Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters
Background and purpose: Photocatalysis process with TiO2 is a well-known method for removal of pollutants from water. However, the small particle size of TiO2, and therefore difficulty in its separation after treatment impede its commercialization. The aim of this study was to synthetize the Fe3O4@S...
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| Format: | Article |
| Language: | English |
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Mazandaran University of Medical Sciences
2018-04-01
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| Series: | Journal of Mazandaran University of Medical Sciences |
| Subjects: | |
| Online Access: | http://jmums.mazums.ac.ir/article-1-10210-en.html |
| _version_ | 1828054856998322176 |
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| author | Ali Esrafili Saeedeh Khosravi Mitra Gholami Mahdi Farzadkia Ghadir Abdorahimi |
| author_facet | Ali Esrafili Saeedeh Khosravi Mitra Gholami Mahdi Farzadkia Ghadir Abdorahimi |
| author_sort | Ali Esrafili |
| collection | DOAJ |
| description | Background and purpose: Photocatalysis process with TiO2 is a well-known method for removal of pollutants from water. However, the small particle size of TiO2, and therefore difficulty in its separation after treatment impede its commercialization. The aim of this study was to synthetize the Fe3O4@SiO2@TiO2 magnetic nanoparticles (NPs) and evaluation of its efficiency in removal of metronidazole (MNZ) from aqueous solutions.
Materials and methods: The NPs were synthetized via sol-gel method, and characterized using SEM, XRD, VSM, and BET analysis. Then, the effect of operational parameters, including catalyst dosage, pH, and initial concentration of MNZ on removal efficiency were examined. The order of reaction and kinetic model, as well as the reusability potential of the catalyst were all investigated in the optimum run. Finally, comparison was made between the adsorption, direct photolysis, application of commercial Degussa P25 TiO2 (p25), and Fe3O4@SiO2@TiO2 NPs.
Results: The so-synthesized catalyst showed good superparamagnetic properties. The optimum conditions for the MNZ removal were pH=8, the catalyst dosage=1.5 g/L, and initial concentration of MNZ=40 mg/L under 180 min UV irradiation time. The kinetic study revealed that the photocatalytic degradation of MNZ followed the pseudo- first order (R2= 0.9912) and the Langmuir-Hinshelwood model (R2= 0.9976).
Conclusion: According to the results, the Fe3O4@SiO2@TiO2 NPs were almost as effective as commercial catalyst Degussa P25 TiO2 in removal of MNZ (P> 0.05). Due to the simple separation with external magnetic field and reusability potential, Fe3O4@SiO2@TiO2 NPs can be considered as a suitable alternative for Degussa P25 TiO2. |
| first_indexed | 2024-04-10T20:29:34Z |
| format | Article |
| id | doaj.art-6e8a4ef8bba2401fb4ba6f617447612c |
| institution | Directory Open Access Journal |
| issn | 1735-9260 1735-9279 |
| language | English |
| last_indexed | 2024-04-10T20:29:34Z |
| publishDate | 2018-04-01 |
| publisher | Mazandaran University of Medical Sciences |
| record_format | Article |
| series | Journal of Mazandaran University of Medical Sciences |
| spelling | doaj.art-6e8a4ef8bba2401fb4ba6f617447612c2023-01-25T07:35:55ZengMazandaran University of Medical SciencesJournal of Mazandaran University of Medical Sciences1735-92601735-92792018-04-012815997115Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational ParametersAli Esrafili0Saeedeh Khosravi1Mitra Gholami2Mahdi Farzadkia3Ghadir Abdorahimi4 Associate Professor, Research Center for Environmental Health Technology, School of Public Health, Iran University of Medical Sciences, Tehran, Iran MSc Student in Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Professor, Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran Professor, Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran MSc Student in Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Background and purpose: Photocatalysis process with TiO2 is a well-known method for removal of pollutants from water. However, the small particle size of TiO2, and therefore difficulty in its separation after treatment impede its commercialization. The aim of this study was to synthetize the Fe3O4@SiO2@TiO2 magnetic nanoparticles (NPs) and evaluation of its efficiency in removal of metronidazole (MNZ) from aqueous solutions. Materials and methods: The NPs were synthetized via sol-gel method, and characterized using SEM, XRD, VSM, and BET analysis. Then, the effect of operational parameters, including catalyst dosage, pH, and initial concentration of MNZ on removal efficiency were examined. The order of reaction and kinetic model, as well as the reusability potential of the catalyst were all investigated in the optimum run. Finally, comparison was made between the adsorption, direct photolysis, application of commercial Degussa P25 TiO2 (p25), and Fe3O4@SiO2@TiO2 NPs. Results: The so-synthesized catalyst showed good superparamagnetic properties. The optimum conditions for the MNZ removal were pH=8, the catalyst dosage=1.5 g/L, and initial concentration of MNZ=40 mg/L under 180 min UV irradiation time. The kinetic study revealed that the photocatalytic degradation of MNZ followed the pseudo- first order (R2= 0.9912) and the Langmuir-Hinshelwood model (R2= 0.9976). Conclusion: According to the results, the Fe3O4@SiO2@TiO2 NPs were almost as effective as commercial catalyst Degussa P25 TiO2 in removal of MNZ (P> 0.05). Due to the simple separation with external magnetic field and reusability potential, Fe3O4@SiO2@TiO2 NPs can be considered as a suitable alternative for Degussa P25 TiO2.http://jmums.mazums.ac.ir/article-1-10210-en.htmlphotocatalysistitanium dioxidemagnetic nanoparticlesmetronidazole |
| spellingShingle | Ali Esrafili Saeedeh Khosravi Mitra Gholami Mahdi Farzadkia Ghadir Abdorahimi Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters Journal of Mazandaran University of Medical Sciences photocatalysis titanium dioxide magnetic nanoparticles metronidazole |
| title | Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters |
| title_full | Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters |
| title_fullStr | Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters |
| title_full_unstemmed | Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters |
| title_short | Photocatalytic Removal of Metronidazole Using Magnetic TiO2 Nanocatalyst (Fe3O4@SiO2@TiO2): Synthesis, Characterization, and Operational Parameters |
| title_sort | photocatalytic removal of metronidazole using magnetic tio2 nanocatalyst fe3o4 sio2 tio2 synthesis characterization and operational parameters |
| topic | photocatalysis titanium dioxide magnetic nanoparticles metronidazole |
| url | http://jmums.mazums.ac.ir/article-1-10210-en.html |
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