title: Recovery of pure ZnO nanoparticles from spent Zn-MnO₂ alkaline batteries.
abstract: 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).
authors: Biomolecular Electronics and Nanotechnology Division, Central Scientific Instruments Organization (CSIR-CSIO), Sector 30C, Chandigarh 160030, India. dr.akashdeep@gmail.com
authors: Akash
authors: A
authors: Deep
authors: Kamal
authors: K
authors: Kumar
authors: Parveen
authors: P
authors: Kumar
authors: Pawan
authors: P
authors: Kumar
authors: Amit L
authors: AL
authors: Sharma
authors: Bina
authors: B
authors: Gupta
authors: Lalit M
authors: LM
authors: Bharadwaj
mesh_terms: D011211:Electric Power Supplies; D059029:Electronic Waste; D006863:Hydrogen-Ion Concentration; D017895:Manganese Compounds / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D010087:Oxides / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000032:analysis / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; C027424:manganese oxide; D015034:Zinc Oxide