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High Efficient Photocatalytic Degradation of Methyl Orange Dye in an Aqueous Solution by CoFe2O4-SiO2-TiO2 Magnetic Catalyst
 
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1
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jalan Palembang-Prabumulih, Indralaya, Ogan Ilir, Indonesia
2
Department of Biology, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jalan Palembang-Prabumulih, Indralaya, Ogan Ilir, Indonesia
3
Doctoral Program of Environmental Science, Graduate School, Sriwijaya University, Jalan Padang Selasa 524 Bukit Besar, Palembang 30139, South Sumatra, Indonesia
CORRESPONDING AUTHOR
Poedji Loekitowati Hariani   

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jalan Palembang-Prabumulih, Indralaya, Ogan Ilir, Indonesia
Publication date: 2022-01-01
 
J. Ecol. Eng. 2022; 23(1):118–128
 
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ABSTRACT
This study successfully synthesized a core-shell-shell in the form of CoFe2O4-SiO2-TiO2 catalyst magnetic and recyclable. The catalyst for the photocatalytic degradation of methyl orange (MO) dye. Subsequently, the catalyst was subjected to XRD, FTIR, SEM-EDS, VSM, as well as UV-DRS characterizations. The photocatalytic degradation was studied as a function of the solution pH, MO concentration, and irradiation time, while the kinetics of photocatalytic degradation and the catalyst’s reusability were also evaluated. Based on the XRD, FTIR, and SEM-EDS characterizations, CoFe2O4 coating was successfully carried out using SiO2 and TiO2. CoFe2O4-SiO2-TiO2 was discovered to possess magnetic properties with a saturation magnetization of 17.59 emu/g and a bandgap value of 2.4 eV. The photocatalytic degradation of MO followed the Langmuir-Hishelwood model. The optimum degradation was obtained at MO concentration of 25 mg/L, solution pH of 4, catalyst dose of 0.05 g/L, irradiation time of 160 minutes, MO removal efficiency achieved 93.46 %. The regeneration study showed CoFe2O4-SiO2-TiO2 after 5 cycles were able to catalyze the photocatalytic degradation with an MO removal efficiency of 89.96%.