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首页> 外文期刊>RSC Advances >Cu2O sensitized flexible 3D-TiO2 nanotube arrays for enhancing visible photo-electrochemical performance
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Cu2O sensitized flexible 3D-TiO2 nanotube arrays for enhancing visible photo-electrochemical performance

机译：CU2O敏化柔性3D-TiO2纳米管阵列，用于增强可见光电化学性能

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摘要

Cu _(2) O flake and particle modified 3D-TiO _(2) nanotube arrays (TiO _(2) NTAs) on flexible Ti meshes were prepared by electrochemical deposition. The phase composition, microstructure and photo-electrochemical property were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-vis diffusion reflection spectroscopy (DRS) and an electrochemical system. The results indicate that 3D-TiO _(2) NTAs are covered by a large number of Cu _(2) O flakes and nanoparticles, and the flakes become longer and narrower with increasing electrochemical cycles. Cu _(2) O modified 3D-TiO _(2) NTAs expand the photo-response range from ultraviolet light to visible light. The Cu _(2) O modified NTAs with 400 pulses possess the highest visible photocurrent density of 0.9 mA cm ~(?2) , however, the Cu _(2) O modified NTAs with 600 pulses possess the largest photocatalytic activity toward degradation of methyl orange (MO) under visible-light irradiation. A mechanism is proposed to explain the difference in photocurrent response and photocatalytic activity.
机译：通过电化学沉积制备Cu _（2）o薄片和颗粒改性的3D-TiO _（2）纳米管阵列（2）百分比阵列（TiO _（2）NTA）通过电化学沉积制备。通过X射线衍射（XRD），场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM），UV-VIS扩散反射光谱（DRS）和电化学系统，表征相组合物，微观结构和光电化学性能。 。结果表明3D-TiO _（2）NTA被大量Cu _（2）°薄片和纳米颗粒覆盖，并且薄片变长，并且随着电化学循环的增加而窄。 CU _（2）O改装3D-TIO _（2）NTA将光响应范围从紫外线展开到可见光。具有400个脉冲的Cu _（2）O改性NTA具有0.9 mA cm〜（Δ2）的最高可见光电流密度，然而，具有600个脉冲的Cu _（2）o改性NTA具有最大的光催化活性朝向降解可见光照射下的甲基橙（Mo）。提出了一种机制来解释光电流响应和光催化活性的差异。

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