title: Selective divalent cobalt ions detection using Ag2O3-ZnO nanocones by ICP-OES method for environmental remediation.
abstract: Here, we have synthesized Ag2O3-ZnO nanocones (NCs) by a wet-chemical route using reducing agents at low temperature. The structural, optical and morphological properties of Ag2O3-ZnO NCs were investigated by several conventional techniques such as powder XRD, XPS, FESEM, XEDS, FTIR and UV/vis. spectroscopy. The analytical parameters of prepared NCs were also calculated for a selective detection of divalent cobalt [Co(II)] prior to its determination by inductively coupled plasma-optical emission spectrometry (ICP-OES). The selectivity of NCs toward various metal ions, including Cd(II), Co(II), Cr(III), Cu(II), Fe(III), Ni(II), and Zn(II) was studied. Results of the selectivity study demonstrated that Ag2O3-ZnO NC phase was the most selective towards Co(II) ion. The uptake capacity for Co(II) ion was experimentally calculated to be ∼76.69 mgg-1. Moreover, adsorption isotherm data provided that the adsorption process was mainly monolayer on homogeneous adsorbent surfaces of Ag2O3-ZnO NCs. Kinetic study revealed that the adsorption of Co(II) on Ag2O3-ZnO NCs phase followed the pseudo-second-order kinetic model. In addition, thermodynamic results provided that the adsorption mechanism of Co(II) ions on Ag2O3-ZnO NCs was a spontaneous process and thermodynamically favorable. Finally, the proposed method was validated by applying it to real environmental water samples with reasonable results.
authors.affiliation: Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, Saudi Arabia; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Mohammed M
authors.initials: MM
authors.lastname: Rahman
authors.affiliation: Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, Saudi Arabia; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Sher Bahadar
authors.initials: SB
authors.lastname: Khan
authors.affiliation: Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, Saudi Arabia; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Hadi M
authors.initials: HM
authors.lastname: Marwani
authors.affiliation: Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, Saudi Arabia; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
mesh_terms: D000327:Adsorption; D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization; D052918:Environmental Restoration and Remediation; D049329:Nanostructures / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D010087:Oxides; D018030:Silver Compounds; D014874:Water Pollutants, Chemical; D003035:Cobalt; C040225:disilver oxide; D015034:Zinc Oxide