Laser processing of TiO2 colloids for an enhanced photocatalytic water splitting activity

[Display omitted] We have measured the photocatalytic water splitting activity of several titania colloids, modified by nanosecond pulsed laser irradiation. Photocatalysis has been tested using UV and visible light. We have found that laser irradiation increases the hydrogen production efficiency up...

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Bibliographic Details
Published in:Journal of colloid and interface science 2017-03, Vol.489, p.131-137
Main Authors: Filice, Simona, Compagnini, Giuseppe, Fiorenza, Roberto, Scirè, Salvatore, D’Urso, Luisa, Fragalà, Maria Elena, Russo, Paola, Fazio, Enza, Scalese, Silvia
Format: Article
Language:English
Subjects:
Catalysis
Colloidal laser processing
Hydrogen production
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Summary:[Display omitted] We have measured the photocatalytic water splitting activity of several titania colloids, modified by nanosecond pulsed laser irradiation. Photocatalysis has been tested using UV and visible light. We have found that laser irradiation increases the hydrogen production efficiency up to a factor of three for anatase, rutile and P25. A hydrogen production rate as high as 30mmolg−1h−1 has been obtained with good stability, tested by repeated runs. The chemical and morphological properties of the nanoparticles have been studied by electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy, showing that laser irradiation promotes the formation of disordered surface state and lattice distortion which could be responsible for the observed enhanced photocatalytic activity.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2016.08.013