Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals.

Content Provider	Europe PMC
Author	Iqbal, Zafar Tanweer, Mohd Saquib Alam, Masood
Copyright Year	2023
Abstract	This work is dedicatedto the synthesis, characterization,andadsorption performance of reduced graphene oxide-modified spinel cobaltferrite nanoparticles. The as-synthesized reduced graphene oxide cobaltferrite (RGCF) nanocomposite has been characterized using FTIR spectroscopy,FESEM coupled with EDXS, XRD, HRTEM, zeta potential, and vibratingsample magnetometer (VSM) measurements. FESEM proves the particlesize in the range of 10 nm. FESEM, EDX, TEM, FTIR, and XPS analysesprovide the proof of successful incorporation of rGO sheets with cobaltferrite nanoparticles. The crystallinity and spinel phase of cobaltferrite nanoparticles have been shown by XRD results. The saturationmagnetization (Ms) was measured as 23.62emu/g, proving the superparamagnetic behavior of RGCF. The adsorptionabilities of the synthesized nanocomposite have been tested usingcationic crystal violet (CV) and brilliant green (BG) and anionicmethyl orange (MO) and Congo red (CR) dyes. The adsorption trend forMO, CR, BG, and As(V) follows RGCF > rGO > CF at neutral pH.Adsorptionstudies have been accomplished by optimizing parameters like pH (2–8),adsorbent dose (1–3 mg/25 mL), initial concentration (10–200mg/L), and contact time at constant room temperature (RT). To further investigate the sorption behavior, isotherm, kinetics,and thermodynamic studies have been conducted. Langmuir isotherm andpseudo-second-order kinetic models suited better for the adsorptionof dyes and heavy metals. The maximum adsorption capacities (qm) obtained have been found as 1666.7, 1000,416.6, and 222.2 mg/g for MO, CR, BG, and As, respectively, with operationalparameters such as T = 298.15 K; RGCF dose: 1 mgfor MO and 1.5 mg each for CR, BG, and As. Thus, the RGCF nanocompositewas found to be an excellent adsorbent for the removal of dyes andheavy metals.
Journal	ACS Omega
Volume Number	8
PubMed Central reference number	PMC9948210
Issue Number	7
PubMed reference number	36844590
e-ISSN	24701343
DOI	10.1021/acsomega.2c06636
Language	English
Publisher	American Chemical Society
Publisher Date	2023-02-13
Access Restriction	Open
Rights License	Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). © 2023 The Authors. Published by American Chemical Society
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering