Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions

Abstract 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 per...

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Autores principales:	Marcus Einert, Pascal Hartmann, Bernd Smarsly, Torsten Brezesinski
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a823031f126b49519ce565d556fb2b90
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spelling	oai:doaj.org-article:a823031f126b49519ce565d556fb2b902021-12-02T16:37:37ZQuasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions10.1038/s41598-021-96911-62045-2322https://doaj.org/article/a823031f126b49519ce565d556fb2b902021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96911-6https://doaj.org/toc/2045-2322Abstract 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.Marcus EinertPascal HartmannBernd SmarslyTorsten BrezesinskiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marcus Einert Pascal Hartmann Bernd Smarsly Torsten Brezesinski Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
description	Abstract 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.
format	article
author	Marcus Einert Pascal Hartmann Bernd Smarsly Torsten Brezesinski
author_facet	Marcus Einert Pascal Hartmann Bernd Smarsly Torsten Brezesinski
author_sort	Marcus Einert
title	Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
title_short	Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
title_full	Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
title_fullStr	Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
title_full_unstemmed	Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions
title_sort	quasi-homogenous photocatalysis of quantum-sized fe-doped tio2 in optically transparent aqueous dispersions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a823031f126b49519ce565d556fb2b90
work_keys_str_mv	AT marcuseinert quasihomogenousphotocatalysisofquantumsizedfedopedtio2inopticallytransparentaqueousdispersions AT pascalhartmann quasihomogenousphotocatalysisofquantumsizedfedopedtio2inopticallytransparentaqueousdispersions AT berndsmarsly quasihomogenousphotocatalysisofquantumsizedfedopedtio2inopticallytransparentaqueousdispersions AT torstenbrezesinski quasihomogenousphotocatalysisofquantumsizedfedopedtio2inopticallytransparentaqueousdispersions
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Quasi-homogenous photocatalysis of quantum-sized Fe-doped TiO2 in optically transparent aqueous dispersions

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