Zhang Junjie, Li Jing, Zhang Boxue, Ye Jianfeng, Wang Yun, Ye Xiaozhou
Department of Chemistry, College of Science, Huazhong Agricultural University Wuhan 430070 China
RSC Adv. 2018 Dec 18;8(73):42049-42059. doi: 10.1039/c8ra06504g. eCollection 2018 Dec 12.
The coupling of hematite with a three-dimensional (3D) conductive inverse opal (IO) skeleton provides an efficient route to enhance the photoelectrochemical (PEC) properties of hematite without changing its chemical composition. In this work, novel 3D antimony-doped SnO (ATO) IO/hematite heterostructures were facilely fabricated, and their PEC properties were thoroughly studied. Analysis of the morphologies and photocurrent densities of the 3D ATO IO//FeO heterostructures reveals that the high conductivity of the ATO skeleton as well as the high specific area and good light harvesting properties of the 3D IO structures greatly enhance their PEC performance. In particular, further morphology tuning by changing the diameters of the ATO IO skeletons could optimize the optical and electrical properties of the as-prepared heterostructures, demonstrating the important influence of morphology engineering on PEC performance. Moreover, after a simple Sn-doping process, the PEC properties of the as-prepared structure could be further enhanced; a photocurrent density of 1.28 mA cm at 1.23 V RHE was obtained under AM 1.5G illumination.
赤铁矿与三维（3D）导电反蛋白石（IO）骨架的耦合提供了一种在不改变其化学成分的情况下增强赤铁矿光电化学（PEC）性能的有效途径。在这项工作中，新型的3D锑掺杂SnO（ATO）IO/赤铁矿异质结构被轻松制备出来，并对其PEC性能进行了深入研究。对3D ATO IO//FeO异质结构的形貌和光电流密度分析表明，ATO骨架的高导电性以及3D IO结构的高比表面积和良好的光捕获性能极大地提高了它们的PEC性能。特别是，通过改变ATO IO骨架的直径进行进一步的形貌调控可以优化所制备异质结构的光学和电学性能，证明了形貌工程对PEC性能的重要影响。此外，经过简单的Sn掺杂过程后，所制备结构的PEC性能可以进一步提高；在AM 1.5G光照下，在1.23 V RHE时获得了1.28 mA cm的光电流密度。
