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Preparation method of gold-graphene composite nano material

A graphene composite and nano-material technology, applied in the field of nano-materials, can solve the problems of no 2D peak, easy to fall off, easy to deform, etc., and achieve the effects of enhanced stability, strong controllability, and low cost

Active Publication Date: 2014-04-30
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current method used to prepare AuC nanomaterials is the hydrothermal method. The disadvantage is that the synthesized gold nanoparticles are not wrapped with graphene but amorphous carbon, so they are easy to deform and have no 2D peaks.
Another method is to use electrostatic interaction. Although the gold nanoparticles are wrapped with graphene in this method, it is unstable and easy to fall off when the external conditions change.

Method used

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  • Preparation method of gold-graphene composite nano material
  • Preparation method of gold-graphene composite nano material
  • Preparation method of gold-graphene composite nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The preparation method of gold graphene composite nanomaterial comprises the steps:

[0017] (1) Mix 29 mL of HAuCl with a concentration of 10 mg / mL 4 The solution was added into 80mL methanol and ultrasonically treated for 1-2h to obtain solution A; 1g SiO 2 Add another 80mL of methanol to ultrasonic treatment for 1-2h to obtain solution B; mix solution A and solution B and then conduct ultrasonic treatment for 1-2h to remove methanol, and dry the obtained mixture at 75-85°C; The ultrasonic treatment mentioned in (1) refers to the ultrasonic treatment under the condition of 180w;

[0018] (2) Grind the mixture obtained in step (1) into powder in CH 4 The flow rate is 150cm 2 Ignite for 8-12min under the airflow condition of / mL, the burning temperature is 800-1000℃, mix with the mixed solution of HF, ethanol and water after cooling, centrifuge at 1000rpm for 3min, and obtain gold graphene after separating the centrifugal liquid Composite nanoparticles, (gold graphe...

Embodiment 2

[0020] The preparation method of gold graphene composite nanomaterial comprises the steps:

[0021] (1) Mix 29 mL of HAuCl with a concentration of 10 mg / mL 4 The solution was added into 80mL methanol and ultrasonically treated for 1-2h to obtain solution A; 1g SiO 2 Add another 80mL of methanol to ultrasonic treatment for 1-2h to obtain solution B; mix solution A and solution B and then conduct ultrasonic treatment for 1-2h to remove methanol, and dry the obtained mixture at 75-85°C; The ultrasonic treatment mentioned in (1) refers to the ultrasonic treatment under the condition of 180w;

[0022] (2) Grind the mixture obtained in step (1) into powder in CH 4 The flow rate is 180cm 2 Ignite for 8-12min under the airflow condition of / mL, the burning temperature is 800-1000℃, mix with the mixed solution of HF, ethanol and water after cooling, centrifuge at 1000rpm for 3min, and obtain gold graphene after separating the centrifugal liquid Composite nanoparticles (obtained by ...

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Abstract

The invention discloses a preparation method of a gold-graphene composite nano material. The preparation method is environment-friendly, efficient, simple, convenient and feasible, and the prepared gold-carbon composite material has a good application prospect in the fields of two-photon fluorescence, Raman enhancement, near-infrared absorption and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of a gold-graphene composite nanomaterial. Background technique [0002] Nanomaterials have attracted widespread attention due to their potential biomedical applications. Surface-enhanced Raman scattering (SERS) is mainly an abnormal optical enhancement phenomenon of nanoscale rough surfaces or particle systems, which can amplify the Raman signal of molecules adsorbed on the surface by about 10 6 ~10 14 times, so it has a strong advantage in high-sensitivity detection. The preparation of SERS substrates with stable, uniform distribution, definite size and ordered nanostructure surfaces will not only contribute to the theoretical research of SERS to some extent, but also be suitable for quantitative or semi-quantitative analysis due to the high reproducibility of the surface. thus arousing widespread attention. Gold-graphene composite nan...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00C01B32/184
Inventor 陈卓边霞谭蔚泓
Owner HUNAN UNIV
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