4.7 Article

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

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 489, Issue -, Pages 131-137

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.08.013

Keywords

Colloidal laser processing; Catalysis; Hydrogen production

Funding

  1. Italian Ministry for Education, University and Research (MIUR)

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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 30 mmol g(-1) h(-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. (C) 2016 Elsevier Inc. All rights reserved.

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