TY - JOUR
T1 - How CdS nanoparticles can influence TiO2 nanotube arrays in solar energy applications?
AU - Qorbani, M.
AU - Naseri, N.
AU - Moradlou, O.
AU - Azimirad, R.
AU - Moshfegh, A. Z.
PY - 2015/1
Y1 - 2015/1
N2 - In this study, titanium dioxide (TiO2) nanotube array (TNA) films are fabricated via anodization of titanium (Ti) sheet. After annealing, the films consisted of well ordered, vertically oriented TNAs of 125±6nm diameter, 38±3nm wall thickness, and 2.9±0.3μm in length. Cadmium sulfide (CdS) nanoparticles are deposited on the synthesized TNAs by sequential-chemical bath deposition (S-CBD) method with different immersion cycle (n) to produce heterogeneous TNA/CdS-n (n=10, 20 and 30) nanostructures. UV-visible absorption spectra of the samples revealed that the absorption edge of CdS modified TNAs was shifted to a higher wavelength with respect to the pure TNAs indicating band gap reduction of the TNA/CdS-n. Photocurrent response of the samples was changed with n, and the maximum photocurrent density (at steady state) of 28±1mA/cm2 (or 70±2mA/W) was obtained for the TNA/CdS-20 photoanode which is about 30 times higher than one for the pure TNA under similar condition.
AB - In this study, titanium dioxide (TiO2) nanotube array (TNA) films are fabricated via anodization of titanium (Ti) sheet. After annealing, the films consisted of well ordered, vertically oriented TNAs of 125±6nm diameter, 38±3nm wall thickness, and 2.9±0.3μm in length. Cadmium sulfide (CdS) nanoparticles are deposited on the synthesized TNAs by sequential-chemical bath deposition (S-CBD) method with different immersion cycle (n) to produce heterogeneous TNA/CdS-n (n=10, 20 and 30) nanostructures. UV-visible absorption spectra of the samples revealed that the absorption edge of CdS modified TNAs was shifted to a higher wavelength with respect to the pure TNAs indicating band gap reduction of the TNA/CdS-n. Photocurrent response of the samples was changed with n, and the maximum photocurrent density (at steady state) of 28±1mA/cm2 (or 70±2mA/W) was obtained for the TNA/CdS-20 photoanode which is about 30 times higher than one for the pure TNA under similar condition.
KW - Cadmium sulfide
KW - Redox reactions
KW - TNA
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=84904480113&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2014.06.053
DO - 10.1016/j.apcatb.2014.06.053
M3 - Article
AN - SCOPUS:84904480113
SN - 0926-3373
VL - 162
SP - 210
EP - 216
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -