Monoporous silica composites of Magagnetic particles, Qi Yue, FE3O4-SBA-15

ITOpenNet 18/07/2021 279

Mesoporous materials refer to a class of porous materials with a pore diameter between 2-50nm. Mesoporous materials have the characteristics of extremely high specific surface area, regular and orderly pore structure, narrow pore size distribution, and continuous adjustment of pore size, which make it difficult to complete the adsorption and separation of macromolecules in many microporous zeolite molecular sieves, especially Play a role in the catalytic reaction.

The water-soluble ferroferric oxide nanoparticles are dispersed in a template containing a template (polyethylene oxide-b-polypropylene oxide-b-polyethylene oxide, P123) and a silicon source (positive In the solution of ethyl silicate (ethanol), a uniform composite film was obtained by volatilizing ethanol at room temperature, and then the template agent P123 was further removed by solvent extraction, and a mesoporous silica composite material doped with magnetic particles (Fe3O4-SBA-15) was obtained. The obtained material has mesoporous pores arranged in a regular and orderly manner, and at the same time, better magnetic Fe3O4-nanoparticles are dispersed in the pore wall. The material has a mesoporous pore diameter of 5.6 nm, a specific surface area of ​​351 m2/g, and a pore volume. It is 0.41 cm3/g, and the magnetic saturation intensity is 16.0 emu/g. This material also shows good magnetic response performance in the solution. Due to its unique magnetic separation characteristics and high specific surface area, the material can quickly remove algae from water. Toxins (MCs) harmful molecules show superior performance, with a removal rate of more than 95%, an adsorption capacity of 2 ng(MCs)/mg, and good repeated use performance. This new type of magnetic mesoporous material is expected to be used to remove water on a large scale Organic pollutants such as algae toxins.

We have: synthetic phospholipids, macromolecular polyethylene glycol derivatives, block copolymers, magnetic nanoparticles, gold nanoparticles and nano gold rods, near-infrared fluorescent dyes, reactive fluorescent dyes, fluorescently labeled dextran BSA and Streptavidin, protein crosslinking agent, small molecule PEG derivatives, counting chemical products, dendrimers, cyclodextrin derivatives, macrocyclic ligands, fluorescent quantum dots, hyaluronic acid derivatives, graphite Alkene or graphene oxide, carbon nanotubes, fullerenes.

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The above content comes from the editor of Qi Yue zzj 2021.5.13

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