Aerosol route to TiO2–SiO2 catalysts with tailored pore architecture and high epoxidation activity

03 January 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We present the aerosol-assisted sol-gel preparation of hierarchically porous TiO2–SiO2 catalysts having a sphere-like shell morphology and a high Ti dispersion. In order to control the porosity at the micro-, meso- and macro- levels, we use the evaporation-induced self assembly (EISA) of a surfactant, possibly combined with polymer beads as hard templates. These catalysts are tested for the epoxidation of cyclohexene with cumene hydroperoxide as oxidant, and their performance is compared to the reference TS-1 zeolite. The high catalytic performance observed with the catalysts prepared by aerosol stems from their high specific surface area, but also from the short diffusion path length generated by the meso-/macro-pore architecture which provide entryways for bulky reactants and products.


Aerosol-assisted sol-gel
epoxidation catalyst
hierarchically porous materials

Supplementary materials

Smeets Debecker TiSi Aerosol epoxidation - ESI - ChemRxiv


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