The synthesis, characterization, and photocatalytic activity of ZnO/Bi 2 Sn 2 O 7 nanocomposite are reported herein. ZnO/Bi 2 Sn 2 O 7 was synthesized using a green high-speed stirring (HSS)-assisted method in the n -hexane–water system using Cassia alata leaf extract (CLE). ZnO/Bi 2 Sn 2 O 7 nanocomposite formed at the interface between n -hexane and water owing to the essential role of CLE secondary metabolites. Various analytical techniques were applied to characterize the optical, structural, and morphological properties as well as particle size of the nanocomposite. The ZnO/Bi 2 Sn 2 O 7 nanocomposite with average particle size of 9.8 nm exhibited efficiency of 86.59% for degradation of rhodamine B within 120 min. This high visible-light-driven photocatalytic activity was obtained by modification of ZnO with Bi 2 Sn 2 O 7 , resulting in a decrease of the bandgap energy from 3.12 eV to 2.80 eV. This research offers a novel method for efficient synthesis of nanocomposites with high photocatalytic activity.

中文翻译：

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正己烷-水的两相合成、ZnO/Bi2Sn2O7 纳米复合材料的表征和光催化活性

本文报道了ZnO/Bi 2 Sn 2 O 7 纳米复合材料的合成、表征和光催化活性。ZnO/Bi 2 Sn 2 O 7 使用绿色高速搅拌（HSS）辅助方法在正己烷-水系统中使用决明子叶提取物（CLE）合成。由于 CLE 次生代谢物的重要作用，ZnO/Bi 2 Sn 2 O 7 纳米复合材料在正己烷和水之间的界面处形成。应用各种分析技术来表征纳米复合材料的光学、结构和形态特性以及粒径。平均粒径为9.8 nm的ZnO/Bi 2 Sn 2 O 7 纳米复合材料在120分钟内降解罗丹明B的效率为86.59%。这种高可见光驱动的光催化活性是通过用 Bi 2 Sn 2 O 7 修饰 ZnO 获得的，导致带隙能量从 3.12 eV 降低到 2.80 eV。该研究为高效合成具有高光催化活性的纳米复合材料提供了一种新方法。