Ultrafast Synthesis of Exfoliated Manganese Oxides in Deep Eutectic Solvents for Water Purification and Energy Storage

Add time:08/29/2019    Source:sciencedirect.com

In the present study, we explore a facile route for the ultrafast preparation of nanostructured MnxOy at room temperature in a short reaction time using KMnO4 as precursor and deep eutectic solvents (DESs; such as CC-EG, CC-Glucose, and CC-EG-Glucose) as ecofriendly solvent cum reducing agent. A detailed study was undertaken to examine the reaction kinetics of MnxOy preparation using various analyitcal tools. Under optimized process conditions magnificent water flux of 5736 Lm-2h-1 for dye contaminated feed with excellent rejection of >99% was achived with a maximum adsorption capacity of 253 mg.g-1, whereas the recyclability studies ensured >93% rejection even after 10cycles. Moreover, the prepared symmetric coin cells showed a high specific capacitance of 207 Fg-1 at a mass specific current of 0.05 Ag-1. Also the device exhibits a respectable rate capability of 63.57% in-between the current density range of 1-10 Ag-1 with a capacitance of 151-96 Fg-1. Cyclic stability studies revealed that the material can be stable with a capacity retention of 80.5% and 69.4% after 5000 and 10,000 cycles respectively, with a coulombic efficiency of 100%. In addition to that the material illustrated with a high energy density 18.37 Wh.kg-1 (at 0.05Ag-1) and power density 24000 W.kg-1 (at 30Ag-1).

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