Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7717471 | International Journal of Hydrogen Energy | 2015 | 7 Pages |
Abstract
TiO2 nanoparticles (NPs) were deposited on Ti foil by fs-PLD at room temperature under different chamber pressure from high vacuum (â¼10â6Â mbar) to oxygen pressure (0.1Â mbar, 1Â mbar). The present work focuses on investigating the effects of deposition conditions on crystalline phase, morphology and photoelectrochemical properties of the resulting TiO2 NPs-assembled films electrode. The results show that the morphology of the sample obtained in 1Â mbar shows the sparser nanoagglomerates than that of TiO2 NPs deposited under vacuum or in 0.1Â mbar. Moreover, TiO2 NPs films with pure rutile phase and the thickness of less than 400Â nm exhibited the higher photocurrent densities and the greater charge carrier densities. Combined with the analysis of the photovoltage, it can be deduced that the optimal deposition condition for better PEC performance of TiO2 NPs films produced by fs-PLD is the higher chamber pressure (1Â mbar) and longer deposition time (3Â h).
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Lixia Sang, Hongjie Zhang, Xiaochang Ni, K.K. Anoop, Rosalba Fittipaldi, Xuan Wang, Salvatore Amoruso,