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Catalysts 2017, 7(7), 214; doi:10.3390/catal7070214

Sulfur-Doped TiO2: Structure and Surface Properties

Department of Chemistry, NIS (Nanostructured Interfaces and Surfaces) Inter-Departmental Centre and INSTM Centro di Riferimento, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy
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Academic Editors: Vladimiro Dal Santo and Alberto Naldoni
Received: 29 May 2017 / Revised: 30 June 2017 / Accepted: 11 July 2017 / Published: 18 July 2017
(This article belongs to the Special Issue Titanium Dioxide Photocatalysis)
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Abstract

A comprehensive study on the sulfur doping of TiO2, by means of H2S treatment at 673 K, has been performed in order to highlight the role of sulfur in affecting the properties of the system, as compared to the native TiO2. The focus of this study is to find a relationship among the surface, structure, and morphology properties, by means of a detailed chemical and physical characterization of the samples. In particular, transmission electron microscopy images provide a simple tool to have a direct and immediate evidence of the effects of H2S action on the TiO2 particles structure and surface defects. Furthermore, from spectroscopy analyses, the peculiar surface, optical properties, and methylene blue photodegradation test of S-doped TiO2 samples, as compared to pure TiO2, have been investigated and explained by the effects caused by the exchange of S species with O species and by the surface defects induced by the strong H2S treatment. View Full-Text
Keywords: TiO2; S-doping; sulfidation; HRTEM; XRD; UV-visible; FTIR TiO2; S-doping; sulfidation; HRTEM; XRD; UV-visible; FTIR
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cravanzola, S.; Cesano, F.; Gaziano, F.; Scarano, D. Sulfur-Doped TiO2: Structure and Surface Properties. Catalysts 2017, 7, 214.

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