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Highly Efficient Visible Light Plasmonic Photocatalyst Ag@Ag(Br,I)
Author(s) -
Wang Peng,
Huang Baibiao,
Zhang Qianqian,
Zhang Xiaoyang,
Qin Xiaoyan,
Dai Ying,
Zhan Jie,
Yu Jiaoxian,
Liu Haixia,
Lou Zaizhu
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200903361
Subject(s) - photocatalysis , visible spectrum , plasmon , x ray photoelectron spectroscopy , surface plasmon resonance , materials science , photochemistry , iodide , silver bromide , nanoparticle , bromide , nanotechnology , inorganic chemistry , chemistry , catalysis , optoelectronics , chemical engineering , silver halide , organic chemistry , layer (electronics) , engineering
The new plasmonic photocatalyst Ag@Ag(Br,I) was synthesized by the ion‐exchange process between the silver bromide and potassium iodide, then by reducing some Ag + ions in the surface region of Ag(Br,I) particles to Ag 0 species. Ag nanoparticles are formed from Ag(Br,I) by the light‐induced chemical reduction reaction. The Ag@Ag(Br,I) particles have irregular shapes with their sizes varying from 83 nm to 1 μm. The as‐grown plasmonic photocatalyst shows strong absorption in the visible light region because of the plasmon resonance of Ag nanoparticles. The ability of this compound to reduce Cr VI under visible light was compared with those of other reference photocatalyst. The plasmonic photocatalyst is shown to be highly efficient under visible light. The stability of the photocatalyst was examined by X‐ray diffraction and X‐ray photoelectron spectroscopy. The XRD pattern and XPS spectra prove the stability of the plasmonic photocatalyst Ag@Ag(Br,I).