Electroless recovery of silver by inherently conducting polymer powders, membranes and composite materials

被引：47

作者：

Dimeska, Roza ^{[1
]}

Murray, Paul S. ^{[1
]}

Ralph, Stephen F. ^{[1
]}

Wallace, Gordon G. ^{[1
]}

机构：

[1] Univ Wollongong, Intelligent Polymer Res Inst, Osservatorio Astrofis Arcetri, Ctr Nanostructured Electromat, Wollongong, NSW 2522, Australia

来源：

POLYMER | 2006年 / 47卷 / 13期

关键词：

inherently conducting polymer; polypyrrole; silver;

D O I：

10.1016/j.polymer.2006.03.112

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A wide variety of inherently conducting polymers, including polypyrroles and polyanilines, were shown to reduce silver ion in aqueous solution, demonstrating that these materials may form the basis of a novel approach to silver recovery. The effect of varying the polymer, dopant, and underlying substrate (reticulated vitreous carbon or fabric) was investigated, as was the effect of changing the pH of the solution containing silver. Silver recovery was found to proceed more readily from solutions with near neutral pH than from solutions with strongly acidic pH, and to occur selectively from solutions containing both silver and iron. Scanning electron microscopy (SEM) showed deposits that formed on polymeric materials after prolonged exposure to concentrated silver nitrate solutions were partially crystalline in nature. XPS spectra provided support for a mechanism of silver recovery involving a redox reaction between the polymer and silver ions leading to the formation of silver metal. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：4520 / 4530

页数：11

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