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Cations And Anion - Astrophysics Data System

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Last Updated: 03 October 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 use as photoanode in photoelectrochemical cells, converting the water into hydrogen and oxygen. This paper discusses the synthesis of undoped, as well as iron and nitrogen doped nanocrystalline titanium dioxide by sol-gel spin coating technique for solar energy absorption in the visible region.

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


Time-resolved terahertz-Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water

We find that the intermolecular rotational-to-translational energy transfer is enhanced by highly charged cations and dramatically reduced by highly charged anions, increasing with ion surface charge density and ion concentration, increasing with the ion surface charge density and ion concentration. Our molecular dynamics experiments show that the water-water hydrogen bond strength between the first and second solvation shells of cations increases, while the anions decreases. The opposite effects of cations and anions on the intermolecular interactions of water mimic the effects of ions on protein stability and denaturation.

Source link: https://ui.adsabs.harvard.edu/abs/2022NatCh..14.1031B/abstract


A Special Additive Enables All Cations and Anions Passivation for Stable Perovskite Solar Cells with Efficiency over 23%

For increased photovoltaic results and stability of perovskite solar cells, passivating undercoordinated ions is a cost-effective way to minimize defect densities at the surface and grain boundaries of perovskite materials. Complex is chosen as a multifunctional additive, which includes both C 7 and BF 3 groups, respectively, in the perovskite film, allowing for bonding with Pb 2+ /I u2212 and FA+ on the surface and in the GBs, allowing for passivation of both cation and anion defects. The complex of the C 7 H 9 N and BF 3 complex's synergistic effect reduces the crystallization during film deposition to decrease nonradiative recombination loss and minimizes moisture permeation to maintain the perovskite film's stability, which improves the perovskite film's stability.

Source link: https://ui.adsabs.harvard.edu/abs/2021NML....13..169Z/abstract


Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Although aqueous zinc-ion batteries have gained a lot of attention due to their numerous uses, the frozen aqueous electrolyte prevents their use under low temperature conditions. Multi-perspective characterization reveals the synergistic effect of cation and anion on the hydrogen-bond network of original water molecules. When the temperature drops to u2212 70 °C, the Zn|PTO battery shows a high discharge capacity of 101. 5 mAh g u22121 at 3 C.

Source link: https://ui.adsabs.harvard.edu/abs/2021NML....13..204S/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 in this study on 15 surfactants mixed and dispersed with PE microplastics to see the promoting effect of various surfactants on PE transport in saturated porous media. Measurements revealed the following dynamic contact angle of surfactant on PE surface, surface tension, and zeta potential of PE / surfactant dispersion systems. The coup coefficients between PE /surfactant and medium, as well as adhesion of surfactant on PE surface, were estimated respectively according to DLVO theory and Young's equation. The minimization of 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. The persistent adhesion of surfactant on PE surface was triggered by the small adsorption area of a single molecule, which eventually helped PE surface achieve greater stability and penetration.

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


Removal of cationic and anionic dyes using purified and surfactant-modified Tunisian clays: Kinetic, isotherm, thermodynamic and adsorption-mechanism studies

Purified and surfactant-modified Tunisian clays were tested for their ability to remove cationic and anionic dyes from aqueous solution. Batch-sorption experiments were carried out to determine the effects of pH, contact time, initial dye concentration, and temperature on dye adsorption. To determine the kinetic parameters, the kinetic parameters were determined, Pseudo-first order, pseudo-second order, intra-particle diffusion, and Elovich kinetic models were considered. The purified Tunisian clays are excellent adsorbents for the removal of the cationic dye CV, and their modified form is suitable for the removal of the anionic dye, MO, from aqueous solution.

Source link: https://ui.adsabs.harvard.edu/abs/2018ClMin..53..159G/abstract


Electronic structures and thermoelectric properties of (Ag, Te), (Sn, Te) and (Sb, Te) dually doped PbSe on cationic and anionic sites

The findings reveal that and dual doping introduces additional bands near Fermi levels, likely to increase the thermoelectric properties. PbSe's thermoelectric results are the best thermoelectric result, and its ZT value at 550 K is 0. 78, which is 63% higher than PbSe's average.

Source link: https://ui.adsabs.harvard.edu/abs/2022PhyB..64514269L/abstract


Surface cationic and anionic dual vacancies enhancing photocatalytic activity of Bi 2 WO 6

Bi 2 WO 6 with surface tungsten and oxygen vacancies were prepared by a simple alkali etching process, and the number of vacancies was reduced by altering the etching time. In short, the Bisphenol A degradation efficiency of Bi 2 WO 6 etched for 2 hours can reach 90% under simulated sunlight irradiation, and under visible light irradiation, it achieves 92% in 90 minutes.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApSS..60254311Z/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 worldwide storage capacity has now hit the terawatt-hour level. Li-ion battery cathodes operate within the limits of transition metal cation electrochemistry, but the emergence of anion-redox reactions in recent decades has provided significant opportunities for significantly increasing stored energy densities. The discovery of new materials for next-generation cathodes has been inspired by the abundance of compounds that display anion redox in the solid state. In this Review, we discuss the mechanisms that may lead to anion redox and the corresponding kinetic pathways that can occur in layered transition metal oxides.

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


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

Microparticles with diameters greater than 1 u00b5m are the most commonly used drug carriers in pulmonary administration. In a stepwise manner, the prepared microparticles containing nanoparticles can release two differently charged compounds. The particles are released nanoparticle inclusions from the nanoparticles, while the other is the release of microparticle inclusions during microparticle disintegration. These polysaccharide microparticles embedded nanoparticles are expected to be used as temperature-responsive drug carriers not only for respiratory disease but also for several administration routes, including transpulmonary, intramuscular, and transdermal routes, which can provide multiple medications in a controlled manner.

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