Abstract Green synthesis is a simple, non-toxic, economical and eco-friendly approach for the synthesis of nanoparticles. In the present work, nanoparticles of titanium dioxide (TiO2 NPs) were synthesized using an aqueous solution of Syzygium cumini leaf extract as a capping agent. These green synthesized TiO2 NPs were further evaluated for photo catalytic removal of lead from industrial wastewater. Obtained nanoparticles were characterized using: high-resolution scanning electron microscopy (HRSEM), high-resolution transmission electron microscopy (HRTEM), X-ray energy dispersive spectroscopy (EDS), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), dynamic light scattering (DLS) and Brunauer-Emmett-Teller (BET). Obtained results revealed that synthesized TiO2 NPs possess spherical morphology with anatase phase with a large BET surface area of 105 m2/g. Photo catalytic studies of TiO2 NPs for lead removal from explosive wastewater were performed in a self-designed reactor. Inductive coupled plasma spectroscopy (ICP) was used to determine the lead concentration. Obtained results witnessed 75.5% removal in chemical oxygen demand (COD) and 82.53% removal in lead (Pb2+). This application of green TiO2 NPs is being explored for the first time.

中文翻译：

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丁香提取物中TiO2纳米颗粒的绿色合成用于光催化去除爆炸性工业废水中的铅（Pb）

摘要 绿色合成是一种简单、无毒、经济、环保的纳米粒子合成方法。在目前的工作中，使用丁香叶提取物的水溶液作为封端剂合成了二氧化钛 (TiO2 NPs) 纳米颗粒。这些绿色合成的 TiO2 NPs 被进一步评估用于光催化去除工业废水中的铅。使用高分辨率扫描电子显微镜 (HRSEM)、高分辨率透射电子显微镜 (HRTEM)、X 射线能量色散光谱 (EDS)、傅里叶变换红外 (FT-IR) 光谱、X 射线衍射对获得的纳米粒子进行表征(XRD)、动态光散射 (DLS) 和 Brunauer-Emmett-Teller (BET)。获得的结果表明，合成的 TiO2 NPs 具有锐钛矿相的球形形态，具有 105 m2/g 的大 BET 表面积。在自行设计的反应器中进行了用于从爆炸性废水中去除铅的 TiO2 NPs 的光催化研究。电感耦合等离子体光谱 (ICP) 用于确定铅浓度。获得的结果见证了 75.5% 的化学需氧量 (COD) 去除率和 82.53% 的铅 (Pb2+) 去除率。首次探索绿色 TiO2 NPs 的这种应用。53% 的铅 (Pb2+) 去除率。首次探索绿色 TiO2 NPs 的这种应用。53% 的铅 (Pb2+) 去除率。首次探索绿色 TiO2 NPs 的这种应用。