Method for preparing highly-dispersed regular octahedral platinum nano particles

Abstract

The invention discloses a method for preparing highly-dispersed regular octahedral platinum nano particles. The method comprises the following steps of: 1, preparing chloroplatinic acid stock solution, namely dissolving 0.5 to 2g of chloroplatinic acid (H2PtCl6) in pure water to prepare chloroplatinic acid solution with the concentration of 50 to 400mM; 2, mixing organic matter mixed inducing solution, namely treating polyethylene glycol with the molecular weight of 600 to 2,000 to prepare aqueous solution with the concentration of 0.5 to 2M, and marking the aqueous solution as solution 1; treating one or more of more than 20 kinds of amino acid which is required by a human body to prepare the aqueous solution with the concentration of 0.5 to 2M, and marking the aqueous solution as solution 2; mixing the solution 1 and the solution 2 in a ratio of 1 to 1 to prepare the organic matter mixed inducing solution and marking the solution as solution 3; and 3, performing hydrothermal inducing, namely adding 30 to 60ml of the solution 3 into 100ml of a hydro-thermal reaction kettle, simultaneously adding 1 to 5ml of chloroplatinic acid solution with the concentration of 50 to 400Mm; and stirring the solution for half an hour, performing hydrothermal treatment at the temperature of between 150 and 200 DEG C for 3 to 8 hours, wherein after the hydrothermal treatment, the particle ripening placement time is 4 to 8 hours.

Description

technical field [0001] The invention relates to a preparation method of highly dispersed regular octahedral platinum nanoparticles. Background technique [0002] The broad definition of nanoparticles refers to a class of particles whose particle size reaches the nanoscale. Its narrow definition refers to a class of particles that exhibit different physical and chemical properties from general aggregates after the particle size reaches the nanoscale. [0003] The morphology and crystallinity of nanoparticles have an important impact on their performance. It is of great significance to prepare nanoparticles with uniform size, regular shape and good crystallinity for nanomaterials. Such particles often have good particle effects, characterized by large specific surface area and high catalytic activity, and can be widely used in the field of catalysis. [0004] At present, there are many methods for preparing nanoparticles, such as hydrothermal method, template method, sol-gel...

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Problems solved by technology

[0004] At present, there are many methods for preparing nanoparticles, such as hydrothermal method, template method, sol-gel method, etc. However, it is difficult to obtain nanoparticles with uniform size, regular shape and good crystallinity

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