Laser-induced crystallization of anodic TiO(2)nanotube layers
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In this study, crystallization of amorphous TiO(2)nanotube (TNT) layers upon optimized laser annealing is shown. The resulting anatase TNT layers do not show any signs of deformation or melting. The crystallinity of the laser annealed TNT layers was investigated using X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM). The study of the (photo-)electrochemical properties showed that the laser annealed TNT layers were more defective than conventional TNT layers annealed in a muffle oven at 400 degrees C, resulting in a higher charge recombination rate and lower photocurrent response. However, a lower overpotential for hydrogen evolution reaction was observed for the laser annealed TNT layer compared to the oven annealed TNT layer.
KeywordsTIO2 NANOTUBE ARRAYS, SENSITIZED SOLAR-CELLS, PHASE-COMPOSITION, ANATASE, WATER, TITANIUM, FILMS, PHOTORESPONSE, MORPHOLOGY, TRANSFORMATIONS
Document typePeer reviewed
Document versionFinal PDF
SourceRSC Advances. 2020, vol. 10, issue 37, p. 22137-22145.