The b-oriented TS-1 films on α-Al2O3 substrates were synthesized by using in situ crystallization by the inducing effect of the chitosan thin film.The synthesized TS-1 films were characterized with XRD and SEM.The functional groups on the chitosan film surface and the interactions between the chitosan film and synthesis solution were described by using diffuse-reflectance FT-IR and contact angle measurements.It was shown that the b-oriented TS-1 film could be synthesized with the help of the chitosan thin film

whereas the randomly oriented TS-1 film was obtained on the α-Al2O3 substrate without chitosan induction.The XRD patterns of the synthesized films revealed that the crystals possessed TS-1 zeolite structure.The diffuse-reflectance FT-IR spectrum and contact angle measurements exhibited that the functional groups were abundant on the surface of the chitosan thin film

which could attract organic and inorganic compounds.Therefore

a transitional layer could be formed on the chitosan film

with nucleation and crystal growth to sheet-shaped TS-1 crystal grains

eventually leading to the formation of the multilayer b-oriented TS-1 film.