This study reports the synthesis of a nanocomposite comprised of graphene (G) supported manganese dioxide (MnO₂) incorporated into the network of polythioaniline (MnO₂-G/PTA). The hybrid composite was applied as an electrode material for the development of a bioanode. The bioanode was fabricated by the electrochemical entrapment of ferritin (Frt) as mediator and glucose oxidase (GOx) enzyme in the matrix of the as-synthesized MnO₂-G/PTA deposited on glassy carbon electrode (GCE) surface. The structural features and electrochemical behaviour of the modified electrodes were investigated by Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). The results unfolded that the hybrid electroactive support (MnO₂-G/PTA) employed for the immobilization of the enzyme (GOx) established an appropriate electrical cabling between the redox enzyme (GOx) and the electrode surface with the assistance provided by the biocompatible mediator (Frt) working to enhance the electrical signals. The developed GCE/MnO₂-G/PTA/Frt/GOx bioanode attained a maximum current density of 3.68 mAcm⁻² at 35 mM glucose concentration at a scan rate of 100 mVs⁻¹. Thus, the MnO₂-G/PTA/Frt/GOx modified electrode possesses high potential and good biocompatibility for bio-electricity production from glucose.

这项研究报告了纳米复合材料的合成，该复合材料由石墨烯（G）负载的二氧化锰（MnO ₂）掺入聚硫代苯胺（MnO ₂ -G / PTA）网络中。杂化复合材料被用作开发生物阳极的电极材料。通过在合成的MnO ₂的基质中电化学捕获铁蛋白（Frt）作为介体和葡萄糖氧化酶（GOx）酶来制造生物阳极。-G / PTA沉积在玻璃碳电极（GCE）表面上。通过傅里叶变换红外光谱（FTIR），循环伏安法（CV），线性扫描伏安法（LSV）和电化学阻抗谱（EIS）研究了修饰电极的结构特征和电化学行为。结果表明，用于固定化酶（GOx）的混合电活性载体（MnO ₂ -G / PTA）在生物相容性介体提供的协助下在氧化还原酶（GOx）和电极表面之间建立了合适的电缆连接（Frt）致力于增强电信号。研发的GCE / MnO ₂ -G / PTA / Frt / GOx生物阳极的最大电流密度为3.68 mAcm ^-2在35 mM的葡萄糖浓度下，扫描速度为100 mVs ^-1。因此，MnO ₂ -G / PTA / Frt / GOx修饰电极具有很高的电势和良好的生物相容性，可用于由葡萄糖产生生物电。