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Zeolite films: a new synthetic approach

DOI: 10.1039/c2ta00528j DOI Help

Authors: Davinder Bhachu (University College London) , Andy Smith (University College London) , Ivan Parkin (University College London) , Andrew Dent (Diamond Light Source Ltd) , Gopinathan Sankar (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Materials Chemistry A

State: Published (Approved)
Published: December 2012

Abstract: Dense, adhesive zeolitic films were made for the first time by combining chemical vapour deposition (CVD) and hydrothermal methods. This new method uses a CVD process to deposit dense amorphous silica or titanium doped silica films which are then converted to a crystalline nanoporous zeolite by a hydrothermal process using an organic structure directing agent. To demonstrate the capability of the method, silicalite-1 (S-1) and titanium silicalite-1 (TS-1) zeolites were prepared. Both X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed the presence of crystalline zeolite films with well-defined morphology. Ti K-edge X-ray absorption spectroscopy (XAS) revealed the presence of the metal ions in the framework of the zeolitic matrix and in isolated, tetrahedral sites both in the amorphous and crystalline zeolite films. Both the pores and the titanium centres in the films were also shown to be accessible for molecules, by reacting with n-hexene and H2O2.

Subject Areas: Chemistry

Instruments: B18-Core EXAFS

Added On: 07/12/2012 09:34

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