Preparation of TiO2 Nanotubes by Anodization Process and Its Application on Photocatalytic Degradation of Acid Red 4 in Aqueous Solution

• Main Authors: Yi-Chun Liao, 廖倚均
• Other Authors: Young Ku
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/k3ma85

碩士 === 國立臺灣科技大學 === 化學工程系 === 99 === Fabrication of TiO2 nanotube arrays (TNTs) by anodization process in ethylene electrolytes containing NH4F with various duration, and prepared TiO2 nanotube arrays annealed at different temperatures and loaded with Cu, Pt or Pt/Cu nanoparticles. Properties of prepared TiO2 nanotube arrays were analyzed by many analyzer such as field-emission scanning electron microscope analysis (FE-SEM), energy dispersive spectroscope (EDS), transmission electron microscope (TEM), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscope analysis (XPS), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and potentiostat/galvanostat. Experimental results revealed that the length of TiO2 nanotube arrays increased with increasing anodization time, but growth rate was slow down because chemical dissolution rate become more dominant. Moreover, when length of TiO2 nanotube arrays increased continuously, the tube will tend to tilt and rupture. The result will affect the degradation efficiency of acid red 4 (AR4). With increasing annealed temperature of TiO2 nanotube arrays, the content of anatase phase increased. The experiment indicated photocatalytic activity increasing with increase the content of anatase phase. Moreover, TiO2 nanotube arrays loaded with Cu nanoparticles has the best efficiency than Pt/TNTs on absorbed AR4 and degraded AR4. These results indicated that the morphology of TiO2 nanotube arrays will affect photocatalytic activity and Cu/TNTs is adsorption on treatment of AR4.