We employed a template of sulfonated PS latex particles
which were prepared by emulsifier free emulsion polymerization
methods. The sulfonated PS latex template will ensure the formation of
smooth and homogeneous shell wall of the hollow spheres, while the
differences in their crystal arrangement will result in the formation of
smaller and denser shell building-blocks which will lead to the blueshift
light absorption characteristics and stronger UV-responsiveness
in comparison to that of common TiO2 photocatalysts.