| Summary: | 碩士 === 東海大學 === 環境科學與工程學系 === 98 === In the present study, a modified sol-gel method was used to synthesize transition metal-doped titania nanoparticles which served as a raw material for the preparation of metal-doped Titania nanotube(TNT) via a temperature-controlled microwave process. The TNTs were characterized with SEM, TEM, XRD, BET surface area analyzer, UV-Vis spectroscopy, XAS and tested by photodegradatoin of methyl blue in water.
SEM and TEM micrographs showed that the TNTs have a length of a few hundred nanometers with a diameter of 8-10 nm. The TNTs are hollow and open-ended. The TNTs exist in anatase form as shown by the results from both x-ray diffraction (XRD) and x-ray absorption spectroscopy (XAS). The BET surface area of the TNTs is in the range of 134-230 m2/g. The metal-doped TNT showed a red-shift in UV-Vis absorption, as compared with the pure TNT and titania nanopowders. Under blue light illumination for 24 hours, the greatest photocatalytic activity effected by 0.1% Cu doped TNT ( Cu/Ti atomic ratio of 0.1% ).
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