Reactivity screening of anatase TiO2 nanotubes array and anatase thin films: A surface chemistry point of view

S. Funk, B. Hokkanen, T. Nurkic, J. Goering, E. Kadossov, U. Burghaus, A. Ghicov, P. Schmuki, Z. Q. Yu, S. Thevuthasan, L. V. Saraf

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

As a reactivity screening we collected thermal desorption spectroscopy (TDS) data of iso-butane, O2, CO2 , and CO adsorbed on an ordered TiO2 nanotubes (TiNTs) array. As a reference system iso-butane adsorption on an anatase TiO2 thin film has been considered as well. The as-grown TiNTs are vertically aligned and amorphous. Polycrystalline (poly.) anatase or poly. anatase/rutile mixed nanotubes are formed by annealing confirmed by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The anatase thin film was grown on SrTiO3(001) and characterized by XRD and atomic force microscopy (AFM). Surprisingly, oxygen distinctly interacts with the TiNTs whereas this process is not observed on fully oxidized single crystal rutile TiO2(110). Desorption temperatures of 110-150 K and 100-120 K were observed for CO2 and CO, respectively, on the TiNTs. Variations in the binding energies of the alkanes on TiNTs and anatase thin films also were present, i.e., a kinetic structure-activity relationship (SAR) is evident.

Original languageEnglish
Title of host publicationACS Symposium Series
PublisherAmerican Chemical Society
Pages139-151
Number of pages13
Volume996
ISBN (Print)9780841269699
DOIs
Publication statusPublished - 19 Sep 2008
Externally publishedYes

Publication series

NameACS Symposium Series
Volume996
ISSN (Print)00976156
ISSN (Electronic)19475918

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Funk, S., Hokkanen, B., Nurkic, T., Goering, J., Kadossov, E., Burghaus, U., Ghicov, A., Schmuki, P., Yu, Z. Q., Thevuthasan, S., & Saraf, L. V. (2008). Reactivity screening of anatase TiO2 nanotubes array and anatase thin films: A surface chemistry point of view. In ACS Symposium Series (Vol. 996, pp. 139-151). (ACS Symposium Series; Vol. 996). American Chemical Society. https://doi.org/10.1021/bk-2008-0996.ch011