Abstract

The possibility is studied of electrochemical synthesis of a nanocomposite of polymer/silver nanoparticles. The composite was formed in two stages including synthesis of a polymethylolacrylamide film by electropolymerization and the further immobilization of silver nanoparticles in a polymer matrix using the method of electrochemical reduction of metal ions to Ag⁰ in a film impregnated by AgNO₃ solution. Physical, chemical, electrochemical, and catalytic characteristics of hybrid materials are studied. The presence of Ag⁰ in the polymer is confirmed both visually and using the methods of X-ray phase analysis, plasmon resonance, scanning electron microscopy, energy–dispersive and atomic absorption analysis. The optimum modes of electrochemical immobilization of Ag⁰ nanoparticles in the polymer are determined. The effect of the potential sweep rate, number of cycles and AgNO₃ concentration on the completeness of reduction of Ag⁺ and amount of silver immobilized in the composite is studied. It is found that electroreduction of Ag⁺ to Ag⁰ occurs predominantly in the first cycle. The method of small–angle X-ray scattering is used to obtain the functions of silver particle distribution by radii. It is established that the average diameter of Ag nanoparticles is about 20 nm. It is found that polymer methylolacrylamide films containing silver nanoparticles manifest electrocatalytic activity towards hydrogen peroxide.

中文翻译：

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银纳米颗粒在聚甲基丙烯酸铝基质中的电化学固定

摘要

研究了电化学合成聚合物/银纳米颗粒的纳米复合材料的可能性。所述复合物分两个阶段形成，包括通过电聚合合成聚羟甲基丙烯酰胺膜，以及使用在由AgNO ₃溶液浸渍的膜中将金属离子电化学还原为Ag ⁰的方法，将银纳米颗粒进一步固定在聚合物基质中。研究了杂化材料的物理，化学，电化学和催化特性。Ag ⁰的存在可以通过X射线相分析，等离振子共振，扫描电子显微镜，能量色散和原子吸收分析等方法目测和确认聚合物中的杂质。确定了将Ag ⁰纳米颗粒电化学固定在聚合物中的最佳方式。研究了电势扫描速率，循环次数和AgNO ₃浓度对复合材料中Ag ⁺还原完成和固定化银量的影响。发现将Ag ⁺电还原为Ag ⁰主要发生在第一个周期。小角度X射线散射法用于获得半径分布的银颗粒分布函数。已确定Ag纳米颗粒的平均直径为约20nm。发现含有银纳米颗粒的聚合物羟甲基丙烯酰胺膜表现出对过氧化氢的电催化活性。