The deficiency of chitosan:AgNO3 polymer electrolyte incorporated with titanium dioxide filler for device fabrication and membrane separation technology
The deficiency of chitosan:AgNO3 polymer electrolyte incorporated with titanium dioxide filler for device fabrication and membrane separation technology
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DOI：
10.1016/j.jmrt.2020.02.097
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发表时间：
2020-05-01
影响因子：
6.4
通讯作者：
Ghareeb, Hewa O.
中科院分区：
文献类型：
--
作者：
Aziz, Shujahadeen B.;Karim, Wrya O.;Ghareeb, Hewa O.
讨论了TiO 2填料介导的壳聚糖：AgNt在聚合物电解质制备和膜分离技术中存在的问题。利用UV-vis、XRD、SEM、EDX、OM和TEM等技术对银离子还原为金属银粒子的现象进行了解释。紫外-可见吸收光谱中表面等离子体共振（SPR）峰的强度和宽度的增加揭示了大量银纳米颗粒（Ag NPs）的形成。高介电常数的TiO 2填料是负责还原更多的银离子。XRD图谱中的结晶峰证实了金属银颗粒的形成。OM图像显示具有体积尺寸的Ag NP。SEM图像和EDX光谱证实了Ag NPs的存在。TEM图像显示CS：AgNt系统中存在尺寸较小的银颗粒。为了研究银离子的稳定性，进行了电性能。在高浓度TiO 2下电阻增加和介电常数降低证实了所制备的薄膜用于电化学器件应用的不足。电模量谱的虚部（M-1）出现明显的峰，而介电损耗谱没有出现峰。(C)2020年，任作家。由爱思唯尔公司出版。这是一篇开放获取的文章，获得了CC BY-NC-ND许可证（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
In the present work the drawbacks of chitosan:AgNO3(CS:AgNt) mediated by TiO2 filler for polymer electrolyte fabrication and membrane separation technology were discussed. The phenomena of reduction of silver ions to metallic silver particles were explained based on various techniques such as UV-vis, XRD, SEM, EDX, OM and TEM. An increase in intensity and broadness of surface plasmon resonance (SPR) peak in the UV-vis absorption spectra revealed the formation of a high amount of silver nanoparticles (Ag NPs). The high dielectric constant of TiO2 filler was responsible for the reduction of more silver ions. The crystalline peaks in XRD pattern confirmed the formation of metallic silver particles. The OM images showed Ag NPs with bulk sizes. The SEM images and EDX spectra confirmed the existence of Ag NPs. The TEM images illustrated silver particles with small sizes in CS:AgNt system. To investigate the stability of silver ions, the electrical properties were performed. The increase of resistance and decrease in dielectric constant at high TiO2 concentration confirmed the deficiency of the prepared films for electrochemical device application. Distinct peaks appeared in the imaginary (M-1) component of electric modulus spectra and no peaks were seen in dielectric loss spectra. (C) 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).