| Summary: | 碩士 === 國立虎尾科技大學 === 材料科學與綠色能源工程研究所 === 99 === There are three parts in this study. Firstly, we report the preparation of titania nanotube by potentiostatic anodizing process. Titania Nanotube are manufactured by anodization with electrolyte of mixture of Dimethyl sulfoxide (DMSO), phosphoric acid (H3PO4) and hydrofluoric acid (HF), titanium foil as anode and platinum as cathode at different anodizing potential under constant temperature and concentration conditions. From the XRD diffraction pattern, the amorphous nanotube was crystalled into anatase phase after heat treatment at 450oC for 6 h. FESEM photographs show the morphology structure of TiO2 nanotube. The nanotubes with a pore diameter range from 15 to 50 nm.
Secondly, the electro-optic transfer efficiency of TiO2 nanotube with different pore size was evaluated after photocurrent measurement conducted under UV radiation. Furthermore, the photocatalytic degradation of dyeing agent for both acid orange 7 (AO7) at 10 ppm concentrations by the TiO2 nanotube with different pore size were carried out under 400W UV radiation for 2hr respectively. Spectrophotometer confirmed that concentration were greatly reduced.
Third, use prepared electrodes under pH 2, 4,7,10 the standard solution to test for different concentrations of hydrogen ions (pH value) of the potential sensing performance. The prepared sensors have good sensitivity and response time of the induced effects. Experimental results show that the TiO2 nanotube were suitable for Photocatalysts applications and pH sensor.
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