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首页> 外文期刊>American Journal of Analytical Chemistry >Carbon Nanotubes as Nanosensor for Differential Electrolytic Micropotentiometry
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Carbon Nanotubes as Nanosensor for Differential Electrolytic Micropotentiometry

机译：碳纳米管作为用于差分电解微电位计的纳米传感器

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Carbon nanotubes as nanosensor were synthesized on the surface of the silver electrode using floating catalyst chemical vapor deposition reactor. Acetylene gas was used as a carbon source, ferrocene as a source of the iron nanocatalyst and hydrogen as a carrier and an activate agent. Several runs were performed to find the optimum conditions that produce sensitive Ag-CNTs electrodes. The electrodes obtained at each run were characterized by SEM. The optimum conditions that produce sensitive Ag-CNTs were found to be at a reaction time of 15 minutes, reaction temperature of 700°C, hydrogen flow rate of 25 ml/min and an acetylene flow rate of 75 ml/min. These optimum conditions were confirmed from the normal behavior of the resulting Ag-CNTs electrodes in the titration of 10 μL of chloride using dc differential electrolytic potentiometry. When conditions that differ from the optimum ones were applied in the preparation of the Ag-CNTs electrodes, abnormal titration curves were obtained. The superiority of the Ag-CNTs electrodes was demonstrated by the successful applications of these electrodes as an indicating system in the micro titrations of different volumes of cyanide solution with silver nitrate reach. By applying this technique a volume of 1.2 μL sample of cyanide was successfully titrated. The normal behavior of the Ag-CNts electrodes was compared to that of the normal silver electrodes which exhibit an abnormal behavior.
机译：使用浮动催化剂化学气相沉积反应器在银电极表面合成了碳纳米管作为纳米传感器。乙炔气体用作碳源，二茂铁用作铁纳米催化剂的源，氢用作载体和活化剂。进行了几次运行以找到产生敏感的Ag-CNTs电极的最佳条件。在每次运行中获得的电极通过SEM表征。发现产生敏感的Ag-CNT的最佳条件是反应时间为15分钟，反应温度为700℃，氢气流速为25ml / min和乙炔流速为75ml / min。这些最佳条件由使用直流差动电解电位计滴定10μL氯化物时所得Ag-CNTs电极的正常行为确认。当在制备Ag-CNTs电极时使用与最佳条件不同的条件时，会获得异常的滴定曲线。 Ag-CNTs电极的优越性通过这些电极作为指示系统在硝酸银达到的不同体积的氰化物溶液的微量滴定中的成功应用而得到证明。通过应用该技术，成功滴定了1.2μL氰化物样品。将Ag-CNts电极的正常行为与表现出异常行为的正常银电极进行了比较。

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