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Reactivities study of titanium sites in titanosilicate frameworks by in situ XANES

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Abstract

This study focused on the study of titanium sites, their local structure and reactivities in nanoporous titanosilicates frameworks by using in situ X-ray absorption spectroscopy. XANES provides the information on the oxidation state of the titanium species as well as their change in coordination geometry during de- and re-hydration. Results from in situ XANES studies shows that TS-1 is much more hydrophobic than TiAl or TiFe systems. Pre-edge features of Ti K-edge XANES spectra of these materials also suggested that TiIV is the dominant Ti coordination in dehydrated system whilst TiVI is the dominant in the re-hydrated one.

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Acknowledgments

This work was financially supported by the National Foundation for Science and Technology Development, Vietnam (NAFOSTED) under Grant Number 104.05-2013.57.

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Authors and Affiliations

  1. School of Chemical Engineering, C4-306, Hanoi University of Science and Technology, Hanoi, Vietnam

    Hong K. D. Nguyen

  2. Department of Chemistry, UCL, 20, Gordon Street, London, WC1H 0AJ, UK

    Gopinathan Sankar & Richard A. Catlow

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  1. Hong K. D. Nguyen
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  2. Gopinathan Sankar
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  3. Richard A. Catlow
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Correspondence to Hong K. D. Nguyen.

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Nguyen, H.K.D., Sankar, G. & Catlow, R.A. Reactivities study of titanium sites in titanosilicate frameworks by in situ XANES. J Porous Mater 24, 421–428 (2017). https://doi.org/10.1007/s10934-016-0275-z

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  • DOI: https://doi.org/10.1007/s10934-016-0275-z

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