Recovery of Pure ZnO Nanoparticles from Spent Zn-Mno2 Alkaline Batteries

Deep, Akash and Kumar, Kamal and Kumar, Parveen and Kapur, Pawan and Sharma , A.L. and Gupta, Bina and Bharadwaj, L.M. (2011) Recovery of Pure ZnO Nanoparticles from Spent Zn-Mno2 Alkaline Batteries. Environmental Science and Technology, 45 (24). pp. 10551-10556. ISSN 0013-936X

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The recovery of pure ZnO (zinc oxide) nanoparticles from spent Zn-Mn dry alkaline batteries is reported. Spent batteries were dismantled to separate the contained valuable metals of the cell electrodes in the form of black powder. Treatment of this black powder with 5 mol L(-1) HCl produced leach liquor, primarily containing 2.90 g L(-1) Zn and 2.02 g L(-1) Mn. Selective and quantitative liquid-liquid extraction of Zn(II) was then carried out in three counter current steps by using Cyanex 923 (0.10 mol L(-1) in n-hexane). Zn(II) distributed in the organic phase as complex ZnCl(2)·2R (R = Cyanex 923 molecule). The metal loaded organic phase was subjected to combust at 600 °C to yield pure ZnO nanoparticles (40-50 nm). Important characteristics of the synthesized nanoparticles were investigated by field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction spectroscopy (XRD), and atomic force microscopy (AFM).

Item Type: Article
Subjects: CSIO > Nano Science and Nano Technology
Depositing User: Ms. J Shrivastav
Date Deposited: 23 Apr 2012 11:35
Last Modified: 23 Apr 2012 11:35

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