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Long-Term Stable Fabrication of a Nanocomposite Tm(III) Sensor Containing Nanographene/Nanosilica/RTIL/Ionophore

机译:长期稳定制备的纳米复合Tm(III)传感器,包含纳米石墨烯/纳米二氧化硅/ RTIL /离子载体

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摘要

Given the results of our previous study indicating a relatively strong interaction between2,2dianilinedisulfide (DADS) and Tm(III) ions, the ligand was incorporated as a sensing materialinto a nano-composite carbon paste electrodes composed of nanographene (NG), nanosilica (NS), anda room temperature ionic liquid namely 1-n-butyl-3-methylimidazolium tetrafluoroborate [bmim]BF4(RTIL). The electrodes made of 57% graphite, 6% NG, 15% DADS, 20% RTIL, and 2%NS were-1 found to show the optimum behavior. The sensor shows a Nernstian response (19.70.2 mV decade )-6 -2 -7in the concentration window of 1.010 -1.010 M with detection limit of 2.010 M. The responseof the sensor was found to be stable in the pH range of 4.0-8.5 and the nano-composite based Tm(III)sensors displayed very good selectivity with respect to a number of lanthanide and transition metalions. The proposed sensor displays a long life time (more than 12 weeks) with a short response time ofabout 25 s.
机译:鉴于我们先前研究的结果表明2,2,2-二苯胺二硫化物(DADS)与Tm(III)离子之间存在较强的相互作用,因此将配体作为传感材料掺入了由纳米石墨烯(NG),纳米二氧化硅(NS)组成的纳米复合碳糊电极中)和室温离子液体,即四氟硼酸1-正丁基-3-甲基咪唑鎓[bmim] BF4(RTIL)。发现由57%石墨,6%NG,15%DADS,20%RTIL和2%NS制成的电极表现出最佳性能。传感器在1.010 -1.010 M的浓度范围内显示Nernstian响应(19.70.2 mV十进制)-6 -2 -7,检测极限为2.010M。发现传感器的响应在4.0-pH范围内是稳定的8.5和基于纳米复合材料的Tm(III)传感器对许多镧系元素和过渡金属离子显示出非常好的选择性。提出的传感器显示出较长的使用寿命(超过12周),并且响应时间较短,约为25 s。

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