期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 10, 期 5, 页码 3336-3340出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2010.2293
关键词
Titanium Oxide; Nanotubule; Nanorod; Electron Spin Resonance; Oxygen Vacancy
类别
资金
- National Research Foundation of Korea [2009-0094056] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Nanostructured titanium oxides with various morphologies were prepared through the hydrothermal treatment of TiO2 anatase, using LiOH, NaOH and KOH as a peptizing agent at 400 K for 30 hrs. The obtained samples were characterized using the scanning electron microscopy, transmission electron microscopy, X-ray diffraction, BET measurement and the electron spin resonance spectroscopy. The observed morphologies such as tubule, partially plugged nanorod and polycrystalline nanoparticles can be tailored depending on the types of alkali metal ion, Na+, K+, and Li+ used in the hydrothermal treatments. The result of the ESR studies suggested the existence of paramagnetic sites on the annealed nanostructured TiO2 samples. The ESR signals came from the single electron trapped in oxygen vacancy (SETOV) and Ti3+.
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