fulltext.study @t Gmail

Iron–sulfur codoped TiO2 anatase nano-materials: UV and sunlight activity for toluene degradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
46382 46438 2012 7 PDF Available
Title
Iron–sulfur codoped TiO2 anatase nano-materials: UV and sunlight activity for toluene degradation
Abstract

Iron and sulfur single- and co-doped TiO2 nanocrystals were prepared and characterized by a multitechnique approach. The presence of sulfur affected drastically the crystal size of anatase as well as other morphological characteristics such as BET surface area, pore volume and pore size. Significant differences were also detected on the isolated OH species concentration as a function of sulfur content. On the contrary, X-ray absorption spectroscopy (XAFS) showed that sulfur did not alter substantially the structural and electronic properties of Fe on TiO2. The photocatalytic activity of the synthesized TiO2 powders was studied in the gas-phase oxidation of toluene. The trials showed that the co-doped S/Fe-TiO2 nanomaterials have enhanced photo-activity compared to the reference single-doped Fe-TiO2 under both sunlight and UV-light irradiation. This is not however the case if compared with the single S-doped materials. Sulfur additionally modifies the selectivity of toluene photo-oxidation toward partial oxidation products. The partial vs. total oxidation yield ratio increased with increasing S content in both co-doped S/Fe-TiO2 or single-doped S-TiO2 series and was attributed to differences in surface properties related to both S-containing and OH entities.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► S affected significantly the morphological characteristics of TiO2 catalysts. ► S/Fe co-doped TiO2 show enhanced photoactivity compared to Fe single-doped TiO2. ► Selectivity of partial oxidation products was increased with increasing S-content. ► The differences in photoactivity and selectivity are surface properties related.

Keywords
Photocatalysis; Titania; Anatase; Iron; Fe; Sulfur; Co-doping; Selective partial oxidation; Toluene; Benzaldehyde
First Page Preview
Iron–sulfur codoped TiO2 anatase nano-materials: UV and sunlight activity for toluene degradation
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 117–118, 18 May 2012, Pages 310–316
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us