Surfactant/co-polymer template hydrothermal synthesis of thermally stable, mesoporous TiO_2 from TiOSO_4

摘要

Industrial TiOSO_4 solution was used as inorganic precursor to prepare mesoporous titania via composite template route, using cetyl-trimethylammonium bromide (CTAB) and tri-block copolymer EO_(20)PO_(70)EO_(20) (P-123) as structure-directing agents (SDA) under high acidic conditions. Mesoporous TiO_2 with high thermal stability was obtained via controlling the hydrolysis and condensation rate of industrial TiOSO_4 solution by adjusting the pH value and post hydrothermal treating. The as-prepared materials were characterized by XRD, nitrogen adsorption-desorption, SEM and HRTEM. The powder calcined at 723 K for 2 h showed higher thermal stability, with BET specific surface area of 218.7 m~2/ g and an average pore diameter of 3.63 nm.