Au nanometer composite material with controllable loading amount is obtained; the carbon sphere / Au nanometer composite material has catalyzing property, and especially has excellent catalyzing property on the reduction of 4-nitrophenol.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material, in particular to a preparation method of a carbon sphere / Au nanocomposite material and its application. Background technique [0002] Noble metal nanomaterials have the advantages of size-dependent electronic structure, surface characteristics, controllable composition, good conductivity, and can be easily synthesized and processed in liquid phase, which makes them attract researchers in the field of catalysis and biosensors based on catalysis. widespread attention. However, the high cost of noble metals hinders their practical applications due to the high demand for catalysts. When the amount of noble metal is constant, the smaller the size of noble metal nanoparticles, the larger the electrochemically active surface area and more accessible metal surfaces. Therefore, it is necessary to reduce the average size of noble metal nanoparticles as much as possible. However, when t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C07C209/36C07C211/51
CPCB01J31/069B01J37/16B01J2231/64C07C209/36C07C211/51
Inventor 张莉胡青青刘畅
Owner ANHUI NORMAL UNIV
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