The aim of this work was to synthesize copper oxide nanoparticles (CuO NPs) utilizing heartwood aqueous extract of Suaeda maritima (L.) Dumort. The synthesis of CuO NPs using green methodology with small size and high stability paved the way to protect the environment by not involving toxic chemicals and environment-friendly methodology for pharmacological and photocatalytic applications. The aqueous areal parts extract of S. maritima (L.) Dumort was used for synthesis, characterization of CuO NPs was studied, and further its antioxidant, antibacterial, and photocatalytic activity for the removal of methylene blue was studied. The synthesized CuO NPs shows characteristic UV-visible absorption maximum at 282 nm. The FT-IR spectra shows peak at 3640 cm−1 attributed to hydrogen bonded O-H group of poly phenols, alcohols, and N-H of amide. Strong peak at 1122 cm−1 corresponds to C-OH stretch in phenols and alcohols. Peaks at 1467 cm−1 and 1585 cm−1 corresponds to C=C in aromatic compounds. Strong peak at 1749 cm−1 represents the C=O in aldehydes or in keto compounds. Several strong bonds identified in the range of 1088 to 1225 cm−1 representing C-O-C stretch vibrations. The synthesized particles were circular in shape with rough surface morphology and dispersed as clusters with size of 37 nm with metallic content of 73.8%. The synthesized CuO NPs were proved as potent antibacterial and antioxidant activities. The photocatalytic for the removal of methylene blue in aqueous solution was studied and results proved that the CuO NPs were effectively remove the dye up to 86.91% within less time of 75 min. Hence, the CuO NPs synthesized are high efficiency with less particle size and can be used as antioxidant, antibacterial agent, and also applicable for the removal of hazardous methylene blue dye from effluents and can contribute indirectly to clean up the environment. The investigation reports the eco-friendly, cost-effective method for synthesizing copper oxide nanoparticles from S. maritima extract with biomedical applications.

中文翻译：

---

Suaeda maritima (L.) Dumort 水提物介导的氧化铜纳米粒子的绿色合成、表征、抗氧化、抗菌和光催化活性

这项工作的目的是利用 Suaeda maritima (L.) Dumort 的心材水提取物合成氧化铜纳米颗粒 (CuO NPs)。使用小尺寸和高稳定性的绿色方法合成 CuO NPs 为保护环境铺平了道路，不涉及有毒化学品和用于药理和光催化应用的环境友好方法。以 S. maritima (L.) Dumort 的水性部位提取物为原料合成，研究了 CuO NPs 的表征，并进一步研究了其抗氧化、抗菌和光催化去除亚甲基蓝的活性。合成的 CuO NPs 在 282 nm 处显示出最大的特征紫外-可见吸收。FT-IR 光谱显示峰位于 3640 cm-1，归因于多酚、醇和酰胺的 NH 的氢键合 OH 基团。1122 cm-1 处的强峰对应于酚类和醇类中的 C-OH 拉伸。1467 cm-1 和 1585 cm-1 处的峰对应于芳族化合物中的 C=C。1749 cm-1 处的强峰代表醛或酮化合物中的 C=O。在 1088 到 1225 cm-1 范围内确定的几个强键代表 COC 拉伸振动。合成的颗粒呈圆形，表面粗糙，分散成团簇，大小为 37 nm，金属含量为 73.8%。合成的 CuO NPs 被证明具有有效的抗菌和抗氧化活性。研究了去除水溶液中亚甲蓝的光催化作用，结果证明 CuO NPs 在 75 分钟的时间内有效去除染料高达 86.91%。因此，合成的CuO NPs效率高，粒径小，可用作抗氧化剂、抗菌剂，也适用于去除废水中有害的亚甲基蓝染料，间接有助于净化环境。该调查报告了从海藻提取物合成氧化铜纳米粒子的生态友好、经济高效的方法，具有生物医学应用。