fulltext.study @t Gmail

Photocatalytic stability of organic phosphonates and phosphates on TiO2 nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
41066 45876 2011 11 PDF Available
Title
Photocatalytic stability of organic phosphonates and phosphates on TiO2 nanoparticles
Abstract

The stability of organic phosphonates and phosphates anchored to TiO2 under photocatalytic conditions was studied by illumination of modified particles with UV light. Spectroscopic characterization of the particles after different illumination intervals revealed that the organic moieties were completely degraded, while the Ti–O–P bond was stable, leaving phosphate species on the particles’ surface after illumination. The presence of degradation intermediates after moderate illumination times, identified by 13C CPMAS NMR, indicated a sequential degradation of the organic species. Furthermore, the kinetics of the degradation reactions were studied by means of infrared spectroscopy under different conditions. Phosphate anchoring groups were found to result in faster degradation of organic moieties compared to phosphonate coupling groups. Degradation kinetics were moderately slowed down in the absence of water, indicating a co-existence of hydroxyl radical initiated degradation and direct hole oxidation.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (94 K)Download as PowerPoint slideHighlights► The photocatalytic degradation of organophosphonates on TiO2 nanoparticles is studied. ► The organic moieties are degraded while phosphate stays on the particle surface. ► The remaining phosphate enhances the photocatalytic activity of the particles.

Keywords
Organic phosphonates; TiO2 nanoparticles; Photocatalytic degradation; Photocatalytic activity
First Page Preview
Photocatalytic stability of organic phosphonates and phosphates on TiO2 nanoparticles
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 A: General - Volumes 409–410, 15 December 2011, Pages 122–132
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