The formation of gigantic hollow silica spheres from an EO76-PO29-EO76-Butanol-Ethanol-H2O quaternary system

Gigantic hollow silica spheres with a hierarchical intra- and inter-particle porosity were obtained from an EO76–PO29–EO76/butanol/ethanol/H2O quaternary system, which is unique in its extremely rapid silica condensation and in the resulting hierarchical morphology