High-temperature hydrothermal synthesis of crystalline mesoporous TiO2 with superior photo catalytic activities

► Crystalline mesoporous TiO2 was successfully synthesized at high temperature. ► Novel complex bond interaction results in stable mesopores. ► High-temperature hydrothermal condition can enhance crystallization of TiO2. ► Crystallized mesoporous TiO2 were photo catalytically active in both oxidation and reduction.