School of Environmental Science and Engineering, Jiangsu Key Laboratory of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Ultrason Sonochem. 2018 Mar;41:109-119. doi: 10.1016/j.ultsonch.2017.09.006. Epub 2017 Sep 7.
This contribution reports the biosynthesis of CuO NPs via ultrasound method using the Cystoseira trinodis extracts as an eco friendly and time saving process. The characterization of cupric oxide NPs was performed using XRD, FE-SEM, EDX, TEM, AFM, photoluminescence, UV-Vis, Raman and FT-IR spectroscopy investigations. SEM images show the spherical structure with the average crystallite size 6nm to 7.8nm of CuO. XRD analysis approved the formation of pure monoclinic crystallite structures of CuO NPs. These observations were confirmed by TEM analysis. The photocatalytic studies reveal the activity of the prepared CuO NPs as an efficient catalyst for the degradation of methylene blue (MB) in the presence of UV and Sunlight. CuO NPs under varying experimental parameters such as dye concentration, catalytic load, pH. The results of the in vitro biological screening effect of CuO NPs (zone of growth inhibition and minimal inhibitory concentrations) in comparison with cephalexin (as a standard compound) using the disc diffusion method was demonstrated the significant bactericidal activity against some bacteria strain including Escherichia coli (E. coli), Enterococcus faecalis (E. faecalis), Salmonella typhimurium (S. typhimurium), Staphylococcus aureus (S. aureus), Bacillus subtilis (B. subtilis), and Streptococcus faecalis (S. faecalis). Furthermore, the Nps found to inhibit the activity of 1,1-Diphenyl-2-picrylhydrazyl (DPPH) free radicals effectively. This study introduces a facile, green and low coast method for the synthesis of monoclinic CuO NPs with catalytic, antioxidant and antibacterial properties.
本研究通过超声法，利用马尾藻提取物，在环保且省时的条件下，合成氧化铜纳米粒子（CuO NPs）。采用 XRD、FE-SEM、EDX、TEM、AFM、光致发光、UV-Vis、拉曼和 FT-IR 光谱等手段对氧化铜纳米粒子的特性进行了表征。SEM 图像显示，CuO 的平均晶粒尺寸为 6nm 至 7.8nm，具有球形结构。XRD 分析证实了 CuO NPs 形成了纯单斜晶结构。TEM 分析证实了这一结果。光催化研究表明，所制备的 CuO NPs 在存在紫外光和阳光的情况下，是一种有效催化剂，可用于降解亚甲基蓝（MB）。CuO NPs 在不同的实验参数下（如染料浓度、催化负载、pH 值）的研究结果表明，与头孢氨苄（作为标准化合物）相比，CuO NPs 具有显著的抑菌活性，对一些细菌菌株（包括大肠杆菌（E. coli）、粪肠球菌（E. faecalis）、鼠伤寒沙门氏菌（S. typhimurium）、金黄色葡萄球菌（S. aureus）、枯草芽孢杆菌（B. subtilis）和粪肠球菌（S. faecalis））具有杀菌作用。此外，纳米粒子还被发现能有效抑制 1,1-二苯基-2-苦基肼基（DPPH）自由基的活性。本研究介绍了一种简便、绿色、低成本的方法，用于合成具有催化、抗氧化和抗菌性能的单斜晶 CuO NPs。
