양극산화 조건에 따른 이산화티타늄 나노튜브의 광촉매 및 광전기화학적 특성

초록

Nanosized TiO2 has been widely investigated in photoelectrochemical or photocatalytic applications due to their intrinsic properties such as suitable band position, high photocorrosion resistance, and surface area. In this study, to achieve the high efficiency in photoelectrochemical and photocatalytic performance, TiO2 nanotubular structures were formed by anodization at various temperatures and times. The morphological and crystal structure of the anodized TiO2 nanotubes (NTs) were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The photoelectrochemical (PEC) properties and incident photon-to-current conversion efficiency (IPCE) of the TiO2 NTs were studied with different lengths and morphologies. From the detailed investigations, the optimum thickness of TiO2 nanotubes was 3 ㎛. Moreover, we found that the optimum photocatalytic pollutant removal efficiency of TiO2 nanotubes for photodegradation of Rhodamine B (RhB) under simulated solar light was 5.34 μm of tube length.

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