Systematic green synthesis of silver oxide nanoparticles for antimicrobial activity
Systematic green synthesis of silver oxide nanoparticles for antimicrobial activity
复制标题
DOI：
10.1016/j.envres.2021.111627
复制
发表时间：
2021-07-13
影响因子：
8.3
通讯作者：
Kaviyarasu, K.
中科院分区：
文献类型：
--
作者：
Mani, M.;Harikrishnan, R.;Kaviyarasu, K.
在本研究中，我们利用白花牡丹叶提取物（CG）中存在的生物活性剂，通过绿色合成成功合成了纳米结构银颗粒（NS-AgPs）。当在含有生物化合物的CG叶绿色提取物中添加硝酸银（AgNO3）溶液时，由于纳米结构银颗粒（NS-AgPs）的存在，混合物从黄色变成红棕色，随后使用紫外仪器获得紫外可见光谱（UV-vis）光谱以确认水溶液（合成样品）中存在纳米结构银颗粒（NS-AgPs）。为了确认 NS-AgP 中现有的官能团，本研究进行了傅里叶变换红外光谱 (FTIR) 研究。电子通过粉末状 NS-AgPs 样品的波状扫描和隧道效应分别给出扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 图像，用于找出 NS-AgPs 的二维尺寸和形状分布。进一步的动态光散射 (DLS) 和 zeta 电位研究分别用于确认 NS-AgP 的尺寸和良好的稳定性。很明显，NS-AgPs 对微生物表现出很强的毒性活性，为了证实这一机制，进行了抗菌（针对大肠杆菌和金黄色葡萄球菌）研究。
In this present research, we succeeded in synthesizing nanostructured silver particles (NS-AgPs) using bio active agent present in the leaf extracts of Cleome gynandra (CG) under green synthesis. While adding silver nitrate (AgNO3) solution in green extracts of CG leaf containing bio compound, the mixture turns from yellow to reddish brown, as a consequence of existence of nanostructured silver particles (NS-AgPs) and later UV instrument is used to obtain the Ultraviolet visible spectroscopy (UV-vis) spectra to confirm existing nanostructured silver particles (NS-AgPs) in aqueous solutions (synthesized sample). To confirm existing functional groups in NS-AgPs, the fourier transform infrared spectroscopy (FTIR) study is carried throughout this research. The scanning and tunneling of wave like nature of electrons passing through powdered NS-AgPs sample gives Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) images respectively, which are carried out to find out the 2-dimensional size and shape distribution of NS-AgPs. Further dynamic light scattering (DLS) and zeta potential studies are used to confirm the size and good stability of NS-AgPs respectively. It is evident that NS-AgPs exhibits a strong toxic activity against microorganism and to confirm this mechanism the antibacterial (against Escherichia coli and Staphylococcus aureus) study is carried out.