Engineered Zinc Oxide Nanocrystals for Detection of Heavy Metals
Abstract
First time Zinc oxide nanocrystals(ZnONCs) were synthesized by chemical synthesis method. They were characterized by using UV-Visible, Particle Size Analyzer, Zeta sizer, X-Ray Diffraction, Fourier Transform Infrared Spectroscopy and Transmission Electron Microscopy. UV-Visible spectroscopy confirmed that synthesized ZnONCs are optically active. PSA and Zeta potential confirmed that crystals are in nanorange and highly electro catalytic. The crystallinity of ZnONCs confirmed using XRD in which peaks were in accordance with JCPDS data. Various functional groups and bonds present in nanocrystal investigated using FTIR, which are responsible for successful adsorption of Pb metal ions on surface. TEM analysis confirmed actual size of nanocrystals and their shape. Adsorption isotherms and kinetic studies demonstrated the capability of nanocrystals for removal of heavy metal containment from wastewater. Thermodynamic studies represented feasibility of spontaneous reaction during removal of metallic ions and the occupied active sites of ZnONCs reactivated using HCl. These nanocrystals can be used in biosensors, as they possess high electron transfer capability that helps in detection of various compounds.
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