Belinda, Averina (2026) Analisis Pengaruh Variasi Penambahan Massa DBE Pada Material Komposit Semikonduktor DBE/Co₃O₄/ZnO Sebagai Material Fotokatalis Degradasi Limbah Methylene Blue. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Limbah zat warna methylene blue (MB) merupakan salah satu pencemar yang sulit terdegradasi secara alami sehingga diperlukan metode pengolahan yang efektif, salah satunya melalui fotokatalisis. Penelitian ini bertujuan untuk mengetahui pengaruh variasi penambahan de-oiled bleaching earth (DBE) terhadap karakteristik dan aktivitas fotodegradasi komposit DBE/ZnO/Co₃O₄ dalam degradasi methylene blue. Komposit disintesis dengan variasi DBE sebesar 0%, 5%, 10%, 15%, dan 20%, kemudian dikarakterisasi menggunakan XRD, FTIR, SEM-EDX, BET, dan UV-Vis. Aktivitas fotodegradasi diuji terhadap larutan methylene blue 10 ppm di bawah penyinaran sinar UV selama 150 menit. Hasil karakterisasi XRD menunjukkan bahwa komposit berhasil terbentuk tanpa menghasilkan fase pengotor baru. Karakterisasi FTIR mengonfirmasi keberadaan gugus fungsi penyusun komposit, sedangkan hasil BET menunjukkan bahwa seluruh sampel memiliki struktur mesopori dengan luas permukaan spesifik terendah sebesar 55,45 m²/g pada sampel DZCO 20%. Hasil pengujian fotodegradasi menunjukkan bahwa komposit DZCO 5% memiliki aktivitas fotodegradasi terbaik dengan persentase degradasi methylene blue sebesar 96,74% dan sesuai dengan kinetika orde nol (zero order) dengan nilai R2 sebesar 0,717.
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Methylene blue (MB) dye wastewater is one of the pollutants that is difficult to degrade naturally, necessitating the development of effective treatment methods, one of which is photocatalysis. This study aimed to investigate the effect of varying the amount of de-oiled bleaching earth (DBE) on the characteristics and photocatalytic activity of DBE/ZnO/Co₃O₄ composites for the degradation of methylene blue. The composites were synthesized with DBE contents of 0%, 5%, 10%, 15%, and 20%, and subsequently characterized using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), Brunauer–Emmett–Teller (BET), and UV-Vis (UV-Vis). The photocatalytic activity was evaluated using a 10 ppm methylene blue solution under UV irradiation for 150 minutes. The XRD results confirmed the successful formation of the composite without the presence of additional impurity phases. FTIR analysis verified the characteristic functional groups of the composite, while BET analysis revealed that all samples exhibited a mesoporous structure, with the lowest specific surface area of 55.454 m²/g obtained by the DZCO 20% sample. The photocatalytic performance demonstrated that the DZCO 5% composite exhibited the highest photocatalytic activity, achieving a methylene blue degradation efficiency of 96.74% and followed zero-order kinetics, with an R² value of 0.717.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | de-oiled bleaching earth, ZnO, Co₃O₄, fotokatalisis, methylene blue. ======================================================================================================================== de-oiled bleaching earth, ZnO, Co₃O₄, photocatalysis, methylene blue. |
| Subjects: | Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry > QD501 Catalysis. Catalysts. Q Science > QD Chemistry > QD716 Photocatalysis. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Averina Belinda |
| Date Deposited: | 24 Jul 2026 06:10 |
| Last Modified: | 24 Jul 2026 06:10 |
| URI: | http://repository.its.ac.id/id/eprint/137102 |
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