objective: this study investigated tissue damages induced by chronic subcutaneous administration of nano- and microparticles of manganese dioxide (mno2) on the liver, kidneys and testes of rats. methods: rats (n=210) were divided into three groups: control, mno2 nanoparticle injected and mno2 microparticle injected. the experimental groups received subcutaneous injections with either nano- or m...

One of the most commonly produced industrial chemicals worldwide, bisphenol A (BPA), is used as a precursor in plastics, resins, paints, and many other materials. It has been proved that BPA can cause long-term adverse effects on ecosystems human health due to its toxicity an endocrine disruptor. In this study, we developed integrated MnO2/UV/persulfate (PS) process for use photocatalytic degra...

A procedure based on radiochemical neutron activation analysis was developed for the determination of chromium in biological materials. The procedure consists of irradiation of reference and test samples in a nuclear reactor, microwave sample digestion, selective and quantitative radiochemical separations of chromium and gamma-ray spectrometric measurement of 51Cr. Separation of chromium from t...

Earth abundant transition metal oxides are low-cost promising catalysts for the oxygen evolution reaction (OER). Many have shown higher OER activity than noble (RuO2 and IrO2). experimental theoretical studies been performed to understand mechanism of OER. In this review article we considered four earth oxides, namely, titanium oxide (TiO2), manganese oxide/hydroxide (MnOx/MnOOH), cobalt (CoOx/...

In this study, biosynthesized α-MnO2/NiO NPs and chemically oxidative polyaniline (PANI) were synthesized to form ternary composite anode material for MFC. The materials characterized with different (UV-Vis, FTIR, XRD, TGA-DTA-DSC, SEM-EDX-Gwyddion, CV, EIS) deeply examine their optical, structural, morphological, thermal, roughness, electrocatalytic properties. degree of surface roughness α-Mn...

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) method. syn...

MnOx was one of the important catalysts for degradation organic compounds. MnO2 with different morphology (nanotube, nanowire, nanocubic and nanoflower) were synthesized by hydrothermal method using KMnO4 MnSO4 as precursors. Firstly, their structures studied X-ray diffraction (XRD), N2 adsorption desorption curve, H2 temperature programmed reduction (H2-TPR) electron spectroscopy (XPS). Next, ...