High Level Material Silicon Briquette

Synthesis of surface-modified silicon briquette with molecularly imprinted aminofunctional adsorbent materials for pentachlorophenol. A high-selectivity adsorbent material was synthesized by combining the advantages of molecular imprinting technology and sol-gel technology. The surface of the silica spheres was activated to generate reactive hydroxyl groups. Trimethoxyaminopropyl silane, which contains functional groups, formed a complex with pentachlorophenol. The complex was hydrolyzed and condensed with the activated silica spheres, grafting the complex onto the surface of the silica spheres. After extraction with hydrochloric acid, the template pentachlorophenol was removed, leaving specially designed cavities on the modified silica spheres. The synthesis principle and process are simple, with no harsh conditions required. The synthesized material has very high selectivity for pentachlorophenol, with ample exposure of imprint sites and fast mass transfer rates, making it suitable for developing new technologies for flow injection online solid-phase selective preconcentration in conjunction with modern analytical instruments.

1.A preparation method for nano-magnetic silicon briquette, which can be used in chemical engineering, environmental protection, and biomedical fields. First, ferrous salt is chosen as the catalyst to catalyze the conversion of nickel salt and ferric salt into nickel ferrite magnetic nanoparticles through a low-temperature catalytic phase transformation method. Then, under the action of a surfactant, the nickel ferrite magnetic nanoparticles are dispersed in a reverse micelle solution, and through a gelation process, silica is coated on the nickel ferrite nanoparticles to form nano-magnetic silica spheres. The resulting nano-magnetic silica spheres have a particle size of 50 nm, with a mass ratio of nickel ferrite nanoparticles to silica coating less than 10. This provides a huge surface area for loading active components in different application fields. TiO2 photocatalysts can be loaded onto the nano-magnetic silica spheres to obtain magnetic separation photocatalysts, which can be effectively used for water purification and treatment.

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