Abstract Herein, an electrochemical approach was developed for the rapid and selective determination of hydrazine using 5% polyaniline (PANI)-doped mesoporous SrTiO3 nanocomposite modified glassy carbon electrode (GCE). The nanocomposite was synthesized by a modified sol-gel procedure using F127 structure mediator agent to obtain mesoporous SrTiO3 followed by an ultra-sonication technique to produce the final PANI doped SrTiO3. Various characterization tools, namely, XRD, XPS, FE-SEM and HR-TEM confirmed the successful formation of the nanocomposite and revealed cubic perovskite structure with d-spacing value 2.70 A for mesoporous SrTiO3. Cyclic voltammetry and electrochemical impedance spectroscopy measurements exhibited higher electrocatalytic performance of the PANI/SrTiO3 nanocomposite compared to either pure SrTiO3 or unmodified GCE. The hydrazine oxidation reaction follows the first-order diffusion-controlled kinetics with a transfer coefficient value 0.65 obtained from Tafel plot analysis. Linear sweep voltammetry (LSV) and amperometric (i-t) techniques revealed that the PANI/SrTiO3 nanocomposite modified GCE exhibited remarkable sensitivity; 0.2128 μAμM−1 cm−2 over the concentration range 0.2–3.56 mM (LSV) and 0.2438 μAμM−1 cm−2 over the concentration range 16–58 μM (amperometry) with a rapid response time

中文翻译：

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基于PANI掺杂介孔SrTiO3纳米复合修饰玻碳电极的高效肼电化学传感器

摘要 在此，开发了一种使用 5% 聚苯胺 (PANI) 掺杂的介孔 SrTiO3 纳米复合材料修饰的玻碳电极 (GCE) 快速和选择性测定肼的电化学方法。纳米复合材料是通过改进的溶胶-凝胶程序合成的，使用 F127 结构介体剂获得介孔 SrTiO3，然后采用超声技术制备最终的 PANI 掺杂的 SrTiO3。各种表征工具，即 XRD、XPS、FE-SEM 和 HR-TEM 证实了纳米复合材料的成功形成，并揭示了介孔 SrTiO3 d-间距值为 2.70 A 的立方钙钛矿结构。与纯 SrTiO3 或未改性的 GCE 相比，循环伏安法和电化学阻抗谱测量表明 PANI/SrTiO3 纳米复合材料具有更高的电催化性能。肼氧化反应遵循一级扩散控制动力学，从塔菲尔图分析获得的传递系数值为 0.65。线性扫描伏安法 (LSV) 和电流法 (it) 技术表明，PANI/SrTiO3 纳米复合材料修饰的 GCE 表现出显着的灵敏度；0.2128 μAμM−1 cm−2 在 0.2–3.56 mM (LSV) 浓度范围内和 0.2438 μAμM−1 cm−2 在 16–58 μM 浓度范围内（电流分析法），具有快速响应时间