Abstract
Mesoporous TiO2 was synthesized by a hydrolysis precipitation method with the utilization of the biological renewable resource of lignin as template and TiCl4 as reactant. The photocatalytic activity of TiO2 was investigated by the degradation of phenol under UV light irradiation. The microstructure, crystallinity, powder characteristic, and chemical bonding of the catalyst were analyzed. The 500 °C-calcined TiO2 had average crystallite size of about 11.1 nm and a mesoporous structure with specific area of 165.8 m2/g and pore volume of 0.312 cm3/g. The results showed that TiO2 synthesized with lignin template exhibited high photocatalytic activity, which can be attributed to the electronegativity and the network skeleton of lignin to uniformly distribute the TiO2 precursor for forming TiO2 mesoporous particles. The mechanism for the improved photodegradation of the lignin-assisted TiO2 was proposed.
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