Technological method for preparing nickel/silicon dioxide supported catalyst by laser liquid phase

Abstract

The invention discloses a technological method for preparing a nickel / silicon dioxide supported catalyst by laser liquid phase. The technological method comprises the following steps of firstly, carrying out polishing and ultrasonic cleaning on a massive metallic nickel target used as a raw material, and blow-drying residual water on the surface of the nickel target; then dispersing silicon dioxide solid powder into deionized water; then putting the treated nickel target into the solution, and adjusting the liquid level height to be greater than 5mm and less than 25mm; ablasting the target by adopting nanosecond focused pulsed laser under the auxiliary action of magnetic stirring and electric translation for 1 hour so as to obtain nickel / silicon dioxide suspension; then carrying out suction filtration on the suspension, and drying so as to obtain the nickel / silicon dioxide powdery supported catalyst. According to the invention, the technological method is simple in synthesis method, is convenient to operate, and is easy to control; byproducts and impurities are not generated; a supported catalyst with small size which is synthesized in a liquid phase by one step at normal temperature and normal pressure is provided; the technological process is an environment-friendly synthesis process.

Description

technical field [0001] The invention relates to a supported catalyst, in particular to a process method for preparing a nickel / silicon dioxide supported catalyst in liquid phase by a laser method. Background technique [0002] Transition metal nickel catalysts have the advantages of low cost and high activity, and are widely used in catalytic oxidation, hydrogenation and dehydrogenation reactions, CH4 / CO2 reforming, carbon nanotube preparation and cracking oil reforming reactions. The catalytic activity of the catalyst can be significantly improved by nanonizing and doping nickel into various catalyst supports. For example: supporting nickel on silica can effectively catalyze the decomposition of methane to produce methanol, see: Lei Li, Yao Yao et al. Highly Active and Stable Lanthanum-doped Core–Shellstructured NiSiO2 Catalysts for the Partial Oxidation of Methane to Syngas.ChemCatChem2013, 5, 3781–3787. At the same time, compared with noble metal catalysts, nickel is che...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing preparation technology is difficult to synthesize small size, strong binding force, and high catalytic performance. The use of short-pulse nanosecond laser can control the size and the characteristics of extremely unbalanced conditions, sputtering metal Nano-droplets are combined with the surrounding solid medium to provide a supported catalyst with excellent synthesis performance in the liquid phase using nano-laser ablation.

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