Putra, Giovan Augusta (2026) Pengaruh Komposisi TiO2 Terhadap Sifat Fotokatalitik Komposit Fe3O4/TiO2 Berbasis Sintesis Hijau Fe3O4 dengan Ekstrak Moringa Oleifera untuk Fotodegradasi Methyl Violet. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Fotokatalis merupakan metode pengolahan limbah cair dengan memanfaatkan energi cahaya untuk menghasilkan radikal hidroksil yang mampu mendegradasi senyawa organik. Metode konvensional umumnya menggunakan bahan kimia sintetis sebagai agen pereduksi dan pengendap, sehingga berpotensi menimbulkan limbah berbahaya, proses kompleks, serta waktu sintesis yang lama. Sebagai alternatif, pendekatan green synthesis dipilih karena memanfaatkan bahan alami yang lebih ramah lingkungan dan memiliki keefektifan yang tinggi untuk mensintesis material dikarenakan memiliki senyawa seperti flavonoid, polifenol, dan fenol sebagai agen penstabil alami. Penelitian ini mengusulkan pengembangan sintesis Fe3O4 melalui metode green synthesis menggunakan ekstrak daun Moringa oleifera sebagai agen pereduksi dan penstabil serta mengkompositkan magnetik Fe₃O₄/TiO₂. Tiga rasio Fe₃O₄:TTIP (0.5 : 1.8, 0.5 : 3.23, dan 0.5 : 4.15) disintesis melalui metode kopresipitasi untuk inti Fe₃O₄ yang dilapisi TiO₂ dengan prekursor Titanium (IV) isopropoxide (TTIP). Karakterisasi material meliputi XRD untuk fase kristalin, SEM-EDS untuk morfologi dan komposisi, FTIR untuk identifikasi gugus fungsi, serta UV-Vis untuk analisis band gap. Uji fotokatalitik dilakukan terhadap degradasi Methyl Violet di bawah radiasi UV, termasuk evaluasi stabilitas dan daur ulang melalui pemisahan magnetik. Penelitian ini menghasilkan kesimpulan bahwa penggunaan komposit Fe3O4 b/TTIP 0.5 : 3.23 merupakan komposisi terbaik serta stabil dalam aktivitas fotokatalik degradasi warna limbah Metyhl Violet dengan memberikan persentase degradasi limbah sebesar 88.117%, 97.884%, dan 97.179% setelah penyinaran selama 60 menit. Hasil pengujian fotokatalitik penelitian ini mampu membuktikan sintesis ramah lingkungan mampu menghasilkan hasil aktivitas fotokatalik yang efisien dan mampu diterapkan jangka panjang.
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Photocatalysis is a method of treating liquid waste by utilizing light energy to produce hydroxyl radicals that can degrade organic compounds. Conventional methods generally use synthetic chemicals as reducing and precipitating agents, which can potentially produce hazardous waste, involve complex processes, and require long synthesis times. As an alternative, the green synthesis approach was chosen because it utilizes natural materials that are more environmentally friendly and highly effective for synthesizing materials due to their flavonoid, polyphenol, and phenol compounds as natural stabilizing agents. This study proposes the development of Fe3O4 synthesis through a green synthesis method using Moringa oleifera leaf extract as a reducing and stabilizing agent and compositing Fe₃O₄/TiO₂ magnetics. Three Fe₃O₄:TTIP ratios (0.5:1.8, 0.5:3.23, and 0.5:4.15) were synthesized through the coprecipitation method for Fe₃O₄ cores coated with TiO₂ using Titanium (IV) isopropoxide (TTIP) as a precursor. Material characterization included XRD for crystalline phases, SEM-EDS for morphology and composition, FTIR for functional group identification, and UV-Vis for band gap analysis. Photocatalytic testing was conducted on the degradation of Methyl Violet under UV radiation, including evaluation of stability and recycling through magnetic separation. This study concluded that the use of Fe3O4 b/TTIP 0.5 : 3.23 composite is the best composition and is stable in the photocatalytic activity of Methyl Violet waste color degradation, providing a waste degradation percentage of 88.117%, 97.884%, and 97.179% after 60 minutes of irradiation. The results of this photocatalytic testing prove that environmentally friendly synthesis can produce efficient photocatalytic activity and can be applied in the long term.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Fotokatalis, Fe3O4/TiO2, Moringa oleifera, Green Synthesis, Methyl Violet, Photocatalysis, Fe3O4/TiO2, Moringa oleifera, Green Synthesis, Methyl Violet |
| Subjects: | Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis Q Science > QD Chemistry > QD716 Photocatalysis. T Technology > TP Chemical technology T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Giovan Augusta Putra |
| Date Deposited: | 22 Jan 2026 10:11 |
| Last Modified: | 22 Jan 2026 10:11 |
| URI: | http://repository.its.ac.id/id/eprint/130015 |
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