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China Drying Network News Dr. Wang Qi, Ph.D., from the Plasma Institute Institute of Applied Physics, Hefei Institute of Physics, Chinese Academy of Sciences, successfully prepared a graphene nanocomposite with good dispersion using low-temperature plasma technology. The related results have been published in Applied Physics Letters, a top journal in applied physics. This method is fast, convenient and environmentally friendly. It avoids the use of chemical reducing agents and opens up new ideas and methods for preparing graphene precious metal particles. With the development of low-temperature plasma technology, it is expected to achieve low-cost, large-scale production of this material.
Graphene-platinum composites can improve the reaction efficiency of fuel cells and have a wide range of application prospects in aerospace, energy, environmental and other fields. However, the graphene noble metal composites prepared by traditional chemical methods need to use chemical reagents to reduce precious metals such as platinum, gold, etc.; and surfactants are often used to improve the dispersibility of nano-metal particles and affect the properties of the materials themselves. , And the preparation process is lengthy and brings about environmental pollution.
After a large number of experimental studies, the research group found that plasma treatment on the surface of graphene oxide and metal complexes can simultaneously reduce graphene oxide and platinum salt precursors, and then directly produce graphene platinum nanocomposites. In a self-made inductively coupled plasma discharge device, a mixture of graphene oxide and chloroplatinic acid was placed in advance, and then argon plasma was directly applied to the mixture. Graphene oxide was rapidly converted to graphene, while chlorine Platinum acid is reduced to pure platinum, and graphene-platinum nanocomposites are prepared in one step. The degree of dispersion and particle size of the obtained platinum particles are related to the time of plasma action.
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