Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red

Abstract

NiFe2O4 nanoparticles had been successfully synthesized by solution combustion method using urea fuel (organic precursor). The synthesized NiFe2O4 were characterized by X-ray diffraction (XRD), Scanning electron microscopy-Electron Dispersive X-ray Spectroscopy (SEM-EDs), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red (FTIR), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). NiFe2O4 nanoparticles irradiated with visible light were employed to degrade Congo red dye with the following variable: solution pH (3–8), H2O2 concentration (0.5–3 mM), and Congo red concentration (100–600 mg/L). XRD analysis results showed that the NiFe2O4 nanoparticles had a cubic spinel structure. The particle sizes are in the range of 10–40 nm. The magnetic properties of NiFe2O4 nanoparticles determined using VSM showed a magnetization saturation value of 47.32 emu/g. UV-Vis DRS analysis indicated that NiFe2O4 nanoparticles had an optical band gap of 1.97 eV. The success of synthesis was also proven by the EDS analysis results, which showed that the synthesized NiFe2O4 nanoparticles composed of Ni, Fe, and O elements. The removal efficiency of Congo red dye was 96.80% at the following optimum conditions: solution pH of 5.0, H2O2 concentration of 2 mM, Congo red dye concentration of 100 mg/L, and contact time of 60 min. The study of the photodegradation kinetics follows a pseudo-first order reaction with a rate constant value of 0.0853 min−1. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Synthesis of Fe3O4/SiO2/NiO magnetic composite: Evaluation of its catalytic activity for methylene blue degradation

“…Another research showed that NiO and Fe3O4 were observed at 330 nm and 440 nm, respectively (Barzinjy et al, 2020). In this research, the Fe3O4/SiO2/NiO band gap was 2.83 eV, which is smaller than the band gap of NiO ~ 3.5 eV and larger than the band gap of ferrite compounds ~ 2 eV (Hariani et al, 2021).…”

“…Figure 2 shows the FTIR spectra of Fe3O4, Fe3O4/SiO2, and Fe3O4/SiO2/NiO. The wave numbers between 3400 cm -1 and 1600 cm -1 appear in all peaks, indicating the presence of O-H groups from free water, which is absorbed by the catalyst (Hariani et al, 2021;Elzahrani 2017;Ojemaye et al, 2017). In Figure 2(a), Fe-O stretching vibration is observed at a wave of 557.43 cm -1 .…”

“…The hydroxyl and superoxide radicals degrade dye into smaller non-toxic compounds, CO2 and H2O (Gao et al, 2013;Salomon et al, 2012). The several semiconductor materials used include TiO2 (Hou et al, 2018), NiFe2O4 (Hariani et al, 2021), NiO (Lett et al, 2022), ZnO (Chen et al, 2017), and CoFe2O4 (Loan et al, 2019).…”

Synthesis of NiFe2O4/SiO2/NiO Magnetic and Application for the Photocatalytic Degradation of Methyl Orange Dye under UV Irradiation

“…This The magnetic properties of NiFe2O4, NiFe2O4/SiO2, and NiFe2O4/SiO2/NiO are presented in Figure 5. NiFe2O4 has a saturation magnetization value of 50.37 emu/g, which was greater than the value obtained after synthesis using solution combustion of 47.32 emu/g [42]. The bulk saturation value was 56 emu/g [43].…”

Anion Exchange Membrane Water Electrolysis Based on Nickel Ferrite Catalysts

“…[39][40][41] As for the conventional liquid electrolysis, catalysts are based on non-PGMs. In particular, spinel-type catalysts are often used due to easy synthesis methodologies: solid phase method, [42][43][44][45] in the vapor phase [46] or still in the liquid phase employing, for example, hydrothermal synthesis, sol-gel, precipitation, or electrodeposition, allowing to choose from a large variety of inexpensive reagents, producing catalysts with high activity for oxygen evolution reaction and capable of showing good stability in an alkaline environment.…”