Sulfur-Doped TiO2: Structure and Surface Properties

Catalysts

Sara Cravanzola¹  Federico Cesano¹  Fulvio Gaziano¹  Domenica Scarano¹ 

[1] 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;

关键词: TiO2;    S-doping;    sulfidation;    HRTEM;    XRD;    UV-visible;    FTIR;   

DOI  :  10.3390/catal7070214

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown