We report the electrochemistry of a hitherto unexplored Na MoS phase as a conversion electrode material for Na- and Li-ion batteries. The material adopts an amorphous coordination polymer structure with mixed Mo and S valences. XPS and XRD analysis reveal a complex interplay between Mo and S redox chemistry, while excluding the formation of free sulfur, lithium sulfide, or other crystalline phases. Na MoS behaves as a mixed ionic-electronic conductor, with electronic conductivity of 6.1×10 S cm , that permits carbon-free application in an electrochemical cell. A reversible capacity of up to 500 mAh g was attained, corresponding to a five-electron redox exchange, with species ranging from
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RSC Adv
January 2025
TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de San Sebastián Mikeletegi Pasealekua 2 20009 Donostia-San Sebastián Spain +34 944 041 445 +34 946 430 850.
A downstream process for the recovery and purification of acetic acid (AA) from an extremely diluted solution (100 mg L) also containing a mixture of contaminating inorganic salts in the form of bicarbonates, phosphates, sulfates and chlorides (DPM medium) has been developed, showing its technical feasibility. The process involves two successive steps based on the use of a mixed bed ion exchange (IEX) resin. The first step, a demineralization treatment to remove the inorganic anions that could potentially interfere with the recovery and purification of AA, involves a combined treatment of calcium precipitation, acidification with the Amberlite IR-120 resin and treatment with the Amberlite MB20 mixed bed resin.
View Article and Find Full Text PDFRSC Adv
January 2025
Department of Chemical and Biomolecular Engineering, Case Western Reserve University Cleveland OH USA
Water-in-salt electrolytes provide an expanded electrochemical potential window, thus enabling a wide range of battery chemistries based on readily available salts and water. This study introduces a binary salt approach for achieving high K concentration with a tunable solvation sphere composed of acetate (Ac) and trifluoromethane sulfonate (OTf) anions, and water. Combining the hydrophilic low-cost potassium acetate with hydrophobic potassium trifluoromethane sulfonate salts, 36 molal liquid electrolyte, K(Ac)(OTf)·1.
View Article and Find Full Text PDFACS Omega
December 2024
Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Chennai Campus, Vandalur-Kelambakkam Road, Chennai, Tamil Nadu 600127, India.
Electronic waste (e-waste) has become a significant environmental concern worldwide due to the rapid advancement of technology and short product lifecycles. Waste-printed electronic boards (WPCBs) contain valuable metals and semiconductors; among them, tin can be recycled and repurposed for sustainable material production. This study presents a potential ecofriendly methodology for the recovery of tin from WPCBs in the form of tin oxide nanostructured powders.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Chitosan, as a natural and environmentally friendly material, has attracted significant attention in the field of water treatment. In this study, a Chitosan/poly (dimethyl diallyl ammonium chloride-co-acrylamide) composite hydrogel (CPDA hydrogel) featuring a semi-interpenetrating network structure was synthesized via free radical copolymerization for the removal of the anionic dye Congo Red (CR) from wastewater. SEM-EDS, FTIR, XPS, TG, Zeta potential, and mercury intrusion porosimetry (MIP) were employed to analyze the physical and chemical changes in the hydrogel before and after adsorption.
View Article and Find Full Text PDFChemosphere
January 2025
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy.
This research aims to design a novel selective and multifunctional adsorbent based on Al/Cu modified hemp fibres as a novel and multifunctional adsorbent for removing different classes of pollutants. The adsorbent, which was widely characterized, was shown to be more effective in removing anionic dyes compared to cationic ones. Among the tested dye, methyl orange was selected to understand how different parameters, such as temperature (20-80°C), contact time, pH (2-12), initial dye concentration (50-300 ppm), salinity and adsorbent dosage (1-10 g/L) affect the removal capacity.
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