NDLI: Enhanced Photodegradation of Toxic Pollutants on Plasmonic Au–Ag

Content Provider	Springer Nature Link
Author	Peng, Tianwei Hu, Chun Hu, Xuexiang Zhou, Xuefeng Qu, Jiuhui
Copyright Year	2012
Abstract	Au–Ag–AgI nanoparticles (NPs) were uniformly dispersed onto mesoporous alumina by deposition–precipitation and photoreduction at low temperature. Compared with Ag–AgI/Al2O3, the catalyst showed higher photocatalytic activity under visible irradiation. In particular, the release of metal ions from the catalyst was significantly inhibited during photodegradation of pollutants. Electron spin resonance and cyclic voltammograms studies under a variety of experimental conditions verified that the coupling of Au and Ag NPs increased the efficiency of light energy conversion and accelerated interfacial electron transfer processes. The main active species involved in the photoreaction of Au–Ag–AgI/Al2O3 were O2 •− and excited h+ on the metal NPs. The presence of several ubiquitous anions, including HCO3 −, SO4 2−, and NO3 − could act as electron donors trapping excited h+ on the metal NPs to facilitate electron circulation. The results obtained herein indicated that coupled, noble, bimetal NPs exhibited high photosensitivity and photostability due to enhanced surface plasmon resonance and interfacial electron transfer.Addition of Au made Au–Ag–AgI nanoparticles (NPs) disperse more uniformly onto mesoporous Al2O3 and showed higher photocatalytic activity under visible irradiation.
Starting Page	646
Ending Page	654
Page Count	9
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	142
Issue Number	5
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2012-03-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Visible light photocatalyst Semiconductor-metal nanocomposites Noble bimetal Ion release Physical Chemistry Organometallic Chemistry Industrial Chemistry/Chemical Engineering Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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