In this work, we report the synthesis of cuprous oxide (Cu₂O) nanoparticles modified vertically oriented aligned titanium dioxide (TiO₂) nanotube arrays through wet chemical treatment of TiO₂ nanotubes and their multi-functional application as enhanced photo electrochemical and hydrogen generation. The synthesized samples were characterized by X-ray diffraction, SEM, TEM, and UV–Vis spectroscopy. The structural characterization revealed that the admixed Cu₂O nanoparticles on the TiO₂ surface did not alter its crystalline structure of vertically oriented aligned TiO₂ nanotube. The photocatalytic performance and hydrogen generation of as synthesized Cu₂O nanoparticles modified aligned TiO₂ nanotube was found to highly depend on the Cu₂O content. The optical characterizations reveal that the presence of Cu₂O nanoparticles extends its absorption into the visible region which improves the photocurrent density in comparison to pristine aligned TiO₂ nanotubes electrodes due to enhanced photoactivity and better charge separation. The optimum photocurrent density and hydrogen generation rate has been found to be 3.4 mA cm⁻² and 127.5 μmole cm⁻² h⁻¹ in 1 M Na₂SO₄ electrolyte solution under 1.5 AM solar irradiance of white light with illumination intensity of 100 mW cm⁻².

在这项工作中，我们报告了通过湿法化学处理TiO ₂纳米管，合成了垂直排列的对准的二氧化钛（TiO ₂）纳米管修饰的氧化亚铜（Cu ₂ O）纳米颗粒，及其在增强的光电化学和氢生成方面的多功能应用。合成样品通过X射线衍射，SEM，TEM和UV-Vis光谱进行表征。结构特征表明，在TiO ₂表面上混合的Cu ₂ O纳米颗粒没有改变其垂直取向的取向的TiO ₂纳米管的晶体结构。合成Cu ₂的光催化性能和产氢发现O纳米颗粒改性的取向TiO ₂纳米管高度依赖于Cu ₂ O含量。光学特征表明，与原始排列的TiO ₂纳米管电极相比，由于增强的光活性和更好的电荷分离，Cu ₂ O纳米颗粒的存在将其吸收扩展到可见光区域，从而提高了光电流密度。发现在1 M Na ₂ SO _4中的最佳光电流密度和氢气产生速率为3.4 mA cm ^-2和127.5μmolecm ^-2  h ^-1在1.5 AM的白光太阳光下的电解质溶液，光照强度为100 mW cm ^-2。