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Cations and Anion - Astrophysics Data System

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Last Updated: 27 July 2022

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Comparative study of absorption band edge tailoring by cationic and anionic doping in TiO2

Titanium dioxide is one of the most commonly used metal oxide semiconductors for the use as photoanode in photoelectrochemical cells, converting the water into hydrogen and oxygen. This paper discusses the synthesis of undoped and iron and nitrogen doped nanocrystalline titanium dioxide by sol-gel spin coating technology for solar energy absorption in the visible region.

Source link: https://ui.adsabs.harvard.edu/abs/2018MatSP..36..435M/abstract


Pushing the limit of 3d transition metal-based layered oxides that use both cation and anion redox for energy storage

For decades, intercalation chemistry has dominated electrochemical energy storage, and storage capacity globally has now hit the terawatt-hour level. Li-ion batteries' current state-of-the-art intercalation cathodes operate within the limits of transition metal cation electrochemistry, but anion-redox reactions in recent decades have uncovered substantial potential for increasing stored energy densities. The discovery of new materials for next-generation cathodes has been sparked by the abundance of compounds that exhibit anion redox in the solid state. We describe the steps that may lead to anion redox and the accompanying kinetic pathways that can occur in layered transition metal oxides in this Study.

Source link: https://ui.adsabs.harvard.edu/abs/2022NatRM...7..522Z/abstract


Effect of cationic, anionic and non-ionic surfactants on transport of microplastics: Role of adhesion of surfactants on the polyethylene surface

Column experiments were carried out on the suspensions of 15 surfactants mixed and dispersed with PE microplastics to see the promoting effect of various surfactants on PE transport in saturated porous media in this work. Measured characteristics of the fluid contact angle of surfactant on PE's surface, as well as the surface tension and zeta potential of a PE/surfactant dispersion system were determined. The interaction energies between PE/surfactant and medium, adhesion of surfactant on PE surface, and Young's equation were estimated respectively using DLVO theory and Young's equation. The minimum single molecule adsorption area of surfactant on the PE surface was negatively related to PE column recovery in the column under the same type of surfactant.

Source link: https://ui.adsabs.harvard.edu/abs/2022JHyd..61228051S/abstract


Temperature-Responsive Polysaccharide Microparticles Containing Nanoparticles: Release of Multiple Cationic/Anionic Compounds

Microparticles with diameters over 1 u00b5 million are the majority of drug carriers used in pulmonary administration. In a stepwise manner, the prepared microparticles containing nanoparticles may release two separately charged compounds. The particles have two distinct drug delivery pathways: one is the release of nanoparticle inclusions from the nanoparticles, and the other is the release of microparticle inclusions during microparticle decay. These polysaccharide microparticles containing nanoparticles are expected to be used as temperature-responsive drug carriers, not only for respiratory disease but also for various administrative routes, including transcutaneous, intramuscular, and transdermal routes, which can pump multiple medications in a controlled manner.

Source link: https://ui.adsabs.harvard.edu/abs/2022Mate...15.4717S/abstract


Enhanced mobility of cations and anions in the redox state: The polaronium mechanism

When the counterion comes from a d 0 or f 0 cation or a p 6 anion in the host compound, a polaronium, described as a transitory complex of a polaronic electron or hole and a migrating counterion, becomes highly mobile. Our results found such interaction at its peak during the saddle period, which is so soft that it permits a reorientation of the anisotropic d/f/p orbital to minimize the electron repulsion locally. Since the complex may dissolve after a successful ion-migration event, the redox electron/hole can be reused to produce yet another free-radical-like polaronium elsewhere, raising ion migration continuously. The proposed polaronium reaction, as well as ceramics doped with mixed-valence cations, is the most relevant under challenging and challenging thermal/field/irradiation conditions, where extra electrons/holes are abundantly generated by non-equilibrium redox reactions.

