Silicon-based mesoporous material and preparation method thereof

Abstract

The invention relates to the field of chemistry, and particularly relates to a silicon-based mesoporous material and a preparation method thereof. For 1 mol of added silicon source, the silicon-based mesoporous material comprises the following raw materials (measured by mol): 0-120 mol of anhydrous ethanol, 70-400 mol of water, 0.25-0.5 mol of ammonia water, 0.1-0.35 mol of quaternary ammonium salt cationic surfactant, 0.025-0.20 mol of beta-alanine and ethyl orthosilicate. The preparation method comprises the following steps: weighing the raw materials; mixing anhydrous ethanol and water to prepare a first mixed solution; adding quaternary ammonium salt cationic surfactant into the first mixed solution to prepare a second mixed solution; adding beta-alanine into the second mixed solution to prepare a third mixed solution; adding ammonia water into the third mixed solution to prepare a fourth mixed solution; and adding ethyl orthosilicate into the fourth mixed solution to prepare the silicon-based mesoporous material. The invention can enhance the adsorption capacity of the silicon-based mesoporous material.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a silicon-based mesoporous material and a preparation method thereof. Background technique [0002] In 1992, Beck and Kresge of Mobil Corporation of the United States announced that M41s with a mesoporous structure was obtained by using a cationic surfactant as a template in an alkaline medium and hydrothermal purification. It has been highly valued by the chemistry and materials science community, and has rapidly developed into one of the interdisciplinary research hotspots. [0003] The types of mesoporous materials mainly include M41S, SBA, HMS, MSU, etc. Different types of mesoporous materials exhibit different performances during application due to differences in pore structure, pore size, and pore wall properties. [0004] In order to meet the application requirements in various fields, the material science community is committed to the modification of mesoporous materials, mainl...

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Problems solved by technology

Among them, the grafting of organic groups mostly adopts the silylation method, and the method of using silylation reagents to introduce ligands into silica molecular sieves also includes the in-situ copolymerization method, and the degree of order of the materials prepared by the in-situ copolymerization method Usually relatively low; and the price of silylating reagents increases, and there are difficulties in the coordination between R-groups and metal ions in silylating reagents

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