| Title: | Single-Step Synthesis of SnS(2) Nanosheet-Decorated TiO(2) Anatase Nanofibers as Efficient Photocatalysts for the Degradation of Gas-Phase Diethylsulfide |
| Author(s): | Christoforidis KC; Sengele A; Keller V; Keller N; |
| Address: | "Institut de Chimie et Procedes pour l'Energie, l'Environnement et la Sante (ICPEES), CNRS, University of Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "We report on a facile one-step soft hydrothermal process for synthesizing 1D anatase TiO2 nanofibers decorated with ultrathin SnS2 nanosheets. H-titanate nanofibers were used as preshaped Ti precursor. Under controlled conditions, the H-titanate structure was transformed into anatase maintaining the fibril morphology, while at the same time SnS2 nanosheets were grown in situ on the surface of the nanofibers. The successful formation of SnS2 nanosheets on the TiO2 nanofibers was confirmed by high-resolution TEM, and together with XPS spectroscopy, the tight interface formed between the SnS2 and the anatase TiO2 nanofibers was verified. The 1D SnS2/TiO2 hierarchical nanostructures with semiconductor heterojunction were proven to be very efficient under artificial solar irradiation in the photocatalytic degradation of gaseous diethylsulfide as simulant for live yperite chemical warfare agent as well as model substrate for malodorous organosulfide volatile organic compounds. SnS2 did not operate as a visible light sensitizer for TiO2 but rather as an oxidizing agent and charge-carrier separator. The semiconductor ratio in the heterostructure controlled the photoactivity. Samples with no or high content of SnS2 were less active than those with moderate SnS2 content. Enhanced reactivity was ascribed to an efficient separation of the photogenerated charge carriers driven by the differences in band edge positions and favored by the tight interface within the coupled heterostructure" |
| Keywords: | H-titanate SnS2 TiO2 chemical warfare agents diethylsulfide degradation heterojunction hierarchical nanostructure photocatalysis; |
| Notes: | "PubMed-not-MEDLINEChristoforidis, Konstantinos C Sengele, Armelle Keller, Valerie Keller, Nicolas eng Research Support, Non-U.S. Gov't 2015/08/12 ACS Appl Mater Interfaces. 2015 Sep 2; 7(34):19324-34. doi: 10.1021/acsami.5b05370. Epub 2015 Aug 18" |
