The discovery of titanium silicalite-1 (TS-1) is a milestone in the development of
heterogeneous catalysts for the eco-benign and mild catalytic oxidation process. However,
the interpretation of specific Ti location and its role in oxidation is severely hindered due to
the limited crystal size of as-synthesized TS-1. Here, a high quality TS-1 (ca. 10 μm) was
successfully fabricated by the pre-hydrolysis silica source strategy. As evidenced by powder
X-ray diffraction crystallography, the preferred Ti locations were mainly found at T2, T4, and …