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Preparation method of nitrogen doped graphene supported gold nano particle

A technology of nitrogen-doped graphene and gold nanoparticles, applied in graphene, nano-carbon, etc., can solve problems such as hindering application research, unfavorable recombination, and lack of activated functional groups

Inactive Publication Date: 2017-04-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because graphene has no energy band gap, its electrical conductivity cannot be completely controlled like traditional semiconductors. In addition, the surface of graphene has no activated functional groups, which is not conducive to the recombination with other materials (such as metal particles and organic functional small molecules), thus hinders its application research in wider fields

Method used

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  • Preparation method of nitrogen doped graphene supported gold nano particle
  • Preparation method of nitrogen doped graphene supported gold nano particle
  • Preparation method of nitrogen doped graphene supported gold nano particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of Graphite Oxide and Characterization of Graphite Oxide

[0017] Preparation of graphite oxide: The improved Hummers method is used to prepare graphite oxide dry grinding to obtain graphite oxide powder, and the obtained solid powder is characterized by infrared and XRD respectively, and the obtained data are as follows figure 1 and figure 2 shown.

Embodiment 2

[0019] The prepared graphite oxide, nitrogen-doped graphene, and nitrogen-doped graphene-supported gold nanoparticles were dispersed in secondary water by ultrasonic for 1 h, respectively, and 5 μL of the dispersed liquid was dropped on a copper grid to be dried and then observed in a transmission electron microscope. Morphology and structure, as shown in transmission electron microscope image 3 shown.

Embodiment 3

[0021] Nitrogen-doped graphene, nitrogen-doped graphene-supported gold nanoparticle composite nanomaterials were made into samples, and their element states and element contents were measured under X-ray photoelectron spectroscopy. The obtained data were as follows: image 3 , Figure 4 shown.

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Abstract

The invention relates to a preparation method of a nitrogen doped graphene supported gold nano particle (Au / N-G) composite material. The preparation method comprises the following steps: at first, preparing graphite oxide by an improved Hummers method; taking (NH4)2CO3 powder as the nitrogen source to carry out co-reduction and doping under hydrothermal conditions (130 DEG C) to obtain nitrogen doped graphene (N-G), finally dispersing N-G into secondary water under the assistance of ultrasonic waves to obtain a uniform dispersion liquid (0.5 mg / mL), and taking sodium citrate as the reducing agent to reduce HAuCl4 through a microwave radiation method to prepare the nitrogen doped graphene supported gold nano particle, namely nano composite material (Au / N-G). During the experiment process, the prepared nano material is represented by FT-IR, SEM, TEM, XRD, and XPS.

Description

technical field [0001] The invention belongs to the field of electrochemistry and its preparation, and relates to a method for preparing nitrogen-doped graphene-loaded gold nanoparticles. Background technique [0002] Graphene as a unique sp 2 Hybrid two-dimensional single-layer graphite carbon material, its stable hexagonal lattice structure makes it have many excellent physical and chemical properties, such as ultra-high tensile strength (130GPa) and specific surface area (2600m 2 / g), good carrier velocity (15000~25000cm 2 / Vs) and thermal conductivity (5000W / mK); in addition, at room temperature, its special properties such as quantum Hall effect and ferromagnetism have also attracted the attention of researchers. However, because graphene has no energy band gap, its electrical conductivity cannot be completely controlled like traditional semiconductors. In addition, the surface of graphene has no activated functional groups, which is not conducive to the recombination...

Claims

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Application Information

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IPC IPC(8): C01B32/184
Inventor 张纪梅张坤张志秋马庆运
Owner TIANJIN POLYTECHNIC UNIV