High-yield synthesis of monodispersed SBA-15 equilateral hexagonal platelet with thick wall

摘要

Monodispersed SBA-15 equilateral hexagonal platelets with thick silica wall have been synthesized at high yield (approx 100 percent) by a static self-assembly strategy in the presence of commercial non-ionic block copolymer P104 and inorganic salt under acidic conditions. The results of the experiments show that the synthesized materials have a uniform internal structure of the well-ordered hexagonal mesoporous channels arrayed vertically to the platelet face, and a high monodispersity both in external morphology and particle size. An external morphological evolvement from hexagonal corona to crystal-like hexagonal platelet and then to biscuit-like hexagonal plate, as well as an increase of the pore size and a decrease of the silica wall thickness with increasing K_2SO_4 concentrations in the template solution, has been found.