Zhang Zhonghai, Yuan Yuan, Shi Guoyue, Fang Yanju, Liang Linhong, Ding Hongchun, Jin Litong
Department of Chemistry, East China Normal University, Shanghai 200062, China.
Environ Sci Technol. 2007 Sep 1;41(17):6259-63. doi: 10.1021/es070212x.
A highly ordered titanium dioxide nanotube arrays (HOTDNA) electrode was prepared in hydrofluoric acid solution by electrochemical anodization technique on a pure titanium sheet. The HOTDNA electrode was characterized by FE-SEM microscopy, X-ray diffraction, and UV-vis spectra. The linear-sweep photovoltammetry response on the HOTDNA electrode is presented in this work. The photogenerated current of 0.3 mA/cm2 was observed significantly upon illumination with applied potential of 0.5 V in the UV regions at the central wavelength of 253.7 nm. Photoelectrocatalytic (PEC) and photocatalytic (PC) activities of the HOTDNA electrode were evaluated in the degradation of methyl orange (MeO) in aqueous solution. A set of optimized conditions such as anodic potential, calcinations temperature, and MeO concentration on the PEC activity was investigated. The PEC and PC activities of HOTDNA electrode were compared. We concluded that the HOTDNA electrode was an effective photoelectrode for achieving an enhanced MeO degradation.
通过电化学阳极氧化技术，在氢氟酸溶液中于纯钛片上制备了一种高度有序的二氧化钛纳米管阵列（HOTDNA）电极。采用场发射扫描电子显微镜（FE-SEM）、X射线衍射和紫外可见光谱对HOTDNA电极进行了表征。本文展示了HOTDNA电极上的线性扫描光伏安响应。在中心波长为253.7 nm的紫外区域，当施加0.5 V的电势并光照时，显著观察到光生电流为0.3 mA/cm²。在水溶液中甲基橙（MeO）的降解过程中评估了HOTDNA电极的光电催化（PEC）和光催化（PC）活性。研究了诸如阳极电势、煅烧温度和MeO浓度等一组对PEC活性的优化条件。比较了HOTDNA电极的PEC和PC活性。我们得出结论，HOTDNA电极是实现增强的MeO降解的有效光电极。
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