Investigation of titania nanorod/carbon nanotube composite photocatalysts

• Main Authors: Yang, Chiachen, 楊佳珍
• Other Authors: Wei, Yulin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/84117739439463561205

碩士 === 東海大學 === 環境科學與工程學系 === 99 === In the present study, a microwave-assisted hydrothermal method was used to prepare titanium nonorods (TNRs) and TNR/multi-wall carbon nanotube （TNR/MWCNT） photocatalysts in relatively short time. The composites were characterized by Multi-Function Scanning Electron Microscope （SEM）、Transmission Electron Microsopy（TEM）、X-ray Powder Diffractometer（XRD）、BET surface area、Diffuse Reflectance UV-visible Spectrophotometer（UV-Vis spectrophotometer）、X-ray Photoelectron Spectroscopy（XPS）、X-ray Absorption Spectroscope（XAS）and their photocatalytic activities were tested by photo degradation of methyl blue in water. SEM and TEM micrographs indicated that TNRs had a length of approximately 300 nm with a diameter of about 30 nm and were non-hollowed. XPS spectra strongly indicated the existence of Ti－C bond; TNRs exited in anatase and rutile forms as shown by the results from both XRD and XAS. The BET surface area of the TNRs were 53~ 197 m2/g. TNRs showed a red-shift in UV-Vis absorption that increased with greater MWCNT addition.Under UV light illumination for 3 hours, the greatest photocatalytic activity was observed for the composite catalyst with C/Ti mole ratio of 1：1.