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Photoluminescence study of anatase and rutile structures of Fe-doped TiO₂ nanoparticles at different dopant concentrations

Lookup NU author(s): Naglaa Nasralla, Mahboubeh Yeganeh, Professor Lidija Siller

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by Springer, 2020.

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Abstract

In this work, dependence of the surface and lattice defects of Fe doped TiO₂ at different iron concentrations and annealing temperatures were monitored by utilizing the photoluminescence (PL) spectroscopy. In order to achieve the maximum spectral resolution, PL spectroscopy was performed in vacuum and at different temperature of 25 to 300 K. It has been found that the photoluminescene properties were significantly influenced by different crystalline structure. The PL spectrum of the rutile 1% and 5% Fe: TiO₂ anatase show similar PL behavior while the emission intensity of the rutile sample was lower than the anatase. This result, which can be explained by the presence of iron ions at the surface for the anatase and the increased oxygen vacancies due to the diffusion of iron into the lattice in rutile, as a result of annealing at high temperature proposes the rutile phase for the applications of environmental photocatalysis.

Publication metadata

Author(s): Nasralla NHS, Yeganeh M, Siller L

Publication type: Article

Publication status: Published

Journal: Applied Physics A

Year: 2020

Volume: 126

Online publication date: 15/02/2020

Acceptance date: 04/02/2020

Date deposited: 09/02/2020

ISSN (print): 0947-8396

ISSN (electronic): 1432-0630

Publisher: Springer

URL: https://doi.org/10.1007/s00339-020-3379-x

DOI: 10.1007/s00339-020-3379-x

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