Mesoporous TiO2 Coated ZnFe2O4 Nanocomposite Loading on Activated Fly Ash Cenosphere for Visible Light PhotocatalysisHougang Fan & Dandan Chen & Xuefeng Ai & Shuo Han & Maobin Wei & Lili Yang & Huilian Liu & Jinghai Yang2018PDF1.7 MBEN