Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.
Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India.
Sci Rep. 2020 Mar 19;10(1):5052. doi: 10.1038/s41598-020-61831-4.
Presently, one of the most important aspects for the development of enzymatic biofuel cells (EBFCs) is to synthesize the novel electrode materials that possess high current density, low open-circuit voltage (OCV) and long-term stability. To achieve the above attributes, lots of new strategies are being used by the researchers for the development of advanced materials. Nowadays, nanomaterials and nanocomposites are the promising material that has been utilized as effective electrode material in solar cells, supercapacitors and biofuel cells application. Herein, we account for a novel electrocatalyst as electrode material that comprised ZnO nanoparticles decorated on the surface of polyindole (PIn)-multi-walled carbon nanotube (MWCNT), for the immobilization of glucose oxidase (GOx) enzyme and mediator (Ferritin). The PIn-MWCNT scaffold is prepared via in situ chemical oxidative polymerization of indole on the surface of MWCNT and assessed by myriad techniques. The micrograph of scanning electron microscopy (SEM) designated the interconnected morphology of MWCNTs in the polymer matrix. X-ray diffraction spectroscopy (XRD) and Fourier transform infrared spectroscopy (FTIR), confirm the crystallinity and different functional groups available in the synthesized material, respectively. The electrochemical assessment demonstrates that the ZnO/PIn-MWCNT/Frt/GOx nanobiocatalyst exhibits much higher electrocatalytic activity towards the oxidation of glucose with a maximum current density of 4.9 mA cm by consuming 50 mM glucose concentration in phosphate buffer saline (PBS) (pH 7.4) as the testing solution by applying 100 mVs scan rates. The outcomes reflect that the as-prepared ZnO/PIn-MWCNTs/Frt/GOx biocomposite is a promising bioanode for the development of EBFCs.
目前，酶生物燃料电池（EBFCs）发展最重要的方面之一是合成具有高电流密度、低开路电压（OCV）和长期稳定性的新型电极材料。为了实现上述特性，研究人员正在使用许多新策略来开发先进材料。如今，纳米材料和纳米复合材料是一种很有前途的材料，已被用作太阳能电池、超级电容器和生物燃料电池应用中的有效电极材料。在此，我们介绍了一种新型电催化剂作为电极材料，该材料由氧化锌纳米粒子修饰在聚吲哚（PIn）-多壁碳纳米管（MWCNT）的表面，用于固定葡萄糖氧化酶（GOx）酶和介体（铁蛋白）。PIn-MWCNT 支架是通过在 MWCNT 表面原位化学氧化聚合吲哚制备的，并通过多种技术进行评估。扫描电子显微镜（SEM）的显微照片指定了 MWCNTs 在聚合物基质中的互连形态。X 射线衍射光谱（XRD）和傅里叶变换红外光谱（FTIR）分别确认了合成材料的结晶度和不同的官能团。电化学评估表明，ZnO/PIn-MWCNT/Frt/GOx 纳米生物催化剂对葡萄糖氧化具有更高的电催化活性，在磷酸盐缓冲盐水（PBS）（pH 7.4）中以 50 mM 葡萄糖浓度作为测试溶液，在 100 mVs 的扫描速率下，最大电流密度为 4.9 mA cm。结果表明，所制备的 ZnO/PIn-MWCNTs/Frt/GOx 生物复合材料是开发 EBFCs 的有前途的生物阳极。
