Abstract
ABSTRACTMultistep hydrothermal (MSH) process is employed for growth of TiO2 nanocorals onto the conducting fluorine‐doped tin oxide‐coated glass substrates. The surface morphological features and physical properties of TiO2 films were investigated by field emission scanning electron microscopy, high resolution transmission electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy, room temperature photoluminescence spectroscopy and X‐ray photoelectron spectroscopy. The surface morphology revealed the formation of TiO2 corals having nanosized (30–40 nm) polyps. The photoelectrochemical properties of the TiO2 nanocoral electrodes were investigated in 0.1 M NaOH electrolyte under ultraviolet illumination. The results presented in this study highlight two major findings: (i) tuning the photoelectrochemical response and photoconversion efficiency via controlled thickness of TiO2 nanocorals by MSH route and (ii) the substantial increase in short‐circuit photocurrent (Jsc) because of the improved charge transport through TiO2 nanocorals prepared via MSH process. Copyright © 2012 John Wiley & Sons, Ltd.
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