In this work, polymeric inclusion membranes were fabricated to extract metals from aqueous solutions using sodium tetraphenylborate as extracting agent. The fabricated membranes showed high selectivity and reactivity towards gold. Tetraphenylborate demonstrated to be efficient as extracting agent, retaining and reducing gold on the membrane surface and generating extraction percentages higher than 90%. The effects of the working solution pH, the composition and thickness of the used membranes on the percentage of gold extracted were determined. The results showed that the studied parameters affect the percentage or time required for metal extraction. Most of the studied membranes showed high gold extraction percentage around three hours after initiating contact with the working solution. Analysis performed by cyclic voltammetry and impedance spectroscopy confirmed leaching of tetraphenylborate from the membrane to the aqueous solution. Gold reduction by tetraphenylborate was confirmed by scanning electronic microscopy and it resulted in a layer of gold nanoparticles coating the membrane surface. The presence of a Salen ligand in addition to TPB had effects on the membrane apparency and possibly on the size or structure of the gold nanoparticles.

在这项工作中，使用四苯基硼酸钠作为萃取剂，制备聚合物包合物膜以从水溶液中萃取金属。制造的膜对金显示出高选择性和反应性。四苯基硼酸盐作为萃取剂被证明是有效的，可保留和减少膜表面上的金，并产生高于 90% 的萃取率。确定了工作溶液的 pH 值、所用膜的组成和厚度对金提取百分比的影响。结果表明，研究的参数影响金属提取所需的百分比或时间。大多数研究的膜在开始与工作溶液接触后约三小时显示出高金提取百分比。通过循环伏安法和阻抗谱进行的分析证实了四苯基硼酸盐从膜浸出到水溶液中。扫描电子显微镜证实了四苯基硼酸盐对金的还原作用，并在膜表面形成一层金纳米颗粒。除了 TPB 之外，Salen 配体的存在对膜外观有影响，并可能影响金纳米粒子的大小或结构。