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- Title
Synthesis of NiFe<sub>2</sub>O<sub>4</sub>/SiO<sub>2</sub>/NiO Magnetic and Application for the Photocatalytic Degradation of Methyl Orange Dye under UV Irradiation.
- Authors
Hariani, Poedji Loekitowati; Said, Muhammad; Rachmat, Addy; Salni, S.; Aprianti, Nabila; Amatullah, Anisa Fitri
- Abstract
NiFe2O4/SiO2/NiO magnetic was successfully synthesized using NiFe2O4, SiO2, and NiO as the core, interlayer, and shell, respectively. NiFe2O4/SiO2/NiO under UV light irradiation was used for photocatalytic degradation of methyl orange dye with different pH, catalyst dose, and initial dye concentration. This composite was characterized by Xray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy-Electron Dispersive Xray Spectroscopy (SEM-EDs), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). The results showed that the composite is a superparamagnetic material with a saturation magnetization value of 44.13 emu/g. It also has a band gap of 2.67 eV with a pHpzc of 6.33. The optimum conditions for photocatalytic degradation were at pH of 4; 0.50 g/L catalyst dose, and 10 mg/L initial concentration. NiFe2O4/SiO2/NiO degradation efficiency to methyl orange dye was 95.76%. The photocatalytic degradation in different concentrations follows the pseudo-first-order, where the greater the concentration, the smaller the constant rate (k). After five cycles of repeated usage, NiFe2O4/SiO2/NiO has good catalytic performance as well as efficient and favourable of a recyclable photocatalyst.
- Subjects
IRRADIATION; PHOTODEGRADATION; MAGNETICS; POINTS of zero charge; SUPERPARAMAGNETIC materials; REFLECTANCE spectroscopy
- Publication
Bulletin of Chemical Reaction Engineering & Catalysis, 2022, Vol 17, Issue 4, p699
- ISSN
1978-2993
- Publication type
Article
- DOI
10.9767/bcrec.17.4.15788.699-711