Porous magnets metal formates

Silica coating by the sol-gel process, on the other hand, is conducted in an organic solvent. The process is based on the hydrolysis of the precursors such as tetraethoxysilane (TEQS) in the presence of water and catalyst, followed by condensation with surface metal hydroxyls. With controlled hydrolysis of TEQS, an M — O — Si chemical linkage is established between surface metal atoms (M) and TEQS, followed by lateral polyinerization and finally the formation of a three-dimensional network via the formation of siloxane bonds (Si 0—Si) with increasing TEQS concentration and hydrolysis, A well-known drawback to the sol-gel process for engineering magnetic carriers is the porous nature of the silica... 

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