Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

Adewumi Oluwasogo Dada; Folahan Amoo Adekola; Ezekiel Oluyemi Odebunmi; Fehintoluwa Elizabeth Dada; Olugbenga Solomon Bello; Adeniyi Sunday Ogunlaja

doi:10.1016/j.mex.2020.100976

Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

MethodsX. 2020 Jun 25:7:100976. doi: 10.1016/j.mex.2020.100976. eCollection 2020.

Authors

Adewumi Oluwasogo Dada¹, Folahan Amoo Adekola², Ezekiel Oluyemi Odebunmi³, Fehintoluwa Elizabeth Dada⁴, Olugbenga Solomon Bello^{1

5}, Adeniyi Sunday Ogunlaja⁶

Affiliations

¹ Industrial Chemistry Programme, Department of Physical Sciences, Landmark University, PMB 1001, Omu Aran, Nigeria.
² Department of Industrial Chemistry, University of Ilorin, PMB 1515, Nigeria.
³ Department of Chemistry, University of Ilorin, PMB 1515, Nigeria.
⁴ Directorate of University Wide Courses, Landmark University, PMB 1001, Omu Aran, Nigeria.
⁵ Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, PMB 4000 Ogbomoso, Oyo, Nigeria.
⁶ Department of Chemistry, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth 6031, South Africa.

Abstract

Single pot system in chemical reduction via bottom-up approach was used for the synthesis of core shell nanoscale zerovalent iron (CS-nZVI). CS-nZVI was characterized by a combination of physicochemical and spectroscopic techniques. Data obtained showed BET surface area 20.8643 m²/g, t-Plot micropore volume 0.001895 cm³/g, BJH volume pores 0.115083 cm³/g, average pore width 186.9268 Å, average pore diameter 240.753 Å, PZC 5.24, and pH 6.80. Surface plasmon Resonance from UV-Vis spectrophotometer was observed at 340 nm. Surface morphology from SEM and TEM revealed a spherical cluster and chain-like nanostructure of size range 15.425 nm -97.566 nm. Energy Dispersive XRF revealed an elemental abundance of 96.05% core shell indicating the dominance of nZVI. EDX showed an intense peak of nZVI at 6.2 keV. FTIR data revealed the surface functional groups of Fe-O with characteristics peaks at 686.68 cm^-1, 569.02 cm^-1 and 434 cm^-1. In a batch technique, effective adsorption of endocrine disruptive Cu(II) ions was operational parameters dependent. Isotherm and kinetics studies were validated by statistical models. The study revealed unique characteristics of CS-nZVI and its efficacy in waste water treatment.

Keywords: Characterization; Core shell nZVI; Endocrine disruptive compounds; Isotherms; Kinetics; Morphology; Remediation; Statistical validity; Surface chemistry.