Effect of iron doped Zinc oxide nanoparticles coating in the anode on current generation in microbial electrochemical cells. (22nd January 2019) - Muthukumar, Harshiny
Abstract: In this study, Iron doped Zinc oxide (FeZnO) nanoparticles (NPs) were synthesized and coated on carbon paper electrode. The NPs and NPs coated electrode physicochemical, antimicrobial, antibiofilm traits and MFC performances were investigated. The characterization results depicted that FeZnO NPs were hexagonal rod shape with hexagonal phase structure in size of 90–100 nm have 59 m 2 /g surface area. Antibiofilm results indicates concentration of 5 mg/L of NPs shows 39 and 42% inhibition for Lysinibacillus Sphaericus and Bacillus safensis . The antibacterial assay confirmed that test organism was more resistant against NPs and coated electrode. Impedance analysis of NPs coated anode shown decreased anodic charge transfer resistance. The MFC results confirmed that power density was increased for NPs coated electrode (134.7 mW/m 2 ) as compared to uncoated electrode. Cyclic Voltammetry analysis reported that exoelectrogenesis was promoted by NPs. The NPs coated and bare electrode COD removal efficiency were found to be 72.8 and 63.8%. Graphical abstract: Image 1 Highlights: Biogenic synthesis of leaf extract mediated Fe doped ZnO nanoparticles. L. sphaericus and B. safensis bacteria was more resistant against NPs. FeZnO NPs coated anode holds good hydrophilicity and unique electric property. NPs coated anode enhances energy generation and waste water treatment efficiency.