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Synthesis of AgNPs and Ag@MoS2 nanocomposites by dracocephalum kotschyi aqueous extract and their antiacetylcholinesterase activities
Materials Technology ( IF 2.9 ) Pub Date : 2021-09-09 , DOI: 10.1080/10667857.2021.1976363
Hosna Alvandi 1 , Niloufar Dorosti 1 , Farzaneh Afshar 2
Affiliation  

ABSTRACT

Green synthesis of metal nanoparticles and nanocomposites offers numerous advantages over conventional methods. The present study deals with the synthesis of Ag nanoparticles and Ag@MoS2 nanocomposites by Dracocephalum kotschyi extract as a reductant and a stabilising agent. The influence of extract volume, reaction temperature, contact time and pH on the synthesis of d-AgNPs was investigated. Further, the modified MoS2 using D. kotschyi extract (d-MoS2) could deposit Ag+ ions onto the MoS2 nanosheets surface, reduce the ions to AgNPs, and stabilise the reduced particles effectively. The synthesised nanostructures were characterised by XRD, SEM-EDS, TEM, Zeta potential and FT-IR analysis. Ag nanoparticles are spherical with diameter of 58–75 nm for d-AgNPs and 35–55 nm for Ag@d-MoS2, respectively. The d-AgNPs exhibited high activity in the inhibition of acetylcholinesterase. Also, loading of AgNPs on MoS2 nanosheets resulted in the increase of inhibitory activity against acetylcholinesterase compared to MoS2 nanosheets.



中文翻译:

枸杞水提液合成 AgNPs 和 Ag@MoS2 纳米复合材料及其抗乙酰胆碱酯酶活性

摘要

与传统方法相比,金属纳米颗粒和纳米复合材料的绿色合成具有许多优势。本研究涉及由Dracocephalum kotschyi合成 Ag 纳米颗粒和 Ag@MoS2 纳米复合材料提取物作为还原剂和稳定剂。考察了提取量、反应温度、接触时间和pH对d-AgNPs合成的影响。此外,使用 D. kotschyi 提取物 (d-MoS2) 改性的 MoS2 可以将 Ag+ 离子沉积到 MoS2 纳米片表面,将离子还原为 AgNPs,并有效地稳定还原后的粒子。通过XRD、SEM-EDS、TEM、Zeta电位和FT-IR分析对合成的纳米结构进行了表征。Ag 纳米粒子是球形的,d-AgNPs 的直径为 58-75 nm,Ag@d-MoS2 的直径为 35-55 nm。d-AgNPs 在抑制乙酰胆碱酯酶方面表现出高活性。此外,与 MoS2 纳米片相比,在 MoS2 纳米片上负载 AgNP 导致对乙酰胆碱酯酶的抑制活性增加。

更新日期:2021-09-09
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