MAHARANI, RIVIA (2025) PENGARUH KONSENTRASI AWAL METILEN BIRU TERHADAP EFISIENSI DEGRADASI METILEN BIRU OLEH FOTOKATALIS Fe3O4@PEG:ZnO. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
In this study, Fe3O4@PEG:ZnO catalyst was synthesized using coprecipitation method with variation of ZnO mass ratio (1:1) and (1:2). This study aims to determine the effect of ZnO mass addition on Fe3O4@PEG:ZnO nanoparticles, initial concentration of methylene blue and irradiation time on methylene blue dye photocatalyst activity. X-Ray Diffraction (XRD) analysis showed that the crystal sizes of Fe3O4@PEG:ZnO (1:1) and (1:2) were 6.014 nm and 6.012 nm, with cubic crystal structure for Fe3O4 and hexagonal for ZnO. The lattice parameter for Fe3O4 phase is 8.16 Å, while for ZnO phase it is 3.61 Å. Fourier Transform Infra Red (FTIR) Spectrum analysis showed the presence of new functional groups in the sample after the addition of ZnO, namely -OH, C-H, and Zn-O bonds. Vibrating Sample Magnetometer (VSM) results show a decrease in saturation magnetization and remanent magnetization values, as well as an increase in coercive field values. Transmission Electron Microscopy (TEM) characterization results show results that are in accordance with XRD data. UV-Visible Spectrophotometer characterization results show that the energy gap values of Fe3O4@PEG:ZnO (1:1) and (1:2) are 2.66 and 2.38 eV, respectively. Photocatalyst activity test showed that the most optimal methylene blue degradation efficiency at 180th minute for Fe3O4@PEG:ZnO (1:2) sample with initial methylene blue concentration of 5 ppm, which is 49.7%.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Pada penelitian ini, katalis Fe3O4@PEG:ZnO disintesis menggunakan metode kopresipitasi dengan variasi perbandingan massa ZnO (1:1) dan (1:2). Penelitian ini bertujuan untuk mengetahui pengaruh penambahan massa ZnO pada nanopartikel Fe3O4@PEG:ZnO, konsentrasi awal metilen biru serta waktu iradiasi terhadap aktivitas fotokatalis zat warna metilen biru. Hasil analisis X-Ray Diffraction (XRD) menunjukkan bahwa ukuran kristal Fe3O4@PEG:ZnO (1:1) dan (1:2) sebesar 6,014 nm dan 6,012 nm, dengan struktur kristal berbentuk cubic untuk Fe3O4 dan hexagonal untuk ZnO. Parameter kisi untuk fasa Fe3O4 adalah 8,16 Å, sedangkan untuk fasa ZnO sebesar 3,61 Å. Analisis Spektrum Fourier Transform Infra Red menunjukkan adanya gugus fungsi baru pada sampel setelah penambahan ZnO, yaitu ikatan -OH, C-H, dan Zn-O. Hasil Vibrating Sample Magnetometer menunjukkan adanya penurunan nilai magnetisasi saturasi dan magnetisasi remanen, serta peningkatan nilai medan koersif. Hasil karakterisasi Transmission Electron Microscopy menunjukkan hasil yang sesuai dengan data XRD. Hasil karakterisasi Spektrofotometer UV-Visible menunjukkan bahwa nilai energi gap Fe3O4@PEG:ZnO (1:1) dan (1:2) masing-masing adalah 2,66 eV dan 2,38 eV. Uji aktivitas fotokatalis menunjukkan bahwa efisiensi degradasi metilen biru yang paling optimal pada menit ke-180 untuk sampel Fe3O4@PEG:ZnO (1:2) dengan konsentrasi awal metilen biru sebesar 5 ppm, yaitu sebesar 49,7%. | |||||||||
| Uncontrolled Keywords: | Fe3O4@PEG:ZnO photocatalyst, initial concentration, methylene blue. Fotokatalis Fe3O4@PEG:ZnO, konsentrasi awal, metilen biru. | |||||||||
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
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| Divisions: | 02-Fakultas Keguruan dan Ilmu Pendidikan > 84203-Jurusan Pendidikan Fisika 02-Fakultas Keguruan dan Ilmu Pendidikan |
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| Depositing User: | Rivia Maharani | |||||||||
| Date Deposited: | 26 May 2025 02:53 | |||||||||
| Last Modified: | 26 May 2025 02:53 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/48143 |
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