TY - JOUR
T1 - Complex Oxides Based on Silver, Bismuth and Tungsten: Syntheses, Characterization and Photoelectrochemical Behavior
AU - Longo, Claudia
AU - Tayar Galante, Miguel
AU - Fitzmorris, Robert
AU - Zhang, Jin Z.
AU - Taylor, Sarah Frances Rebecca
AU - Mohapatra, Jeotikanta
AU - Liu, Jie Ping
AU - Duarte, Luis G.T.A.
AU - Hossain, Mohammad Kabir
AU - Hardacre, Christopher
AU - Rajeshwar, Krishnan
N1 - doi: 10.1021/acs.jpcc.7b11924
PY - 2018/6/28
Y1 - 2018/6/28
N2 - Silver-containing complex oxides present interesting light absorption and electronic properties pointing to their applicability for solar fuels generation and environmental remediation. In this vein, the syntheses, characterization and photoelectrochemical properties of the Aurivillius oxide, AgBiW2O8 and a tri-phasic material: Ag/Bi2WO6/AgBiW2O8 are described herein. From UV-Vis diffuse reflectance analysis, both oxide nanoparticles exhibited intense absorption at wavelengths <455 nm, with an additional band centered at ~500 nm for the tri-phasic material, and attributed to surface plasmon resonance of the metallic Ag phase The tri-phasic material was further characterized by a variety of structural and spectroscopic probes, indicating a defect-rich crystalline structure. Voltammetric measurements were performed on thin film electrodes of both materials in the dark and under simulated solar irradiation with polarization at potentials negative of the rest potential. These measurements showed p-type semiconductor behavior, with enhanced cathodic photocurrent in the presence of electron acceptors in aqueous media.
AB - Silver-containing complex oxides present interesting light absorption and electronic properties pointing to their applicability for solar fuels generation and environmental remediation. In this vein, the syntheses, characterization and photoelectrochemical properties of the Aurivillius oxide, AgBiW2O8 and a tri-phasic material: Ag/Bi2WO6/AgBiW2O8 are described herein. From UV-Vis diffuse reflectance analysis, both oxide nanoparticles exhibited intense absorption at wavelengths <455 nm, with an additional band centered at ~500 nm for the tri-phasic material, and attributed to surface plasmon resonance of the metallic Ag phase The tri-phasic material was further characterized by a variety of structural and spectroscopic probes, indicating a defect-rich crystalline structure. Voltammetric measurements were performed on thin film electrodes of both materials in the dark and under simulated solar irradiation with polarization at potentials negative of the rest potential. These measurements showed p-type semiconductor behavior, with enhanced cathodic photocurrent in the presence of electron acceptors in aqueous media.
U2 - 10.1021/acs.jpcc.7b11924
DO - 10.1021/acs.jpcc.7b11924
M3 - Article
SN - 1932-7447
VL - 122
JO - The Journal of Physical Chemistry C
JF - The Journal of Physical Chemistry C
IS - 25
ER -
