Articles with "fe2 fe3" as a keyword



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Antimicrobial activity of Fe‐loaded chitosan nanoparticles

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Published in 2017 at "Engineering in Life Sciences"

DOI: 10.1002/elsc.201600172

Abstract: To increase the antimicrobial activities of chitosan, chitosan nanoparticles loaded with Fe2+ or Fe3+ were prepared by surfactant‐assisted chitosan chelating Fe2+, Fe3+ and ionic gelation chitosan. Their chelating rates were determined by spectrophotometry. The particle… read more here.

Keywords: fe2 fe3; nanoparticles loaded; chitosan nanoparticles; antimicrobial activity ... See more keywords
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Redox effect of Fe2+/Fe3+ in iron phosphates for enhanced electrocatalytic activity in Li-O2 batteries

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Published in 2020 at "Chemical Engineering Journal"

DOI: 10.1016/j.cej.2020.124294

Abstract: Abstract FePO4 and porous Fe2P2O7 laundry-ball-like nanostructures (FePO4 LBs and p-Fe2P2O7 LBs, respectively) were prepared to investigate their functionalities as oxygen-electrode (O2-electrode) electrocatalysts in Li–O2 batteries. These structures were synthesized in two steps, via hydrothermal… read more here.

Keywords: fe2 fe3; redox effect; fe2p2o7 lbs;
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Enhancing biochar oxidation reaction with the mediator of Fe2+/Fe3+ or NO2-/NO3- for efficient hydrogen production through biochar-assisted water electrolysis

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Published in 2021 at "Energy Conversion and Management"

DOI: 10.1016/j.enconman.2021.114523

Abstract: Abstract The biochar-assisted water electrolysis (BAWE) is a promising method for clean biomass utilization and hydrogen production. But it is limited by the slow anode biochar oxidation reaction (BOR). To enhance the BOR, the mediator… read more here.

Keywords: fe3; hydrogen; oxidation; production ... See more keywords
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ATR-FTIR Spectroelectrochemical Study on the Mechanism of the pH Dependence of the Redox Potential of the Non-Heme Iron in Photosystem II.

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Published in 2021 at "Biochemistry"

DOI: 10.1021/acs.biochem.1c00341

Abstract: The non-heme iron that bridges the two plastoquinone electron acceptors, QA and QB, in photosystem II (PSII) is known to have a redox potential (Em) of ∼+400 mV with a pH dependence of ∼-60 mV/pH.… read more here.

Keywords: fe2 fe3; non heme; dependence; heme iron ... See more keywords
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Silica-Carbonate of Ba(II) and Fe2+/Fe3+ Complex as Study Models to Understand Prebiotic Chemistry

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Published in 2021 at "ACS Omega"

DOI: 10.1021/acsomega.1c05415

Abstract: The Precambrian era is called the first stage of the Earth history and is considered the longest stage in the geological time scale. Despite its duration, several of its environmental and chemical characteristics are still… read more here.

Keywords: chemistry; iron; fe2 fe3; chemical ... See more keywords
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Fluorescence “Turn-Off” and Colorimetric Sensor for Fe2+, Fe3+, and Cu2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold

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Published in 2022 at "ACS Omega"

DOI: 10.1021/acsomega.1c07193

Abstract: Two cyanoimidazopyridine-based sensors (SS1 and SS2) were explored for the colorimetric and fluorometric detection of Fe2+, Fe3+, and Cu2+ ions in the semi-aqueous medium. The “turn-off” fluorescence response of both sensors to these ions was… read more here.

Keywords: fe3 cu2; fe2 fe3; cu2 ions;
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Recognition, mechanistic investigation and applications for the detection of biorelevant Cu2+/Fe2+/Fe3+ ions by ruthenium(II)-polypyridyl based fluorescent sensors.

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Published in 2021 at "Dalton transactions"

DOI: 10.1039/d0dt03488f

Abstract: The present article focuses on fluorescent probes based on Ru(ii)-polypyridyl fragments connected to different chelates, their significant roles in coordination chemistry and their applications in the selective recognition of biorelevant Cu2+ and Fe2+/Fe3+ ions. A… read more here.

Keywords: fe2 fe3; fe3 ions; cu2 fe2; biorelevant cu2 ... See more keywords
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Potentiometric Performance of Ion-Selective Electrodes Based on Polyaniline and Chelating Agents: Detection of Fe2+ or Fe3+ Ions

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Published in 2022 at "Biosensors"

DOI: 10.3390/bios12070446

Abstract: We constructed a sensor for the determination of Fe2+ and/or Fe3+ ions that consists of a polyaniline layer as an ion-to-electron transducer; on top of it, chelating molecules are deposited (which can selectively chelate specific… read more here.

Keywords: potentiometric performance; performance ion; fe3 ions; ion selective ... See more keywords
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Fe Speciation in Iron Modified Natural Zeolites as Sustainable Environmental Catalysts

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Published in 2019 at "Catalysts"

DOI: 10.3390/catal9100866

Abstract: Natural purified mordenite from Palmarito de Cauto (ZP) deposit, Cuba, was subjected to a hydrothermal ion exchange process in acid medium with Fe2+ or Fe3+ salts (Fe2+ZP and Fe3+ZP). The set of samples was characterized… read more here.

Keywords: fe2 fe3; speciation iron; catalysts speciation; fe3 ... See more keywords