Synthesis of large-pore silica with cage-like structure using sodium silicate and triblock copolymer template

摘要: Silicas with large (about 10 nm in diameter), uniform, cage-like pores were synthesized from sodium silicate and poly (ethylene oxide)− poly (butylene oxide)− poly (ethylene oxide) B50-6600 triblock copolymer template (EO39BO47EO39) under acidic conditions. The synthesis procedure was analogous to that reported by others for FDU-1 silica with highly ordered cubic Im 3 m structure, but in our study, an expensive tetraethyl orthosilicate (TEOS) was successfully replaced by cost-efficient sodium silicate. Adsorption and thermogravimetric …