A method for synthesizing high-purity hexagonal columnar silica nanoporous material

Abstract

The invention discloses a method for synthesizing high-purity hexagonal columnar silicon dioxide nanoporous material, which comprises dissolving template agent tetradecyltrimethylammonium bromide in deionized water at 27°C, stirring until the solution is clarified, and then adding Ammonia solution with a mass fraction of 25-28%, after continuing to stir for 10 minutes, add tetraethyl orthosilicate dropwise, stir while adding, the molar ratio of tetraethyl orthosilicate and template agent is 1:0.152, the mixture is in React at 27°C for 1 hour, and control the pH value of the reaction mixture at 10.6-10.8; put the reacted solution into a hydrothermal reaction kettle, then place the hydrothermal reaction kettle in a blast oven to dry, filter and wash to obtain a solid powder , drying, putting the dried sample into a tube furnace to calcinate to remove the template agent, and obtain hexagonal columnar nanoporous silica materials, all of which are hexagonal columnar and uniform in size.

Description

technical field [0001] The invention relates to a method for synthesizing a high-purity hexagonal columnar silicon dioxide nanoporous material, which belongs to the field of material science research. Background technique [0002] As a member of nanomaterials, nanoporous materials have a large specific surface area structure and properties, so they occupy a unique position in the field of nanotechnology. Nanoporous silica with controllable appearance and morphology has a wide range of applications in the fields of catalysis, drug delivery and chromatography materials. [0003] The synthesis of MCM-41, a typical representative of nanoporous silica with a pore size of 2-50nm, was first started by Mobil Corporation. MCM-41 nanoporous silica particles can exhibit different morphologies, or synthesize materials that can be controlled to generate special shapes. The main reason is that under these conditions, the rate of nanopore generation is too fast, grows rapidly in the dire...

AI Technical Summary

Problems solved by technology

[0004] Although it has been more than thirty years since the discovery of MCM-41, the mechanism of nanopore formation is still debated, and it is still far from fully understanding the generation of MCM-41 nanopore structure.

Images