fulltext.study @t Gmail

The influence of platinum (II) on TiO2 photocatalyzed dye decolourization by rutile, P25 and PC500

Paper ID Volume ID Publish Year Pages File Format Full-Text
27323 44016 2011 7 PDF Available
Title
The influence of platinum (II) on TiO2 photocatalyzed dye decolourization by rutile, P25 and PC500
Abstract

The effect of deposition of 0.38% Pt(II) on the UV photocatalyzed decolouration of Reactive Orange 16 (RO16) and Malachite Green (MG) is reported for rutile TiO2, for anatase PC500, and for the mainly anatase P25. The metal loading and oxidation state were those that previously [17], gave the largest enhancement (×37) of the UV photocatalyzed degradation of DCA, when Pt was deposited on rutile. For rutile, Pt(II) deposition enhanced the rate of UV decolouration (×20, for RO16, or ×8, for MG). For PC500, Pt(II) deposition on PC500 reduced the decolouration of RO16 and increased the UV photocatalyzed decolouration of MG by only ×1.2. On P25, Pt(II) significantly reduced the UV photocatalyzed decolouration of both dyes. Previously, [17], Pt(II) deposition on P25 enhanced DCA degradation by a factor of only 1.5. Complementary measurements showed that visible-light photocatalytic decolouration rates were small on all the catalysts. It was inferred that platinum influences the UV photocatalysis by facilitating the electron transfer to adsorbed oxygen, and that this facilitation is much more important for rutile than for anatase because formation of O2− is more difficult on Pt-free anatase than on Pt-free rutile.

► Platinum on rutile increased (×20) Reactive Orange photocatalytic decolouration. ► Platinum on rutile increased (×8) Malachite Green photocatalytic decolouration. ► Pt on anatase (PC500) increased Malachite Green decolouration by a factor of only 1.2. ► Platinum reduced the decolouration rate of both dyes on P25. ► Because electron transfer on rutile is difficult, the effect of Pt is greater on rutile.

Keywords
UV photocatalysis; Platinum; High area rutile; Dye decolouration
First Page Preview
The influence of platinum (II) on TiO2 photocatalyzed dye decolourization by rutile, P25 and PC500
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: Journal of Photochemistry and Photobiology A: Chemistry - Volume 224, Issue 1, 15 November 2011, Pages 31–37
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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