manganese oxides
Tuning the Synthesis of Manganese Oxides Nanoparticles for Efficient Oxidation of Benzyl Alcohol
... on manganese oxides that can allow the green aerobic oxidation of benzyl alcohol under mild ...the manganese oxide ...resulting manganese nanoparticles was gradually improved upon increasing ...
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Kinetics of Manganese Oxides Dissolution in Sulphuric Acid Solutions Containing Oxalic Acid
... of manganese alloys and opti- mise the dressing and leaching of manganese oxide ores, it is necessary to understand the mechanisms of these processes ...of manganese oxides is reductive ...
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Micro-Raman spectral identification of manganese oxides black pigments in an archaeological context in Northern Chile
... the manganese oxides analyses, the results suggested that the sample from Ta-1 contains different manganese minerals, particularly pyrolusite and ...natural manganese minerals, such as natural ...
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The influence of environmental conditions on kinetics of arsenite oxidation by manganese-oxides
... Mn- oxides. In the tropics, Mn-oxides will be more reactive because the underground temperature is close to 25 °C, while the same reaction will proceed more slowly in the 10 °C conditions found along the ...
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Decolorization of RhB dye by manganese oxides: effect of crystal type and solution pH
... residual manganese oxides, the XRD analy- sis was ...the manganese oxides before and after duplicating the degradation reac- tion five times show no obvious differences, indicating that the ...
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Synthesis and Electrochemical Feature of a Multiple-Phases Li-Rich Nickel Manganese Oxides Cathode Material
... Fig. 3a and 3b show SEM images of the Li-rich nickel manganese oxides samples prepared at 900 °C and 1000 °C, respectively. As observed, the sample prepared at 900 °C has a smooth surface with particle size ...
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Investigating Electrochemical Properties and Interfacial Processes of Manganese Oxides/Graphene Hybrids as High- Performance Supercapacitor Electrodes
... synthesized manganese oxides on graphene oxide and reduced graphene oxide platforms such that each component play a unique and critical function for high- ...adsorbed manganese oxides ...
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Precipitation of manganese oxides on the surface of construction materials in the Khmer temples, Cambodia
... The manganese oxides mainly exist as an amorphous phase, but some are pre- sent as birnessite and ...of manganese oxides may have been initiated by the activity of manganese oxidizing ...
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Chromite oxidation by manganese oxides in subseafloor basalts and the presence of putative fossilized microorganisms
... Mn oxides and Murray and Tebo [7] showed in experiments that Cr(III) oxidation greatly accelerated in the presence of the Mn(II) oxidizing bacterium Bacillus ...
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Characterization of Manganese Oxides/Au Nanocompsite Thin Films for Supercapacitor
... nanostructured manganese oxide electrodes are still far below the theoretical value ...of manganese oxides by adding conductive additives to improve the electron transport ...
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Characterization of Bentonite Modified by Manganese Oxides
... Figures 8-10 show SEM images of B, NaB, Ref-Mn, Mn-B and Mn-NaB. The activation of natural bentonite with sodium did not lead to significant change in its morphology (Figure 8b). The SEM analysis of Ref-Mn pointed on ...
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Template free synthesis of mesoporous manganese oxides with catalytic activity in the oxygen evolution reaction
... have observed similar slow transformations in the most active Mn-380, as shown by the slow appearance of additional reections in the XRD pattern upon prolongued ageing (see Fig. S8†), which are accompanied by a ...
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Biogenic precipitation of manganese oxides and enrichment of heavy metals at acidic soil pH.
... Importantly, in both 470 profiles, these metals are overwhelmingly associated with the Mn oxide fraction in the barrier 471 layers, despite the fact that, based on the total digest resul[r] ...
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Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides
... Oxidative scavenging of thallium by birnessite: Controls on thallium sorption and stable isotope fractionation in marine ferromanganese precipitates.. Assessing the utility of thallium a[r] ...
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Selective Sorption of Co2+ over Ni2+ Using Biogenic Manganese Oxides
... Manganese oxide deposits are often found in natural biofilms at neutral pHs in hot springs, mining sites, and hydrothermal vents. Most of these oxides are produced by microbiologically induced processes. ...
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Towards a mechanistic understanding of carbon stabilization in manganese oxides.
... Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood. Here we show that manganese oxide (Mn oxide) in a water ...
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Structural Characterization of Borate Glasses Containing Zinc and Manganese Oxides
... relevant due to their potential applications in various technological fields [12,13]. Keeping in mind the very fact of creating novel functionalities we have chosen an uncommon glass system. We report here the ...
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Hydrothermally Altered and Fractured Granite Hosting Rare Metal at Gabal Adara Adatalob, South Eastern Desert, Egypt
... Gabal Adara Adatalob granite is moderate to low, elongated belt occurs as isolated pluton trending NNW-SSE (Figure 3). A detailed geologic study was carried out on this granite (Figure 4).This granite is highly altered, ...
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A critical study on efficiency of different materials for fluoride removal from aqueous media
... Some researchers used carbon as an adsorbent for fluor- ide removal. The potential sorption capacity of multi- walled carbon nanotubes (MWCNTs) was investigated as a means of removing fluoride from the drinking water of ...
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Evaluation of Critical Fracture Skin Porosity For Contaminant Migration In Fractured Formations
... and manganese oxides [2] or calcite [3-4] and may dramatically alter the transport properties of the formations at the interface between the fracture and the ...
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