Results 101 to 110 of about 92,639 (291)

Band Gap in Magnetite above Verwey Temperature Induced by Symmetry Breaking

open access: yesThe journal of physical chemistry. C, Nanomaterials and interfaces, 2017
Magnetite exhibits a famous phase transition, called Verwey transition, at the critical temperature TV of about 120 K. Although numerous efforts have been devoted to the understanding of this interesting transition, up to now, it is still under debate ...
Hongsheng Liu, C. Di Valentin
semanticscholar   +1 more source

A novel magnetically separable pH sensitive surface‐active iron oxide nanoparticles for the removal of antibiotics (tetracycline) from aquatic environments

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Sources and distribution of antibiotic contamints in the environments. Abstract This research examines the application of magnetic iron‐oxide (Fe3O4) nanoparticles (IONPs) for the targeted removal and recovery of tetracycline (TC) from aqueous systems.
Charles Wroblewski   +5 more
wiley   +1 more source

Magnetic Response of Paramagnetic Metal–Organic Frameworks Under an External Magnetic Field and Its Application for Sorption Quantification

open access: yesChemistry–Methods, EarlyView.
Strong external magnetic fields can keep paramagnetic porous particles static without falling down while immersed in a liquid medium, and the strength of the required magnetic field, controlled indirectly by the distance to a permanent magnet, correlates with the mass of adsorbate captured, giving rise to a new technique for quantifying adsorption ...
Rubén Pérez‐Aguirre   +5 more
wiley   +1 more source

Electrosynthesis of Silane‐Modified Magnetic Nanoparticles for Efficient Lead Ion Removal

open access: yesChemSusChem, EarlyView.
Iron oxide nanoparticles (IONPs) were electrosynthesized in a non‐aqueous electrolyte at a voltage of 40 V, exhibiting high crystallinity and enhanced magnetic properties due to electrothermal annealing by the Joule heating effect. Electrosilanization of IONPs with tetraethoxysilane (TEOS) resulted in silica‐coated IONPs (Fe2O3@SiO2), which ...
Ayman E. Ahmed Elkholy   +7 more
wiley   +1 more source

Mechanochemistry: Unravelling the Impact of Metal Leaching in Organic Synthesis

open access: yesChemSusChem, EarlyView.
The analysis of metal leaching from jar walls remains an overlooked aspect during the development of a mechanochemical reaction. This comprehensive study reveals the processes of metal erosion and the formation of rusty particles under intense grinding conditions, alongside their significant impact on chemical reaction efficiency, selectivity, and ...
Francesco Basoccu   +2 more
wiley   +1 more source

On the ‘centre of gravity’ method for measuring the composition of magnetite/maghemite mixtures, or the stoichiometry of magnetite-maghemite solid solutions, via 57Fe Mössbauer spectroscopy

open access: yes, 2017
We evaluate the application of 57Fe Mössbauer spectroscopy to the determination of the composition of magnetite (Fe3O4)/maghemite (γ-Fe2O3) mixtures and the stoichiometry of magnetite-maghemite solid solutions.
J. Fock   +7 more
semanticscholar   +1 more source

Field investigation of grout propagation within a caving mass under flowing water conditions in a metal mine

open access: yesDeep Underground Science and Engineering, EarlyView.
This study investigated the characteristics of two‐liquid slurry propagation filling of underground concealed spaces under flowing water conditions in metal mines using on‐site engineering tests. We proposed four different grout stratigraphic classifications, investigated four main factors affecting grout propagation, and summarized five different ...
Baofu Wu   +5 more
wiley   +1 more source

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