In the present investigation fibrous nanocomposite of reduced graphene oxide, manganese ferrite and polyaniline (RGO/MnFe₂O₄/Polyaniline) has been synthesized through a facile two-step greener approach by a solvent less thermolysis synthesis procedure. Long-chain amine is used as the solvent, reducing agent and surface functionalizing agent. Morphology and chemical functionalities of the nanocomposites are characterized using microscopic and spectroscopic measurements. Modified electrode is fabricated using the nanocomposite material and the electrochemical property of nitrite has been investigated using cyclic voltammetry measurements, an analytical method of detection of nitrite is developed using the modified electrode based on differential pulse voltammetry. Under optimum conditions, RGO/MnFe₂O₄/PANI fibrous nanocomposite based modified electrode have shown the linear dynamic range from 0.05-12000 µM with a detection limit of 0.015 µM for the detection of nitrite. The nanocomposite modified electrode showed good anti-interference ability against various common metal ions and some organic interfering agents. The nanocomposite modified electrodeis applied to determine the nitrite level in tap water. The indicative performance of the RGO/MnFe₂O₄/PANI fibrous nanocomposite modified electrode widens the scope of applications of RGO/MnFe₂O₄/PANI fibrous nanocomposite materials for on-site monitoring of nitrite.

在本研究中，还原性氧化石墨烯，锰铁氧体和聚苯胺（RGO / MnFe ₂ O ₄（Polyaniline）/聚苯胺）是通过一种无溶剂的热分解合成程序通过一种简便的两步绿色方法合成的。长链胺用作溶剂，还原剂和表面官能化剂。纳米复合材料的形貌和化学功能通过显微镜和光谱测量来表征。利用纳米复合材料制备了修饰电极，并通过循环伏安法研究了亚硝酸盐的电化学性质，开发了基于差分脉冲伏安法的修饰电极检测亚硝酸根的分析方法。在最佳条件下，RGO / MnFe ₂ O ₄/ PANI纤维纳米复合材料修饰电极的线性动态范围为0.05-12000 µM，亚硝酸盐的检测限为0.015 µM。纳米复合修饰电极对多种常见的金属离子和某些有机干扰剂具有良好的抗干扰能力。纳米复合修饰电极用于测定自来水中的亚硝酸盐含量。RGO / MnFe ₂ O ₄ / PANI纤维纳米复合材料修饰电极的指示性能扩大了RGO / MnFe ₂ O ₄ / PANI纤维纳米复合材料在亚硝酸盐现场监测中的应用范围。