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首页> 外文期刊>RSC Advances >Controlled synthesis of functional Ag, Ag-Au/Au-Ag nanoparticles and their Prussian blue nanocomposites for bioanalytical applications
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Controlled synthesis of functional Ag, Ag-Au/Au-Ag nanoparticles and their Prussian blue nanocomposites for bioanalytical applications

机译：用于生物分析应用的功能Ag，Ag-Au / Au-Ag纳米粒子及其普鲁士蓝纳米复合材料的控制合成

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摘要

In this work, we report a facile approach to synthesize processable silver nanoparticles (AgNPs), bimetallic nanoparticles (Ag-Au/Au-Ag) and a decorated Prussian blue nanocomposite (PB-AgNP). The presence of cyclohexanone/formaldehyde facilitates the formation of functional AgNPs and Ag-Au/Au-Ag from 3-aminopropyltrimethoxysilane (3-APTMS) and the respective capped noble metal ions. The use of the aforementioned reducing agents (3-APTMS and cyclohexanone) also enables the synthesis of polycrystalline Prussian blue nanoparticles (PBNPs). As synthesized PBNPs, AgNPs and Au-Ag enable the formation of nano-structured composites (PB-AgNP, PB-Au-Ag) displaying better catalytic activity than that recorded with natural enzyme. The nanomaterials have been characterized by UV-vis, FT-IR and Transmission Electron Microscopy (TEM) with the following major findings: (1) 3-APTMS capped silver ions in the presence of suitable organic reducing agents [3-glycidoxypropyltrimethoxysilane (GPTMS), cyclohexanone and formaldehyde] are converted into AgNPs under ambient conditions, (2) the time course of the synthesis and dispersibility of the nanoparticles are found to be a function of the organic reducing agents, (3) the use of formaldehyde and cyclohexanone in place of GPTMS with 3-APTMS outclasses the other two in imparting better stability to amphiphilic AgNPs with reduced silanol content, (4) an increase in 3-APTMS concentrations causes a decrease in the nanogeometry of AgNPs, (5) the simultaneous synthesis of bimetallic nanoparticles under desired ratio of silver and gold cations are recorded, (6) cyclohexanone mediated synthesis of AgNPs and Ag-Au/Au-Ag enable the formation of a homogeneous nanocomposite with PBNP as a peroxidase mimetic representing a potential substitute of peroxidase enzyme. The peroxidase mimetic ability has been found to vary as a function of the 3-APTMS concentration, revealing the potential role of functional silver nanoparticles in bioanalytical applications.
机译：在这项工作中，我们报告了合成可加工银纳米颗粒（AgNP），双金属纳米颗粒（Ag-Au / Au-Ag）和装饰普鲁士蓝纳米复合材料（PB-AGNP）的容易的方法。环己酮/甲醛的存在促进了来自3-氨基丙基三甲氧基硅烷（3-APTMS）和相应封端的贵金属离子的功能性AgNP和Ag-Au / Au-Ag的形成。使用上述还原剂（3-APTMS和环己酮）也能够合成多晶普鲁士蓝纳米颗粒（PBNP）。作为合成的PBNP，AgNP和Au-Ag能够形成纳米结构复合材料（PB-AGNP，PB-AU-AG），其显示比用天然酶记录的更好的催化活性。纳米材料的特征在于通过UV-Vis，FT-IR和透射电子显微镜（TEM），具有以下主要发现：（1）在合适的有机还原剂存在下的3-APTMS封端的银离子[3-丙酸氧基丙基三甲氧基硅烷（GPTMS） ，环己酮和甲醛]在环境条件下转化为AgNP，（2）发现纳米颗粒的合成和分散性的时间过程是有机还原剂的函数，（3）使用甲醛和环己酮到位的使用具有3-APTMS的GPTM与另外两个赋予与硅烷醇含量的更好的稳定性稳定，（4）3-APTMS浓度的增加导致AgNPS的纳米曲线的增加，（5）同时合成双金属纳米粒子记录了所需的银和金阳离子的比例，（6）环己酮介导的AgNP和Ag-Au / Au-Ag的合成使得形成具有PBNP的均匀纳米复合材料作为过氧化物酶模拟物，其代表过氧化物酶的潜在替代品。已经发现过氧化物酶模拟能力随着3-APTMS浓度的函数而变化，揭示了功能性银纳米颗粒在生物分析应用中的潜在作用。

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  • 来源
    《RSC Advances》 |2015年第61期|共9页
  • 作者

    Pandey Prem. C.; Singh Richa; Pandey Yashashwa;

  • 作者单位

    Banaras Hindu Univ Indian Inst Technol Dept Chem Varanasi 221005 Uttar Pradesh India;

    Banaras Hindu Univ Indian Inst Technol Dept Chem Varanasi 221005 Uttar Pradesh India;

    Banaras Hindu Univ Indian Inst Technol Dept Chem Varanasi 221005 Uttar Pradesh India;

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  • 正文语种 eng
  • 中图分类 化学;
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