Synthesis of a highly active oxidation catalyst with improved distribution of titanium coordination states.

A facile strategy is proposed to construct a highly active oxidation catalyst with optimally distributed titanium coordination states containing "TiO4" and "TiO6" species. The "TiO6" species in TS-1(+) shows a superior catalytic oxidation activity, which is 2-3 times that of "TiO4" species in TS-1.