Abstract

The present work describes the aloe-vera, as a green agent for the facile synthesis of copper oxide NPs and their deliberation for antibacterial and photocatalytic activities. The synthesis has been carried out at pH 11.5 and 70 °C with detailed characterization investigation through UV-spectroscopy, XRD (X-ray Diffraction), SEM (Scanning electron microscope), EDX (Energy-dispersive X-ray spectroscopy) and TEM (Transmission electron microscope) techniques. The study reveals the altered morphology of CuO NPs with a change in concentration of precursor. After characterization, CuO NPs with size 5–20 nm have been examined against pathogenic bacteria like Bacillus subtilis, Staphylococcus aureus, and Escherichia coli to calculate the zone of inhibition, MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentration). Photo-catalytic degradation has been performed in the presence of H₂O₂, which results in the degradation of MO (methyl orange) dye up to 96% in 24 min under exposure of UV light.

摘要

目前的工作描述了芦荟作为一种绿色试剂，用于轻松合成氧化铜 NPs 及其抗菌和光催化活性的研究。该合成在 pH 11.5 和 70 °C 下进行，并通过紫外光谱、XRD（X 射线衍射）、SEM（扫描电子显微镜）、EDX（能量色散 X 射线光谱）和 TEM（透射电子显微镜）技术。该研究揭示了随着前体浓度的变化，CuO NPs 的形态发生了变化。表征后，大小为 5-20 nm 的 CuO NPs 已被检测对病原菌，如枯草芽孢杆菌、金黄色葡萄球菌和大肠杆菌计算抑菌圈、MIC（最低抑菌浓度）和 MBC（最低杀菌浓度）。在 H ₂ O ₂存在下进行了光催化降解，这导致在紫外线照射下 24 分钟内将 MO（甲基橙）染料降解高达 96%。