Source link: https://ui.adsabs.harvard.edu/abs/2022AcMat.23217941D/abstract


First-principles calculations on the diffusion and electronic properties of CuI doped by cation and anion

Due to CuI's wide band gap of 3. 1 eV, the optoelectronic devices have attracted a lot of attention. The band gap between Br, Cl, and F at the I site narrowed to 1. 08, 1. 06, and 1. 00 ev as compared to 1. 09 ev for undoped CuI. The anion at the interstitial site contains several unoccupied states at 0. 06 eV above the maximum valence band maximum, raising the p-type conductivities.

Source link: https://ui.adsabs.harvard.edu/abs/2022ResPh..3805595J/abstract


Does [Tf2N]− slither? Equivalence of cation and anion self-diffusion activation volumes in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide

According to a study in the literature that they differ significantly, high-pressure self-diffusion results for the ionic liquid 1-ethyl-3-methylimidazolium bisamide at pressures up to 348 MPa. Stokes_u2013Einsteinu2013Einsteinu2013Sutherland analysis and density scaling are applied to the [EMIM][Tf2N] self-diffusion measurements, which support the conclusion that pressure influences both cation and anion mass transport in the same way.

Source link: https://ui.adsabs.harvard.edu/abs/2022PCCP...2414430H/abstract


Dual doping with cations and anions for enhancing the structural stability of the sodium-ion layered cathode

cation and anion dual doping improved structural stability. Improved electrochemical properties were discovered by first-principles-based experiments to determine the right combination of cations and anions as dual dopants for enhancing the physical stability of the sodium-ion layered cathode for use in sodium ion batteries. Fluoride was selected as the anion dopant to give the general formula NaNi0. 42Mn0. 5D0. 08F0. 04, resulting in a total of twelve different combinations of cation and anion co-doped structures. The present research reveals an essential design map for the creation of an effective dual doping program for SIBs.

Source link: https://ui.adsabs.harvard.edu/abs/2022PCCP...2413006M/abstract


Molecular Dynamics Simulation Study on the Interactions of Mixed Cationic/Anionic Collectors on Muscovite (001) Surface in Aqueous Solution

According to the snapshot, interaction energy, radial dispersion function, and density analysis between the Mcv surface and collector molecules, the individual DDAHC collector was an efficient collector for Mcv's flotation. The mixed anionic/cationic collectors were adsorbted on the Mcv surface, dsorbing the mixed anionic/cationic collectors, whereas SDS and SDBS collectors were co-addressed with DDAHC. The results of micro-flotation experiments showed that the DDAHC collector could help Mcv's flotation recovery in a neutral aqueous solution, which was in accordance with MDS-derived findings. According to the presenter, DDAHC alone is the most effective collector for Mcv flotation under neutral aqueous conditions, while the combination of DDAHC and SDBS collectors displays the same flotation results.

Source link: https://ui.adsabs.harvard.edu/abs/2022Mate...15.3816D/abstract


MIL-100(Fe)@GO composites with superior adsorptive removal of cationic and anionic dyes from aqueous solutions

The removal of synthetic dyes from industrial wastewater discharges is a significant step in combating water pollution. Cleaning pollutant dyes from industrial wastewater prior to its discharge into the environment is an essential step; thus, synthesizing new adsorbent materials with superior adsorption capabilities is a significant undertaking. MIL-100@GO composites with excellent adsorption results against methyl orange, Congo red, methylene blue, and acid chrome blue K are among MIL-100@GO composites with outstanding adsorption results against methyl orange, Congo red, methylene blue, and acid chrome blue K exhibited herein. According to the following table, MIL-100@GO-1's adsorption capacities for these dyes were 533. 7, 760. 1, 1386. 3, and 1786. 6 mg -1, up from those estimated for pristine MIL-100 by 31. 1%, 17. 8%, 59%, and 8. 9%, respectively, exceeding those values for pristine MIL-100@GO-1 by 33. 7, 3. 8 percent, 540. 8, 589. 8%, 53. 9 percent, 96. The adsorption rises of MIL-100@GO toward the pollutant dyes was limited by the synergistic results of the hydrogen bonding, hydrophobic reactions, u03c0-u03c0 interactions, and MIL-100@GO's granular pores.

Source link: https://ui.adsabs.harvard.edu/abs/2022JMoSt126533365Z/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions