| Summary: | 碩士 === 中原大學 === 化學研究所 === 98 === Highly-ordered TiO2 nanotube arrays (TNA) by anodizing Ti foil were carried out using a slightly modified electrochemical process. The parameters such as anodization potentials and duration have been varied in order to fabricate the specific length and diameter of TNA. The performance of hydrogen production from photoelectrocatalytic effect of larger diameter TNA is found to be higher than the smaller diameter TNA.
One-Dimensional B-doped, N-doped nanotubes arrays were synthesized via an anodization process. The prepared materials were characterized with field emission scanning electron microscope, and their structures were analyzed by using x-ray diffraction (XRD). A shift of the absorption edge toward the visible region of the UV-vis absorption was be observed. Under ultraviolet (UV) or visible light irradiation, the photocurrent conversion efficiency were enhanced in the TiO2 nanotubes which doped N and B.
Under AM1.5 Standard light, the best photocurrent is N-doped TNA (0.303mA/cm2) , N-doped conversion efficiency is 1.07%, under the UV light the best of hydrogen production rate of these doped TiO2 nanotubes was 0.579 ml/h．cm2 , and under Mercury lamp was 0.826 ml/h．cm2.The Pt nanoparticles were synthesized on the TNA by microwave process at 700W for 120s. The particle size of Pt 2 nm to 5 nm. The experimental results show that the photocatalysis potency of Pt nanoparticles added TNA was batter than TNA blank.
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