Laboratory of Chemistry and Electrochemistry of Metallic Complexes, University of Sciences and Technology of Oran - Mohamed Boudiaf Oran, Algeria.
Laboratoiry of Physico-Chemistry of Materials, Catalysis and Environnement, University of Sciences and Technology of Oran - Mohamed Boudiaf Oran, Algeria.
Environ Technol. 2022 Apr;43(9):1359-1369. doi: 10.1080/09593330.2020.1829088. Epub 2020 Oct 13.
A microbial fuel cell is a biological electrochemical system that extracts electrons stored in organic matter by oxidation using catalytic properties of microorganisms at bioanode. The major problem in such device, is however limited power production due to slow kinetic of oxygen reduction at cathode. It is worthwhile to develop new materials that fulfil these requirements. The polymerization of aniline onto carbon cloth for effective electrodeposition of platinum nanoparticles has been carried out by chronoamperometry and cyclic voltammetry. Three materials were thus elaborated, namely pristine carbon cloth, carbon cloth modified with platinum and carbon cloth modified by polymerization of aniline for immobilization of Pt-nanoparticles. The FTIR spectroscopy analysis revealed characteristic band located in 1720-1650 cm, attributed to imine function, main component in skeleton of polymer PANI chain. The modified materials have been utilized as cathode in cell inoculated with medicinal plant wastes for improvement of oxygen reduction. Modified cathode with CC-PANI-Pt proved higher performances in all respects: increase of cell voltage from 338 to 765 mV and power density from 862 to 1510 mW/m and abatement of COD of microbial inoculum leachate to 88%. Another feature of cell with modified cathode CC-PANI-Pt, was the enormous electric charge density harvested upon oxidation of 1 mL of acetate 7.62 C/cm compared to that of cell with pristine CC cathode 0.54 C/cm. Nevertheless, coulombic efficiency for conversion of medicinal plant wastes into bioenergy was relatively lower 9%, making in evidence that elaborated electrochemical device was rather efficient and benificial environmentally than energetically.
微生物燃料电池是一种生物电化学系统，它通过生物阳极中微生物的催化特性，从有机物中提取电子进行氧化。然而，该装置的主要问题是由于阴极氧气还原动力学缓慢，导致产生的电力有限。因此，开发能够满足这些要求的新材料是很有意义的。通过计时安培法和循环伏安法，将苯胺聚合到碳纤维布上，以有效地电沉积铂纳米粒子。因此，制备了三种材料，即原始碳纤维布、用铂修饰的碳纤维布和通过苯胺聚合固定铂纳米粒子的碳纤维布。傅里叶变换红外光谱分析显示，位于 1720-1650cm 处的特征带归因于亚胺官能团，这是聚合物 PANI 链骨架的主要成分。将修饰后的材料用作接种药用植物废料的电池的阴极，以改善氧气还原。用 CC-PANI-Pt 修饰的阴极在各个方面都表现出更高的性能：电池电压从 338mV 增加到 765mV，功率密度从 862mW/m 增加到 1510mW/m，微生物接种物浸出液的 COD 降低到 88%。用修饰后的 CC-PANI-Pt 阴极的电池的另一个特点是，在氧化 1ml 醋酸时，收集的电荷量密度高达 7.62C/cm，而用原始 CC 阴极的电池仅为 0.54C/cm。然而，将药用植物废料转化为生物能的库仑效率相对较低，仅为 9%，这表明所开发的电化学装置在环境方面比在能量方面更有效和有益。
