low ratio of light utilization and so on, which hinder their
practical applications[11]. A new generation of photocatalysts in
near future is expected to be easy for separation and to have
an enhanced adsorption for polluting molecules. Therefore,
composite photocatalysts were designed by immobilization of
TiO2 on certain support substrates with large surface areas to
enrich dilute pollutants, which have an enhanced
photocatalytic efficiency and can be separated easily from the
aqueous solution