Abstract To significantly improve the solar harvesting and electron transportation, Bi 2 S 3 /BiOI p-n heterojunctions were successfully formed on the surface of TiO 2 nanotube arrays (TiO 2 NTs/Bi 2 S 3 -BiOI) by a simple solvothermal method, and the morphology, composition and photoelectrochemical property of the TiO 2 NTs/Bi 2 S 3 -BiOI were investigated by adjusting the concentration ratio of sulphur/iodonium. TiO 2 NTs/Bi 2 S 3 -BiOI nanosheets and nanorods were prepared, and the self-assembled microflowers were also observed. The results indicated that flower-like TiO 2 NTs/Bi 2 S 3 -BiOI showed high visible light absorption, photocurrent density and rapid photoelectrocatalytic removal of organic dyes and Cr(VI). The growth and photocatalytic mechanism were proposed to illuminate the high photoelectrochemical performances. The excellent photoelectrochemical activities drive the TiO 2 NTs/Bi 2 S 3 /BiOI being superior environmental and energy materials in the applications of wastewater purification and solar cells.

中文翻译：

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设计 Bi2S3/BiOI pn 异质结以敏化用于高效太阳能电池和光催化剂的 TiO2 纳米管阵列光电极

摘要 为了显着改善太阳能收集和电子传输，通过简单的溶剂热方法在 TiO 2 纳米管阵列（TiO 2 NTs/Bi 2 S 3 -BiOI）表面成功形成了 Bi 2 S 3 /BiOI pn 异质结，并且通过调节硫/碘鎓的浓度比，研究了TiO 2 NTs/Bi 2 S 3 -BiOI的形貌、组成和光电化学性能。制备了TiO 2 NTs/Bi 2 S 3 -BiOI纳米片和纳米棒，并观察到自组装微花。结果表明，花状TiO 2 NTs/Bi 2 S 3 -BiOI具有较高的可见光吸收、光电流密度和快速光电催化去除有机染料和Cr(VI)的能力。提出了生长和光催化机制来阐明高光电化学性能。