TY - JOUR
T1 - Enhanced photoelectrochemical and sensing performance of novel TiO2 arrays to H2O2 detection
AU - Yu, Lianqing
AU - Zhang, Yaping
AU - Zhi, Qianqian
AU - Wang, Qingqing
AU - Gittleson, Forrest S.
AU - Li, Jinyang
AU - Taylor, André D.
N1 - Funding Information:
The financial support for this study by National Natural Science Foundation of China (No. 21476262 ); the Technology Development Plan of Qingdao (No. 14-2-4-108-jch ); and the National Natural Science Foundation of Shandong province (No. ZR2011EMQ001 ).
PY - 2015/5
Y1 - 2015/5
N2 - Ag-decorated TiO2 nanowire arrays were facilely prepared by H2O2 corrosion of Ti and subsequent photodeposition of Ag. Array structures and photoelectric properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis absorption spectroscopy and electrochemical methods. These results show that Ag quantum dots are evenly distributed on the surface of TiO2 nanowires. With an Ag content of 0.4 at%, the electrode's photocurrent density and photoconversion efficiency obtained optimum values of 0.29 mA/cm2 and 8.55%, respectively. The enhanced photoelectrochemical properties with Ag modification can be attributed to the extended visible light absorption range and improved separation of photo-generated carriers. Additionally, the modified nanowire arrays exhibited much stronger photoelectrocatalytic reduction activity toward hydrogen peroxide in comparison with pure TiO2 arrays or previously reported Ag electrodes.
AB - Ag-decorated TiO2 nanowire arrays were facilely prepared by H2O2 corrosion of Ti and subsequent photodeposition of Ag. Array structures and photoelectric properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis absorption spectroscopy and electrochemical methods. These results show that Ag quantum dots are evenly distributed on the surface of TiO2 nanowires. With an Ag content of 0.4 at%, the electrode's photocurrent density and photoconversion efficiency obtained optimum values of 0.29 mA/cm2 and 8.55%, respectively. The enhanced photoelectrochemical properties with Ag modification can be attributed to the extended visible light absorption range and improved separation of photo-generated carriers. Additionally, the modified nanowire arrays exhibited much stronger photoelectrocatalytic reduction activity toward hydrogen peroxide in comparison with pure TiO2 arrays or previously reported Ag electrodes.
KW - Photodeposition
KW - Photoelectrochemical property
KW - Silver
KW - TiO NW arrays
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U2 - 10.1016/j.snb.2015.01.060
DO - 10.1016/j.snb.2015.01.060
M3 - Article
AN - SCOPUS:84922345247
SN - 0925-4005
VL - 211
SP - 111
EP - 115
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -