Anaerobically grown cells of the metal-reducing bacterium Shewanella putrefaciens MR-1 contain multiple outer membrane (OM) cytochromes. A gene replacement mutant (strain OMCB1) lacking the OM cytochrome OmcB is markedly deficient in the reduction of MnO2 and exhibits reduced rates of Fe(III) reduction. The levels of other OM cytochromes are also decreased in OMCB1. Complementation of OMCB1 wit...

In the present work, we have reported the in situ oxidation of manganese (II) acetate to MnO2 nanoparticles through the thermal plasma carbonized natural hydroxyapatite (MnO2/TP-NHAp) as a neoteric sustainable method. Interestingly, the thermal plasma-processed surface of the NHAp shows a great ability for oxidation of the manganese (II) without need of any external oxidizing agents. The cataly...

The effect of different cathode strategies (mullite/MnO2, Plexiglas/Gore-Tex/MnO2, mullite/coal fly ash, mullite/biochar, mullite/activated carbon) on the performance air-cathode microbial fuel cells (MFCs) was investigated. highest maximum power output observed using MnO2 catalyst pasted Gore-Tex cloth (7.7 mW/m3), yet coulombic efficiencies (CEs) were achieved (CE 23.5 ± 2.7%) and coal ash 20...

A series of FeOx-MnO2-CeO2 catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence Fe/Mn/Ce molar ratio on catalytic performance was investigated, catalyst exhibited excellent activity, with complete conversion at low temperatures (40 °C) when 2/5/5. characterized N2 adsorption desorption, XRD, H2-TPR, O2-TPD XPS techniques to il...

Manganese dioxide (MnO2)-based nanostructures are promising electrode materials for supercapacitors (SCs) due to their low cost, eco-friendly nature, and high theoretical capacitance. However, the conductivity of MnO2 is poor, which a big problem when trying achieve desired capacitance value. Herein, hexagonal-phase nanoparticles (NPs) directly grown on 3D conductive carbon cloth (CC) (denoted ...

In this era, most technology requires electronic equipment. The performance of equipment may be affected by energy storage components like a supercapacitor, so the development supercapacitor electrode materials using green chemical methods needs to pursued. Material with good specific capacitance is MnO2. Most MnO2 synthesis are not based on chemistry, there an alternative method. One them util...

Water pollution with dye effluents from different industries is a broadly established environmental and health problem that needs serious attention. In this study, making use of Acacia nilotica seed extract, greenly synthesized MnO2 nanoparticles were loaded on the surface biochar derived palm waste (MnO2/PF), specific areas 70.97 m2/g. Batch experiments adopted, aiming to evaluate performance ...

In this scientific research, MnO2 nanoparticles (NPs) have been successfully prepared by a precipitation method using KMnO4, MnSO4.H2O and H2O2 (30%) as the precursors. As-prepared sample was identified by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and Infrared (IR) techniques. The transmission electron microscopy (TEM) showed 7-8 nm rang...