Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 14, Issue 47, Pages 16371-16376Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp43168h
Keywords
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Funding
- National Natural Science Foundation of China [61106059]
- Encouragement Foundation for Excellent Middle-aged and Young Scientist of Shandong Province [BS2012CL005]
- Higher Education Institutions of Shandong Province [J11LA10]
- Research Foundation of University of Jinan [XKY1127]
- [TSHW20120210]
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Anatase TiO2 nanotube arrays with rod-formed walls have been fabricated using a one-step anodic oxidation method for the first time. XRD, Raman spectroscopy, SEM, and HRTEM analysis were used for the structural characterization of the synthesized nanostructures. Their photocatalytic and field emission (FE) properties were also systematically investigated, and the experimental results indicated that the crystallization of the starting polycrystalline nanostructures turned into a better anatase phase after the annealed process. The photocatalytic properties showed that the nanostructures with optimized crystallization demonstrated faster degradation rate than the as-prepared polycrystalline counterparts, which would be caused by the improved crystallinity. Furthermore, the dependence of the FE properties on the distances between the anodes and the samples was investigated and the results revealed that the annealed samples have higher field enhancement factor beta compared to the as-prepared nanostructures. The formation mechanism of this novel rod-formed TiO2 nanotubes is also briefly discussed.
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