Preparation method for metal nano particle-doping flexible self-supporting graphene thin film

A metal nanoparticle, graphene film technology, applied in graphene, nanocarbon, nanotechnology and other directions, can solve the problems of less preparation research, many operation steps, complicated methods, etc., and achieves low process requirements and good flexibility. , the effect of simple operation

Inactive Publication Date: 2017-06-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In conclusion, the current methods for preparing metal nanoparticles-modified reduced graphene oxide prepared by chemical methods are complex and require many steps, usually requiring two-step reduction to complete.
Moreover, the prepared composite materials are all graphene films with surface-modified metal nanoparticles, and the preparation of graphene films internally doped with metal nanoparticles is relatively less researched.

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  • Preparation method for metal nano particle-doping flexible self-supporting graphene thin film

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preparation example Construction

[0020] The preparation method of the flexible self-supporting graphene film doped with metal nanoparticles of the present invention comprises the following steps:

[0021] (1) According to the improved Hummers method (ACS Nano 4 (8): 4806 (2010), Improved synthesis of graphene oxide), with graphite as raw material, the preparation concentration is the graphene oxide aqueous solution of 0.2~3mg / ml; The metal salt aqueous solution The concentration is 0.1-20wt.%.

[0022] (2) Mix the graphene oxide solution and the metal salt solution evenly, and the mass ratio of the metal salt to the graphene oxide is 0.1˜10:1. Titrating the mixed solution on the plasma-surface-treated solid substrate, and further vacuum-drying at 50-100 degrees Celsius for 0.5-5 hours to obtain a graphene oxide film;

[0023] (3) Put the thin film on the solid substrate into the ascorbic acid aqueous solution with a concentration of 0.1-10wt.%, and then react at 60-120 degrees Celsius for 1-5 hours to obtain...

Embodiment 1

[0025] Example 1: Preparation of flexible self-supporting graphene conductive film internally doped with nickel nanoparticles

[0026] (1) According to the improved Hummers method (documentation ACS Nano 4(8):4806(2010), Improvedsynthesis of graphene oxide), using graphite as raw material, the graphene oxide aqueous solution whose concentration is 0.5mg / ml is prepared; the configuration concentration is 2mg / ml of nickel acetate aqueous solution;

[0027] (2) Mix the graphene oxide solution and the nickel acetate solution evenly, and the mass ratio of the nickel acetate to the graphene oxide is 0.2:1. The mixed solution was titrated on the plasma surface treated solid substrate, and further vacuum dried at 60 degrees Celsius for 0.5h to obtain a graphene oxide film;

[0028] (3) Putting the graphene oxide film on the glass substrate into the ascorbic acid aqueous solution with a concentration of 0.5wt.%, and reacting for 1h at 95 degrees Celsius to obtain a self-supporting gr...

Embodiment 2

[0030] Example 2: Preparation of flexible self-supporting graphene conductive film doped with gold rice particles on the surface

[0031] (1) According to the improved Hummers method (ACS Nano 4 (8): 4806 (2010), Improved synthesis of graphene oxide), graphite is used as raw material to prepare a graphene oxide aqueous solution with a concentration of 2 mg / ml; the configuration concentration is 4 mg / ml Chlorauric acid aqueous solution;

[0032] (2) uniformly titrate the graphene oxide aqueous solution on the glass substrate treated by plasma surface, and further vacuum-dry 1h at 75 degrees Celsius to obtain the graphene oxide film; further titrate the chloroauric acid solution on the graphene oxide film, chlorine The mass ratio of gold acid and graphene oxide is 2:1. and dried under vacuum at 60 °C for 2 h.

[0033] (3) Put the film on the substrate into a 1.5wt.% ascorbic acid aqueous solution, and react at 95 degrees Celsius for 1 hour to obtain a self-supporting graphene ...

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Abstract

The invention discloses a method for preparing a flexible self-supporting graphene film doped with metal nanoparticles. Firstly, the graphene and the metal salt solution are mixed, and the mixed solution is titrated on a solid substrate and dried to form a film. The obtained film is put into ascorbic acid aqueous solution and heated for reduction to obtain a flexible self-supporting graphene film doped with metal nanoparticles inside. The graphene oxide aqueous solution was firstly titrated on a solid substrate and dried to form a film. Further, the metal salt solution is titrated on the graphene oxide film, and after drying, it is placed in an aqueous solution of ascorbic acid for heating and reduction to obtain a flexible self-supporting graphene film doped with metal nanoparticles on the surface. The method has simple preparation, few reaction steps, convenient operation, simple equipment and process requirements, cheap raw materials, and low cost, and can realize the preparation of graphene films doped with metal nanoparticles inside and graphene films doped with metal nanoparticles on the surface .

Description

technical field [0001] The invention belongs to the technical field of graphene composite material preparation, in particular to a method for preparing a flexible self-supporting graphene film doped with metal nanoparticles. Background technique [0002] Graphene is a two-dimensional layered, single-atom-thick carbon material composed of sp 2 Hybridized carbon atoms are arranged in an orderly manner on a two-dimensional plane. Since its discovery in 2004, graphene has attracted intense attention due to its unique monoatomic layer thickness and planar structure formed by hybridized carbon atoms, high mechanical properties, excellent thermal conductivity and special photochemical properties, and It is used in many fields, such as supercapacitors, nanoelectrochemistry, biological and chemical sensors, and hydrogen storage. [0003] Combining metal nanoparticles and graphene materials can further expand the application of graphene and improve its performance. There are two ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C01B32/184B82Y30/00
CPCC23C18/1639B82Y30/00C01B2204/22C01B2204/32C01P2004/80
Inventor 徐华项建新张明坤路一飞顾忠泽
Owner SOUTHEAST UNIV
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