Nano-sized hierarchical titanosilicate TS-1 without extra-framework anatase TiO₂ has been successfully synthesized by using Triton X-100 as a mesoporous template under rotational crystallization conditions. The resultant material contains a large external surface area and uniform mesopores (2–4 nm). Notably, the titanium ions are fully incorporated into the framework of TS-1 and no extra anatase TiO₂ exists. Triton X-100 and rotational crystallization conditions play an important role in eliminating anatase TiO₂. The addition of Triton X-100 slows down the crystallization rate of TS-1, while the rota-crystallization accelerates the incorporation rate of Ti, so that the insertion rate of titanium into the framework matches well with that of silicon. As such, the generation of extra-framework anatase TiO₂ can be inhibited. Furthermore, in comparison with nano-sized hierarchical TS-1 prepared under static conditions, nano-sized hierarchical TS-1 prepared under rotational conditions exhibits excellent catalytic activity and high stability in alkene epoxidation, especially in bulky alkene epoxidation. The facile synthetic strategy for nano-sized hierarchical TS-1 without extra-framework anatase TiO₂ may open new perspectives for its potential application in selective oxidation reactions involving large molecules.

Hierarchical TS-1 zeolites with abundant intracrystalline mesopores are synthesized and show excellent catalytic performance in oxidizing bulky organic compounds.

Hierarchical TS-1 zeolites with intracrystalline mesopores are synthesized via a green surfactant-assisted route, showing excellent performance in oxidative desulfurization.