Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/126987
Title: Photo-induced enhanced Raman spectroscopy as a probe for photocatalytic surfaces
Authors: Ben-Jaber, Sultan
Glass, Daniel
Brick, Thomas
Maier, Stefan A.
Parkin, Ivan P.
Cortés, Emiliano 
Peveler, William J.
Quesada Cabrera, Raúl 
UNESCO Clasification: 23 Química
230117 Espectroscopia Ramn
Keywords: Defected Titanium Dioxide
Oxygen Vacancies
Photo-Induced Enhanced Raman Spectroscopy
Photocatalysis
Surface-Enhanced Raman Spectroscopy
Issue Date: 2023
Project: Desalinización Sostenible: Fotoelectrodos Para la Síntesis de Productos de Interés Industrial A Partir de Salmuera 
Journal: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 
Abstract: Photo-induced enhanced Raman spectroscopy (PIERS) has emerged as a highly sensitive surface-enhanced Raman spectroscopy (SERS) technique for the detection of ultra-low concentrations of organic molecules. The PIERS mechanism has been largely attributed to UV-induced formation of surface oxygen vacancies (Vo) in semiconductor materials, although alternative interpretations have been suggested. Very recently, PIERS has been proposed as a surface probe for photocatalytic materials, following Vo formation and healing kinetics. This work establishes comparison between PIERS and Vo-induced SERS approaches in defected noble-metal-free titanium dioxide (TiO2-x) films to further confirm the role of Vo in PIERS. Upon application of three post-treatment methods (namely UV-induction, vacuum annealing and argon etching), correlation of Vo kinetics and distribution could be established. A proposed mechanism and further discussion on PIERS as a probe to explore photocatalytic materials are also presented. This article is part of the theme issue 'Exploring the length scales, timescales and chemistry of challenging materials (Part 2)'.
URI: http://hdl.handle.net/10553/126987
ISSN: 1364-503X
Source: Philosophical transactions. Series A, Mathematical, physical, and engineering sciences [ISSN 1364-503X, e ISSN 1471-2962 ] ,v. 381, n. 2259, (Octubre 2023)
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