Preparation of Composite Hollow Spheres via Heat-treatment of Imogolite-Polyelectrolyte Layer-by-Layer Core-Shell Particles

Abstract

Core-shell particles were formed by layer-by-layer assemblies of imogolite and poly(sodium 4-styrenesulfonate) on the polystyrene beads coated preliminarily with poly(diallyldimethylammonium chloride). Composite hollow spheres composed of dehydroxylated imogolite and carbon were prepared by heat-treatment of the core-shell particles at 400 degree C. It is considered that polystyrenes in the core were carbonized and remained in the shells by heat-treatment on the basis of the results of TG-DTA, SEM, EDX, TEM. The hollow particles have high porosities, and they adsorbed both water and toluene.