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Journal of Nanoparticle Research

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01-02-2018 | Research Paper

Microwave-assisted synthesis of TiO₂ nanoparticles: photocatalytic activity of powders and thin films

Authors: G. S. Falk, M. Borlaf, M. J. López-Muñoz, J. C. Fariñas, J. B. Rodrigues Neto, R. Moreno

Published in: Journal of Nanoparticle Research | Issue 2/2018

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Abstract

A simple, rapid, and effective synthesis methodology for the preparation of high-performance TiO₂ nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 min was enough to synthesize crystalline TiO₂ nanoparticles, presenting anatase as a major phase with a crystal size of ~ 7 nm and a specific surface area of 220 m² g⁻¹. A secondary thermal treatment improved the crystallinity and induced the anatase-to-rutile transformation. The highest photocatalytic activity was found for the as-synthesized powder without any additional thermal treatment. Thin films were also prepared by dip-coating and its high photocatalytic activity showed a kinetic curve comparable to that of a thin film of commercial TiO₂ powder prepared under similar conditions.

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Title: Microwave-assisted synthesis of TiO2 nanoparticles: photocatalytic activity of powders and thin films
Authors: G. S. Falk
M. Borlaf
M. J. López-Muñoz
J. C. Fariñas
J. B. Rodrigues Neto
R. Moreno
Publication date: 01-02-2018
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 2/2018
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-018-4140-7

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