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通过水热反应、化学镀和枝化生长三个步骤,制备了具有层级特征的异质型CuO@TiO_2纳米线膜。研究表明,CuO@TiO_2纳米线膜表现出了众多适合光电解水应用的优异物理特性,如层级表面、拓展的光学吸收范围、快速的界面电荷转移能力等。在可见光照和1.0 V偏压(相对可逆氢电极)条件下,未修饰的TiO_2纳米线膜产生的光电流密度为0.12 m A/cm2。CuO@TiO_2纳米线膜在相同条件下产生的光电流密度为0.56 m A/cm2。而且,计时电流法研究表明CuO@TiO_2纳米线膜具有良好的稳定性。因此,所制备的CuO@TiO_2纳米线膜是潜在的太阳能光电解水阳极材料。
Homogeneous CuO @ TiO_2 nanowire films with hierarchical features were prepared by hydrothermal reaction, electroless plating and branched growth. Studies have shown that the CuO @ TiO_2 nanowire films exhibit numerous excellent physical properties suitable for photoelectrolysis applications, such as hierarchical surfaces, extended optical absorption range, fast interfacial charge transfer capability, and the like. The photocurrent density of unmodified TiO 2 nanowire films was 0.12 m A / cm 2 at visible light and 1.0 V bias (relative reversible hydrogen electrode). The photocurrent density of CuO @ TiO_2 nanowire film under the same conditions was 0.56 m A / cm 2. Moreover, chronoamperometry shows that CuO @ TiO_2 nanowire films have good stability. Therefore, the prepared CuO @ TiO_2 nanowire films are potential solar photolysis water anode materials.