Synthesis and characterization of iodine ion doped mesoporous TiO2 by sol-gel method

► Anatase and mesoporous TiO2 doped with iodine ion is prepared by improved gel-sol method. ► Iodine ion may combine with hydroxyl to form macromolecular complex. ► Iodine ion plays a part in structure-directing and structure-supporting to some extent. ► The calcination temperature affects the morphology of iodine ion doped TiO2 nanoparticles.