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首页> 外文期刊>International Journal of Electrochemical Science >Preparation of Phosphate Ion-Selective Membrane Based on Silver Salts Mixed with PTFE or Carbon Nanotubes
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Preparation of Phosphate Ion-Selective Membrane Based on Silver Salts Mixed with PTFE or Carbon Nanotubes

机译：银盐与聚四氟乙烯或碳纳米管混合制备磷酸根离子选择膜

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摘要

A sensitive phosphate sensor has been prepared by constructing a solid membrane disk consisting of variable mixtures of silver phosphate, silver sulfide, and PTFE (Type 1 membrane) or silver phosphate, silver sulfide and nanotube (Type 2 membrane). The ternary membranes exhibit greater selectivity over the wide range of concentration. The membrane with the composition of 50.00% PTFE; 41.66% Ag3PO4 and 8.33% Ag2S was selected as our preferred membrane. The membranes exhibited linear potential response in the concentration range of 1×10–1 to 1×10–5 M. Their detection limit is about 5×10–6 M. The membranes have a long lifetime and can be stored in air when they are not in use. The best performance for nanocomposite sensor was obtained with membrane of the following composition: 78.00% Ag3PO4; 20.00% Ag2S, and 2.00% carbon nanoparticles. The membrane had a 2- -1 -5 slope of 32.6 mV toward HPO4 ions in the range between 1×10 and 1×10 M with a detection limit of 5.45×10–6 M. The proposed sensors were found to be applicable over a pH range between 3 and 7.
机译：通过构造由磷酸银，硫化银和PTFE（类型1膜）或磷酸银，硫化银和纳米管（类型2膜）的可变混合物组成的固体膜盘，已经制备了敏感的磷酸盐传感器。三元膜在宽浓度范围内显示出更高的选择性。该膜的成分为50.00％PTFE;选择41.66％Ag3PO4和8.33％Ag2S作为我们的首选膜。膜在1×10–1至1×10–5 M的浓度范围内表现出线性电势响应。它们的检测极限约为5×10–6M。膜具有较长的使用寿命，当将其存储在空气中时没有使用。用以下组成的膜可获得纳米复合传感器的最佳性能：78.00％Ag3PO4; 20.00％的Ag2S和2.00％的碳纳米颗粒。该膜对HPO4离子的2- -1 -5斜率为32.6 mV，范围为1×10到1×10 M，检出限为5.45×10-6M。 pH范围在3到7之间。

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