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Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO$_{2}$ in optically transparent aqueous dispersions

Einert, Marcus; Hartmann, Pascal; Smarsly, Bernd; Brezesinski, Torsten ORCID iD icon 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


In this study, the preparation of anatase TiO2 nanocrystals via a facile non-aqueous sol–gel route and their characterization are reported. The 3–4 nm particles are readily dispersable in aqueous media and show excellent photoreactivity in terms of rhodamine B degradation. The catalytic performance can be further increased considerably by doping with iron and UV-light irradiation as a pre-treatment. The effect of surface ligands (blocked adsorption sites, surface defects etc.) on the photoreactivity was thoroughly probed using thermogravimetric analysis combined with mass spectrometry. Photoelectrochemical characterization of thin-film electrodes made from the same TiO2 nanocrystals showed the opposite trend to the catalytic experiments, that is, a strong decrease in photocurrent and quantum efficiency upon doping due to introduction of shallow defect states.

Verlagsausgabe §
DOI: 10.5445/IR/1000138411
Veröffentlicht am 01.10.2021
DOI: 10.1038/s41598-021-96911-6
Zitationen: 23
Web of Science
Zitationen: 24
Zitationen: 25
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000138411
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Scientific reports
Verlag Nature Research
Band 11
Heft 1
Seiten Art.-Nr.: 17687
Vorab online veröffentlicht am 03.09.2021
Nachgewiesen in Web of Science
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