Method for preparing gold nano particle and graphene composite material through fast reduction

Abstract

The invention discloses a method for preparing a gold nano particle and grapheme composite material through fast reduction. The method specifically comprises the steps of 1, preparing reduced grapheme oxide water solution by taking sodium borohydride as a reducer; 2, adding gold chloride acid in the reduced grapheme oxide water solution, and obtaining the gold nano particle and grapheme composite material in an in-situ reduction way by utilizing the reducibility of the grapheme through ultrasonic action under normal temperature; 3, centrifugally washing the obtained solution by using de-ionized water for multiple times so as to obtain the gold nano particle and grapheme composite material of which the dimension is uniform and the distribution is uniform. The method disclosed by the invention has the advantages that the technology is simple, the preparation period is short, the repeatability is strong, environment protection is realized, and a composite product is uniform and stable; the prepared gold nano particle and grapheme composite material has good stability in water solution and is not easy to reunite, and meanwhile, the method has the characteristics of multiple reaction active sites, large specific surface area, good biocompatibility, electric conduction and the like; the method has a wide application prospect in aspects of catalyzing, sensing, environment protection, SERS (Surface Enhanced Raman Scattering) and the like.

Description

technical field

[0001] The invention relates to a preparation method of reduced graphene oxide sheets, gold nanoparticles and their composite materials, and belongs to the technical field of material chemical preparation. Background technique

[0002] With the unique surface effect, small size effect and quantum size effect of nanomaterials, gold nanoparticles exhibit different physical and chemical properties from macroscopic materials, and enhance Raman scattering, catalysis, sensing, biomarking, optoelectronics, etc. on the surface. It has wide application value in many fields. But at the same time, due to the large surface energy of nanoparticles, there are problems such as poor stability and easy agglomeration. Therefore, finding a suitable substrate and preparing metal nanoparticle composite materials has become an effective way to exert the effect of gold nanoparticles.

[0003] Graphene is made of carbon atoms with sp 2 A two-dimensional crystal material composed o...

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