Metal/grapheme nanocomposite and preparation method thereof

Abstract

The invention discloses a metal / grapheme nanocomposite and a preparation method thereof. The method comprises a photo-reduction one-step method and a photocatalytic reduction one-step method. The photo-reduction one-step method comprises the steps as follows: a grapheme oxide and metal complex acid or inorganic salt and a photo-reduction agent are mixed at the room temperature or under the condition of an ice-water bath, and under the light condition, organic negative hydrogen donors reduce metal ions and the grapheme oxide, so that a product is obtained. One approach of the photocatalytic reduction one-step method comprises the steps as follows: the grapheme oxide and the metal complex acid or salt are mixed in a DMF (dimethyl formamide) water solution containing a reducing agent, a metal ligand and a photocatalyst or in a water solution, catalysis is performed through the catalyst under the light condition, and at the same time, the reducing agent reduces the metal ions and the grapheme oxide, so that a product is obtained; and the other approach of the photocatalytic reduction one-step method comprises the steps as follows: the grapheme oxide and a metal organic complex are mixed in a DMF water solution containing the reducing agent and the photocatalyst or in a water solution, then catalysis is performed through the catalyst under the light condition, and the reducing agent reduces the metal organic complex and the grapheme oxide, so that a product is obtained.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a metal / graphene nanocomposite method. Background technique [0002] Nanomaterials are an important research and development direction in nanoscience. In recent years, they have attracted extensive attention in many scientific fields and become a hot spot in material science research. As one aspect of nanomaterials, metal and its alloy nanoparticles play an important role in the development of modern industry, national defense and high technology. [0003] Noble metal nanomaterials such as palladium, platinum, gold, etc. are catalysts widely used in major energy and environmental fields such as the petroleum industry, automobile exhaust purification, and fuel cells. It also has important application prospects. However, due to the scarcity of noble metal reserves, how to improve the activity and selectivity of noble metal catalysts, thereby reducing their ...

AI Technical Summary

Problems solved by technology

The physical method has the following disadvantages: if large-scale equipment is required, the size of the prepared particles is large, and it is difficult to control the size and shape of the particles

However, the sodium borohydride used in the liquid phase reduction method usually makes the prepared nanoparticles contain boron, the carbonyl salt used in the thermal decomposition method is often toxic, and in the microemulsion method, it is often necessary to add surfactants such as oleic acid , TDA, HDA, ODA, etc., the reaction process is complex

At present, graphene-cobalt nanocomposites have not been reported so far, so it is necessary to find a convenient and simple chemical method and inexpensive chemical reagents to synthesize this composite material

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