Despite the tremendous attempts to improve the solar-to-hydrogen conversion efficiency of TiO₂ based photoelectrochemical photoanode, further progress is still needed to utilize the TiO₂ as the promising photoanode materials. Herein, a highly enhanced photoanode composed of the nanostructured In₂S₃/TiO₂ is synthesized. The photocurrent density approximately 3.5 times (2.74 mA cm⁻²) as high as the pristine TiO₂ was obtained due to the improved carrier concentration and fast charge separation. The incident photon-to-current efficiency shows a 65.8 % while pristine TiO₂ nanorods shows only 24.7 % of efficiency. Further studies on the carrier lifetime and band position were performed and clarify the generation of type-Ⅱ heterojunction between the In₂S₃ nanoparticles and TiO₂ nanorod arrays. This study proposes the methodologies and the theoretical evidence for achieving significant improvements in the TiO₂ based photoanode. Moreover, this study's all-solution-based process provides the facile and scalable method for the highly enhanced photoelectrode and allows environmentally friendly production.

尽管为提高基于TiO ₂的光电化学光阳极的太阳能转化为氢的效率进行了巨大的尝试，但仍需要进一步的发展来利用TiO ₂作为有前途的光阳极材料。在此，合成了由纳米结构的In ₂ S ₃ / TiO ₂组成的高度增强的光阳极。由于提高的载流子浓度和快速的电荷分离，获得的光电流密度约为原始TiO _2的3.5倍（2.74 mA cm ^-2）。原始TiO ₂的入射光子-电流效率为65.8％纳米棒仅显示24.7％的效率。对载流子寿命和能带位置进行了进一步研究，阐明了In ₂ S ₃纳米颗粒与TiO ₂纳米棒阵列之间Ⅱ型异质结的产生。这项研究提出了实现TiO ₂基光阳极显着改进的方法和理论证据。此外，这项基于全溶液的研究方法为高度增强的光电极提供了一种简便且可扩展的方法，并实现了环境友好的生产。