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用于生物医学和催化应用的SiO@Au-Ag纳米复合材料的环境可持续合成路线。

Environmentally sustainable route to SiO@Au-Ag nanocomposites for biomedical and catalytic applications.

作者信息

Sapkota Kanti, Chaudhary Prerna, Han Sung Soo

机构信息

School of Chemical Engineering, Yeungnam University 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea.

Department of Nano, Medical & Polymer Materials, College of Engineering, Yeungnam University 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea

出版信息

RSC Adv. 2018 Sep 5;8(55):31311-31321. doi: 10.1039/c8ra04502j.

DOI:10.1039/c8ra04502j
PMID:35548200
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9085631/
Abstract

A facile, sustainable, operationally simple and mild method for the synthesis of SiO@Au-Ag nanocomposites (NCs) using tuber extract is described and its catalytic, antibacterial and cytotoxic properties were investigated. The fabricated SiO@Au-Ag NCs were well characterized by UV-visible spectroscopy, transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), Fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) to determine the optical activity, size and morphology, elemental composition, functional groups present, crystallinity, thermal stability and chemical state respectively. The obtained SiO@Au-Ag NCs exhibited spherical shape SiO decorated with Au and Ag nanoparticles. The diameter of the SiO nanoparticles ranges from 200-246 with average 3 nm diameter of Au and Ag NPs. Synthetic utility of this protocol has been demonstrated by exploring its effective catalytic activities for the solvent-free amidation of carboxylic acid with a primary amine with excellent yields. Moreover, the synthesized nanocomposite exhibited as noticeable antibacterial effect against Gram negative and Gram positive bacteria and better bio-compatibility against human keratinocytes. Thus, additive free SiO@Au-Ag NCs display the potential for catalysis and biomedical applications.

摘要

描述了一种使用块茎提取物合成SiO@Au-Ag纳米复合材料（NCs）的简便、可持续、操作简单且温和的方法，并研究了其催化、抗菌和细胞毒性特性。通过紫外可见光谱、透射电子显微镜（TEM）、能量色散X射线（EDX）、傅里叶变换红外（FT-IR）光谱、粉末X射线衍射（XRD）、热重分析（TGA）和X射线光电子能谱（XPS）对制备的SiO@Au-Ag NCs进行了充分表征，以分别确定其光学活性、尺寸和形态、元素组成、存在的官能团、结晶度、热稳定性和化学状态。所获得的SiO@Au-Ag NCs呈现出球形的SiO，表面装饰有Au和Ag纳米颗粒。SiO纳米颗粒的直径范围为200-246，Au和Ag NPs的平均直径为3nm。通过探索其对羧酸与伯胺的无溶剂酰胺化反应的有效催化活性并获得优异产率，证明了该方法的合成实用性。此外，合成的纳米复合材料对革兰氏阴性菌和革兰氏阳性菌表现出显著的抗菌效果，对人角质形成细胞具有更好的生物相容性。因此，无添加剂的SiO@Au-Ag NCs在催化和生物医学应用方面具有潜力。

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