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Solvothermal method for preparing nitrogen-doped graphene-gold nanoparticle composite through single step

A gold nanoparticle and nitrogen-doped graphene technology, applied in nanotechnology and other directions, can solve the problems of highly toxic chemical reagents, difficult preparation and high cost, and achieve the effect of simple and easy preparation method, low risk and low cost.

Inactive Publication Date: 2016-06-15
HUAIYIN TEACHERS COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of using highly toxic and dangerous chemical reagents in the current preparation method of nitrogen-doped graphene-Au nanocomposites, the preparation is difficult, costly, and time-consuming, the purpose of the present invention is to propose a low-cost, large-scale A new method for producing nitrogen-doped graphene-Au nanocomposites. This method is simple and easy, and can effectively control the size of Au nanoparticles. The products prepared by this method can be widely used in catalysis, biosensing, biological Analysis and other fields

Method used

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  • Solvothermal method for preparing nitrogen-doped graphene-gold nanoparticle composite through single step
  • Solvothermal method for preparing nitrogen-doped graphene-gold nanoparticle composite through single step
  • Solvothermal method for preparing nitrogen-doped graphene-gold nanoparticle composite through single step

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Embodiment 1

[0026] Embodiment 1: Prepare nitrogen-doped graphene-gold nanoparticle composite material according to the following steps

[0027] 1) Preparation of chloroauric acid aqueous solution with a mass concentration of raw materials of 1%: dissolve 1g of chloroauric acid in water, dilute to 100mL, and store the prepared solution in a refrigerator at low temperature and away from light;

[0028] 2) Preparation of raw material graphene oxide: analysis of pure natural flake graphite powder pre-oxidized and oxidized by Hummers' method (see: Kovtyukhova, N.I.; Ollivier, P.J.; Martin, B.R.; Mallouk, T.E.; Chizhik, S.A.; Buzaneva, E.V.; ​​Gorchinskiy, A.D. Layer-by-Layer Assembly of Ultrathin Composite Films from Micron-Sized Graphite Oxide Sheets and Polycations. Chem. Mater. 1999 , 11,771~778;), filtered and washed, the remaining viscous solid was put into a dialysis bag, dialyzed until the pH value was close to neutral, and the obtained product was dried to be graphene oxide;

[00...

Embodiment 2

[0030] Example 2: The preparation method of this example is the same as that of Example 1, wherein the mass ratio of the oxidized graphite in step 3 is adjusted to 5:1, 2:1, and 1:1. Under the same conditions, a black product—nitrogen-doped Graphene-Au nanoparticle composites.

Embodiment 3

[0031] Example 3: The preparation method of this example is the same as that of Example 1, in which the reaction temperature in step 3 is adjusted to 120°C, 140°C, 160°C, 180°C, and 200°C respectively. Under the same conditions, a black product—nitrogen-doped Graphene-Au nanoparticle composites.

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Abstract

The invention relates to a solvothermal method for preparing a nitrogen-doped graphene-gold nanoparticle composite through a single step. Graphite oxide, urea and chloroauric acid serve as raw materials and are subjected to ultrasonic dispersion and mixing and reacted for a certain period of time in a reaction still under the high-temperature and high-pressure condition, so that reduction of graphene oxide, doping of nitrogen atoms and deposition of the gold nanoparticles on the surface of the graphene are achieved at the same time, and the nitrogen-doped graphene-gold nanoparticle composite is obtained. According to the solvothermal method, the nitrogen doping content, the charging capacity of the gold nanoparticles, and the dimension of the gold nanoparticles are controlled by adjusting the raw material proportion, the pH value of a mixed solution, and the temperature and time of a solvothermal reaction, the method is simple and feasible, no catalyst or additional reducing agent is needed, the reaction process is easy to control, no special requirement for equipment is needed, the cost is low, and application and popularization are easy.

Description

technical field [0001] The invention relates to a solvothermal method for preparing nitrogen-doped graphene-gold (Au) nanoparticle composite materials in one step, in particular to a solvothermal method using graphite oxide, urea and chloroauric acid solution as raw materials, using ethylene glycol The reduction property realizes the reduction of graphene oxide, nitrogen atom doping and gold nanoparticle deposition at the same time, and a simple and fast new method for preparing nitrogen-doped graphene-gold nanoparticle composite materials belongs to the field of material synthesis chemistry. Background technique [0002] As a new type of carbon material, graphene has a unique two-dimensional planar structure and excellent electrical and mechanical properties, and is widely used in physics, chemistry, medicine, materials and other fields. Due to its unique two-dimensional planar structure and large specific surface area, graphene is an ideal carrier for various catalysts, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C01B31/04B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 盛振环魏科霞仲慧徐继明毕丽云范宇晨
Owner HUAIYIN TEACHERS COLLEGE
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