fulltext.study @t Gmail

Characterization and photostability of Cu2O–Ag–AgBr/Al2O3 for the degradation of toxic pollutants with visible-light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
45038 46395 2014 7 PDF Available
Title
Characterization and photostability of Cu2O–Ag–AgBr/Al2O3 for the degradation of toxic pollutants with visible-light irradiation
Abstract

•Plasmonic photocatalyst Cu2O–Ag–AgBr supported on mesoporous alumina was prepared by deposition–precipitation method.•The coupled photocatalyst exhibited highly photocatalytic performance for the degradation of toxic persistent organic pollutants.•The photoinduced stability of Ag–AgBr can be significantly enhanced by Cu2O cocatalyst.•A plasmon-assisted photocatalytic degradation and metal ion releasing suppression mechanism was proposed.

A plasmonic photocatalyst Cu2O–Ag–AgBr supported on mesoporous alumina (Cu2O–Ag–AgBr/Al2O3) was prepared by deposition–precipitation methods. The samples were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicated that Cu2O–Ag–AgBr nanojunctions were formed by the contact of Cu2O, AgBr and Ag with each other. The catalyst showed high photocatalytic activity and stability for the degradation of toxic persistent organic pollutants under visible light irradiation. The release of metal ions from the catalyst was significantly inhibited during the photodegradation of pollutants. Four interfacial electron transfer process were verified in the photoreaction system of Cu2O–Ag–AgBr/Al2O3 on the basis of electron spin resonance and cyclic voltammetry analyses under a variety of experimental conditions. The results indicated that the coupling of Cu2O with Ag NPs and AgBr not only accelerated interfacial electron transfer processes, leading to the fast photoreduction of the dissolved Ag+ and the photostability of Cu2O. These findings could be useful for the practical application of plasmonic visible light photocatalyst and photovoltaic fuel cells.

Graphical abstractThe schematic charge separation in the Cu2O–Ag–AgBr/Al2O3 heterojunction structure.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ion release; Plasmonic photocatalyst; Visible light irradiation; Nanocomposites; Toxic organic pollutant
First Page Preview
Characterization and photostability of Cu2O–Ag–AgBr/Al2O3 for the degradation of toxic pollutants with visible-light irradiation
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 154–155, July–August 2014, Pages 44–50
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