A kind of gold/carbon composite microsphere and preparation method thereof

Abstract

The invention discloses a gold / carbon compound microsphere and a preparation method thereof. The preparation method comprises the following steps: firstly, stirring a glucose solution under a shielding condition; adding a prepared chloroauric acid solution and then slowly adding a defined amount of trioctylamine; putting the mixed solution into an ultrasonic cleaner for ultrasonically scattering, thereby preparing a milk white micro-emulsion; heating the emulsion through hydrothermal reaction; naturally cooling till room temperature; centrifugally separating the reaction liquid; repeatedly cleaning precipitate alternately with water and absolute ethyl alcohol and drying under vacuum; lastly, and annealing the product under Ar protection, thereby acquiring the gold / carbon compound microsphere. The method provided by the invention is simple in operation; the agglomeration problem of nanometer gold particles is solved; the utilization efficiency is increased; the gold / carbon compound microsphere prepared according to the method is uniform in size distribution; the nanometer gold particles are embedded in a carbon shell; the carbon shell thickness and the size of the nanometer gold particles loaded on the carbon shell both are in nano-scale; the dispersity is excellent; the high performance of nanometer gold is fully utilized.

Description

technical field [0001] The invention belongs to the technical field of composite nanomaterials, and in particular relates to a gold / carbon composite microsphere and a preparation method thereof. Background technique [0002] The development of nanotechnology depends largely on the ability to synthesize new nanomaterials with specific structural and functional properties. Since Gleiter H in Germany prepared 6nm iron nanoparticles for the first time in 1984, the research on metal nanoparticles in the world has been vigorously carried out and great results have been achieved. This new nanomaterial has an atomic and electronic structure different from bulk metals with the same chemical composition. With the continuous development of science and technology, metal nanoparticles and their composite materials have shown extremely important application value in metallurgy, chemical industry, light industry, electronics, national defense, nuclear technology, aerospace and other resea...

AI Technical Summary

Problems solved by technology

There are also some problems in the sol-gel method: the raw materials are expensive, and some raw materials are toxic organic substances; the whole process takes a long time, requiring several days or weeks; Many gases and organic matter, and produce shrinkage

However, because the solvent or surfactant is not easy to elute, the post-treatment of this method is troublesome, and high temperature calcination is required.

Images