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Synthesis and Study of Plasmon‐Induced Carrier Behavior at Ag/TiO 2 Nanowires
Author(s) -
Li Haiyan,
Lu Wenbo,
Tian Jingqi,
Luo Yonglan,
Asiri Abdullah M.,
AlYoubi Abdulrahman O.,
Sun Xuping
Publication year - 2012
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.201103523
Subject(s) - surface plasmon resonance , photocurrent , photocatalysis , materials science , nanocomposite , nanowire , visible spectrum , methylene blue , plasmon , absorption (acoustics) , charge carrier , nanoparticle , photochemistry , nanotechnology , chemical engineering , ion , optoelectronics , chemistry , catalysis , composite material , biochemistry , engineering , organic chemistry
Abstract Nanocomposites of Ag/TiO 2 nanowires with enhanced photoelectrochemical performance have been prepared by a facile solvothermal synthesis of TiO 2 nanowires and subsequent photoreduction of Ag + ions to Ag nanoparticles (AgNPs) on the TiO 2 nanowires. The as‐prepared nanocomposites exhibited significantly improved cathodic photocurrent responses under visible‐light illumination, which is attributed to the local electric field enhancement of plasmon resonance effect near the TiO 2 surface rather than by the direct transfer of charge between the two materials. The visible‐light‐driven photocatalytic performance of these nanocomposites in the degradation of methylene blue dye was also studied, and the observed improvement in photocatalytic activity is associated with the extended light absorption range and efficient charge separation due to surface plasmon resonance effect of AgNPs.