Band gap effect on the photocatalytic activity of supramolecular structures obtained by entrapping photosensitizers in different inorganic supports
Cojocaru B, Neatu S, Parvulescu VI, Dumbuya K, Steinrück HP, Gottfried M, Aprile C, Garcia H, Scaiano JC (2009)
Publication Type: Journal article, Original article
Publication year: 2009
Journal
Original Authors: Cojocaru B., Neau T., Parvulescu V.I., Dumbuya K., Steinrück H.-P., Michael Gottfried J., Aprile C., Garcia H., Scaiano J.C.
Publisher: Royal Society of Chemistry
Book Volume: 11
Pages Range: 5569-5577
Journal Issue: 27
DOI: 10.1039/b902348h
Abstract
Different metallophthalocyanines and 2,4,6-triphenylpyrylium (TP ) ions were entrapped in different inorganic supports such as Y zeolite, mesoporous MCM-41, TiO-SiO and SiO following a specific protocol. The resulting supramolecular structures were characterized by chemical analysis and diffuse reflectance UV-Vis measurements. The determination of the band gap on the basis of UV-Vis measurements showed that the host is not a spectator in this process and an electronic interaction occurs that lowers the band gap of the support. The XPS measurements were performed with an in situ X-ray photoelectron spectrometer, which can be operated at pressures of up to 1 mbar at the sample. They indicated that the formation of the supramolecular structure generates a stable environment, in which the oxidation state of the metal can still be influenced by reaction of the metal center with gas molecules. The photocatalytic tests carried out in photodecomposition of dipropyl sulfide showed a good correlation between the band gap values and the photocatalytic activity for metallophthalocyanine complexes. It is remarkable that the triphenylpyrylium ion follows the same trend observed for metallophthalocyanines, although it is a different type of photosensitizer. © the Owner Societies 2009.
Authors with CRIS profile
Hans-Peter Steinrück
Lehrstuhl für Physikalische Chemie II
Michael Gottfried
Naturwissenschaftliche Fakultät
Additional Organisation(s)
Involved external institutions
University of Bucharest / Universitatea din București
Romania (RO)
Polytechnic University of Valencia / Universidad Politécnica de Valencia
Spain (ES)
University of Ottawa
Canada (CA)
Romania (RO)
Polytechnic University of Valencia / Universidad Politécnica de Valencia
Spain (ES)
University of Ottawa
Canada (CA)
How to cite
APA:
Cojocaru, B., Neatu, S., Parvulescu, V.I., Dumbuya, K., Steinrück, H.-P., Gottfried, M.,... Scaiano, J.C. (2009). Band gap effect on the photocatalytic activity of supramolecular structures obtained by entrapping photosensitizers in different inorganic supports. Physical Chemistry Chemical Physics, 11(27), 5569-5577. https://doi.org/10.1039/b902348h
MLA:
Cojocaru, Bogdan, et al. "Band gap effect on the photocatalytic activity of supramolecular structures obtained by entrapping photosensitizers in different inorganic supports." Physical Chemistry Chemical Physics 11.27 (2009): 5569-5577.
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