The goal of this study was to examine an effective green synthesis of copper oxide nanoparticles (CuONPs) utilising Annona muricata leaf extract. Further, their synthesis of an optimal complex of CuONPs and graphene oxide (CuONPs@GO) nanocomposite for photocatalytic and antibacterial activity. The morphological and structural characteristics of CuONPs, CuONPs@GO complex, CuONPs@dye, CuONPs@GO@dye complex were confirmed by UV–Vis spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscope-energy dispersive X-ray spectroscopy, and Fourier transform-infrared spectroscopy. The XRD showed that the size of synthesized CuONPs, and CuONPs@GO nanocomposites are face-centred cubic crystalline with 40 nm and were nearly spherical in shape. The photocatalytic activity of CuONPs and CuONPs@GO was measured using the photodegradation of methylene blue in the presence of sunlight. The result depicts around 95% decolorization efficiency at 150 min by CuONPs@GO compared to CuONPs as such. In addition, the assessment of antibacterial activity of CuONPs and CuONPs@GO towards both Staphylococcus aureus and Salmonella typhi showed a significant zone of inhibition. The results concluded that the green synthesized CuONPs@GO acts more promisingly as a perfect photocatalyst and antibacterial agent when it is enhanced with GO.

本研究的目的是研究利用番荔枝进行氧化铜纳米颗粒 (CuONPs) 的有效绿色合成叶提取物。此外，他们合成了具有光催化和抗菌活性的 CuONPs 和氧化石墨烯 (CuONPs@GO) 纳米复合材料的最佳复合物。CuONPs、CuONPs@GO 复合物、CuONPs@dye、CuONPs@GO@dye 复合物的形态和结构特征通过紫外-可见光谱、X 射线衍射 (XRD)、场发射扫描电子显微镜-能量色散 X 射线证实光谱和傅里叶变换红外光谱。XRD 表明合成的 CuONPs 和 CuONPs@GO 纳米复合材料的尺寸为 40 nm 的面心立方晶体，形状接近球形。CuONPs 和 CuONPs@GO 的光催化活性是通过亚甲蓝在阳光下的光降解来测量的。结果表明，与 CuONPs 相比，CuONPs@GO 在 150 分钟时的脱色效率约为 95%。此外，评估 CuONPs 和 CuONPs@GO 对两者的抗菌活性金黄色葡萄球菌和伤寒沙门氏菌显示出显着的抑菌圈。结果表明，绿色合成的 CuONPs@GO 当用 GO 增强时，更有可能作为完美的光催化剂和抗菌剂。