Template-free Hydrothermal Preparation of Mesoporous TiO2 Microspheres on a Large Scale

摘要

Mesoporous TiO2 microspheres have been made on a large scale by a simple hydrothermal method without using any surfactants or templates. The products were characterized by XRD, SEM, TEM, SAED, nitrogen adsorption, and UV-vis spectroscopy. Results indicate that the T1O2 microspheres, with a diameter of 0.8-1.2 μm, are composed of numerous TiO2 nano-crystals with an average diameter of 5.6 nm. The average pore size, BET surface area, and optical band-gap energy of the microspheres are 4.0 nm, 185.6m~2/g, and 3.42 eV, respectively.