fulltext.study @t Gmail

Enhancement of the generation of photocatalytic active species by loading copper ions on gold-nanoparticle-deposited titanium dioxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
50553 46801 2015 4 PDF Available
Title
Enhancement of the generation of photocatalytic active species by loading copper ions on gold-nanoparticle-deposited titanium dioxide
Abstract

•Generation of the active species on gold-nanoparticle-deposited TiO2 was promoted.•Cu(II) loaded could suppress the recombination of photoexcited electrons and holes.•Singlet oxygen and superoxide radical were increased by Cu(II) loading.•Mechanism of the enhancement was proposed by considering the charge transfer process.

The photocatalytic performance of gold-nanoparticle-deposited titanium dioxide (AuNP/TiO2) photocatalyst was found to be improved significantly by loading Cu(II) ions, owing to the remarkable enhanced yield of singlet molecular oxygen (1O2) and superoxide radical (O2−), which were detected by near-infrared emission and chemiluminescence photometry, respectively. By loading Cu(II) the TiO2 conduction band electrons caused by the excitation of AuNP are trapped and then the time for reducing O2 to form O2− is prolonged. By the electron trap, the lifetime of holes in AuNP becomes also long to promote the formation of 1O2 by the oxidation of O2−.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Singlet molecular oxygen; Superoxide radical; Gold-nanoparticle; Visible light responsive photocatalyst; Titanium dioxide
First Page Preview
Enhancement of the generation of photocatalytic active species by loading copper ions on gold-nanoparticle-deposited titanium dioxide
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: Catalysis Communications - Volume 61, 10 February 2015, Pages 117–120
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