Scientists have become interested in treating dye-contaminated water due to the health issues and ecological imbalances caused by presence of these injurious compounds water. Herein, two MnO2 polymorphs i.e. ε- γ-MnO2 were prepared comproportionation reaction between KMnO4 MnCl2. In comparison γ-MnO2, ε-MnO2 has greater surface area, pore width, volume. According thermal study, contains more su...

In recent years, typical organic pollutants were frequently found in aquatic environments. Among them, synthetic dyes widely used many industries, which resulting a large amount of wastewater contained dyes. Because the characteristic complex components, poor biodegradability and high toxicity, this kind brought lots harm to ecological environment organism. study, three different types manganes...

Controlling the cation to anion (Mn2+/MnO4−) molar ratios of precursors was used obtain a highly performance capacitive properties nanostructural MnO2 hybridized carbon-based materials on nickel foam (NF) through successive ionic layer adsorption and reaction technology. SEM, XRD, BET, XPS analyses are utilized investigate influence cation/anion as-obtained electrode materials. At lower ratio 1...

In the science and technology of electrochemical energy storage, different allotropes MnO2, fabricated with a variety methods, are assembled into electrodes, playing role cathode or ORR electrocatalyst. Often, MnO2-based cathodes combined Zn anodes types batteries, resulting in contact between MnO2 its reaction products, Zn2+. Awareness is growing that this interaction adversely affects functio...

Pseudomonas putida GB-1 is a Mn(II)-oxidizing bacterium that produces pyoverdine-type siderophores (PVDs), which facilitate the uptake of Fe(III) but also influence MnO2 formation. Recently, a non-ribosomal peptide synthetase mutant that does not synthesize PVD was described. Here we identified a gene encoding the PVDGB-1 (PVD produced by strain GB-1) uptake receptor (PputGB1_4082) of strain GB...

The morphology-controlled synthesis of SnO2 hollow/nanoporous nanostructures (nanotubes, urchin-like morphologies and nanospheres) was achieved via a template-engaged replacement reaction at a mild temperature (lower than 80 °C). The formation mechanism of hollow interior and nanoporous walls for the obtained SnO2 nanostructures (SnO2 nanotubes were used as an example) was investigated based on...

Rechargeable aqueous aluminium batteries are the subject of growing interest, however, charge storage mechanisms at manganese oxide-based cathodes remain poorly understood. In essense, every study proposes a different mechanism. Here, an in situ spectroelectrochemical methodology is used to unambiguously demonstrate that reversible proton-coupled MnO2-to-Mn2+ conversion main mechanism occurring...

Supercapacitor electrodes, composed of vertically-oriented graphene (VG) and MnO2, are synthesized on native SiO2-passivated silicon wafers. The VG layers with a thickness ~3 μm deposited directly the substrates via plasma-enhanced chemical vapor deposition (PECVD). distribution levels MnO2 formed electrodepositing method investigated by using different types solutions. deeper infiltration depo...

The field of impact electrochemistry, namely, electrochemical processes occurring at nanoparticles during collisions with a substrate electrode, has recently been applied to the recovery commercially important metals. In this study, reduction and oxidation solution Mn(II) were observed on carbon black particles nanoimpacts, onset potentials in good agreement voltammetry. formation Mn(0) MnO2 wa...

In this work, zeolite NaY was prepared by hydrothermal method. Then, silver ions were replaced in the zeolite NaY with silver nitrate (AgNO3) solution via using ion exchange (IE) method. The Manganese dioxide (MnO2) nanoparticles (9.3 and 15.8 wt %) for guest were deposited in the zeolite AgY(host) structure with Mn(NO3)2 aqueous and KMnO4 solutions by confined space synthesis (CSS) metho...