Dominicus, Enos (2026) Analisis Pengaruh Variasi Komposisi CuO dan Biochar Kulit Kacang Tanah (Arachis Hypogaea L) terhadap Performa Fotokatalis Komposit ZnO/CuO/Biochar untuk Degradasi Methyl Violet. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Limbah cair industri tekstil yang mengandung zat warna Methyl violet sulit terurai secara alami sehingga memerlukan metode pengolahan yang efektif, salah satunya melalui proses fotokatalisis. ZnO memiliki potensi sebagai material fotokatalis, tetapi masih memiliki keterbatasan berupa energi celah pita (band gap) yang relatif lebar dan laju rekombinasi elektron-hole yang tinggi. Untuk mengatasi keterbatasan tersebut, penambahan CuO dilakukan untuk membentuk heterojunction p-n yang dapat membantu pemisahan muatan, sedangkan biochar kulit kacang tanah (Arachis hypogaea L.) digunakan sebagai material pendukung yang dapat membantu mengurangi aglomerasi dan berperan sebagai electron sink. Penelitian ini bertujuan untuk mensintesis dan menganalisis pengaruh variasi komposisi CuO dan biochar terhadap karakteristik dan aktivitas fotokatalitik komposit ZnO/CuO/biochar. Komposit ZnO/CuO disintesis dengan metode kopresipitasi menggunakan variasi rasio ZnO:CuO sebesar 1:0,5; 1:1; dan 1:1,5, kemudian dikompositkan dengan biochar hasil pirolisis sebanyak 5%, 10%, dan 15%. Aktivitas fotokatalitik dievaluasi melalui degradasi Methyl violet di bawah penyinaran sinar UV selama 120 menit. Di antara komposit ZnO/CuO tanpa biochar, rasio 1:1 memberikan efisiensi tertinggi sebesar 97,462%, dibandingkan rasio 1:0,5 sebesar 81,153% dan rasio 1:1,5 sebesar 81,235%. Penambahan biochar pada rasio ZnO:CuO 1:1 meningkatkan efisiensi hingga mencapai nilai tertinggi sebesar 99,357% pada komposisi biochar 15%, dengan konsentrasi akhir Methyl violet sebesar 0,064 ppm.
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Industrial wastewater from the textile industry containing the dye Methyl violet is difficult to degrade naturally, thus requiring effective treatment methods, one of which is photocatalysis. ZnO has potential as a photocatalyst, but it still has limitations in the form of a relatively wide band gap and a high electron-hole recombination rate. To overcome these limitations, CuO was added to form a p-n heterojunction that can aid in charge separation, while peanut shell (Arachis hypogaea L.) biochar was used as a support material to help reduce agglomeration and act as an electron sink. This study aims to synthesize and analyze the effect of variations in CuO and biochar composition on the characteristics and photocatalytic activity of ZnO/CuO/biochar composites. The ZnO/CuO composites were synthesized via the coprecipitation method using varying ZnO:CuO ratios of 1:0.5, 1:1, and 1:1.5, and then composite with pyrolyzed biochar at 5%, 10%, and 15% by weight. Photocatalytic activity was evaluated by the degradation of Methyl violet under UV irradiation for 120 minutes. Among the ZnO/CuO composites without biochar, the 1:1 ratio yielded the highest efficiency of 97.462%, compared to 81.153% for the 1:0.5 ratio and 81.235% for the 1:1.5 ratio. The addition of biochar to the 1:1 ZnO:CuO ratio increased the efficiency to a maximum of 99.357% at a biochar content of 15%, with a final Methyl violet concentration of 0.064 ppm.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Biochar, ZnO/CuO, Fotokatalis, Kulit Kacang Tanah, Methyl Violet, Biochar, ZnO/CuO, Methyl Violet, Peanut Shells, Photocatalyst. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry > QD716 Photocatalysis. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Enos Dominicus |
| Date Deposited: | 24 Jul 2026 01:24 |
| Last Modified: | 24 Jul 2026 01:24 |
| URI: | http://repository.its.ac.id/id/eprint/136631 |
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