TY - JOUR
T1 - Selective Deposition of Silver Nanoparticles onto WO3 Nanorods with Different Facets
T2 - The Correlation of Facet-Induced Electron Transport Preference and Photocatalytic Activity
AU - Ding, Jing
AU - Chai, Yuanyuan
AU - Liu, Qianqian
AU - Liu, Xin
AU - Ren, Jia
AU - Dai, Wei Lin
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/3/3
Y1 - 2016/3/3
N2 - WO3 nanorods with a regular hexagonal morphology and different exposed facets were fabricated by hydrothermal treatment, and then Ag nanoparticles (Ag NPs) selectively deposited onto hexagonal WO3 nanorods with different facets were also successfully synthesized through an in situ photoreduction method. The prepared samples were characterized by various analytical techniques, such as X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence spectra, and so on. The results illustrated that the intrinsic nature of charge separation on the {001} facets of WO3-110 nanorods and the surface plasmon resonance (SPR) effect both contribute to the enhancement of visible-light absorption and the decrease of the recombination of the photogenerated electron-hole pairs. For comparison, Ag/WO3-110 catalysts with dominant exposed {001} facets exhibited much better photocatalytic activity than that of Ag/WO3-001 with a high percentage of exposed {100} and {010} facets for the degradation of organic pollutants (including rhodamine B, methyl orange, and so on) under the visible-light irradiation. In addition, the underlying photocatalytic reaction mechanism was further investigated by the controlled experiments using radical scavengers.
AB - WO3 nanorods with a regular hexagonal morphology and different exposed facets were fabricated by hydrothermal treatment, and then Ag nanoparticles (Ag NPs) selectively deposited onto hexagonal WO3 nanorods with different facets were also successfully synthesized through an in situ photoreduction method. The prepared samples were characterized by various analytical techniques, such as X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence spectra, and so on. The results illustrated that the intrinsic nature of charge separation on the {001} facets of WO3-110 nanorods and the surface plasmon resonance (SPR) effect both contribute to the enhancement of visible-light absorption and the decrease of the recombination of the photogenerated electron-hole pairs. For comparison, Ag/WO3-110 catalysts with dominant exposed {001} facets exhibited much better photocatalytic activity than that of Ag/WO3-001 with a high percentage of exposed {100} and {010} facets for the degradation of organic pollutants (including rhodamine B, methyl orange, and so on) under the visible-light irradiation. In addition, the underlying photocatalytic reaction mechanism was further investigated by the controlled experiments using radical scavengers.
UR - http://www.scopus.com/inward/record.url?scp=84960193662&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.5b10580
DO - 10.1021/acs.jpcc.5b10580
M3 - 文章
AN - SCOPUS:84960193662
SN - 1932-7447
VL - 120
SP - 4345
EP - 4353
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 8
ER -