Amalia, Kinanta Rahma (2025) Pengaruh Perlakuan Suhu Aktivasi Terhadap Karakterisasi Elektrokimia Karbon Aktif Dari Arang Tempurung Kemiri Untuk Elektroda Capacitive Deionization (CDI). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Krisis air bersih akibat pencemaran dan perubahan iklim mendorong pengembangan teknologi pemurnian air yang efisien dan ramah lingkungan. Salah satu teknologi yang menjanjikan adalah Capacitive Deionization (CDI), yang menggunakan elektroda karbon aktif untuk menyerap ion-ion terlarut melalui proses elektrosorpsi. Penelitian ini bertujuan untuk mengkaji pengaruh variasi suhu aktivasi terhadap struktur kimia, konduktivitas, dan sifat elektrokimia karbon aktif dari arang tempurung kemiri, serta menentukan suhu optimal untuk aplikasi elektroda CDI. Proses aktivasi dilakukan pada suhu 300°C, 500°C, dan 700°C, dengan satu sampel tanpa perlakuan sebagai pembanding. Karakterisasi meliputi Fourier Transform Infrared Spectroscopy (FTIR), uji konduktivitas, Cyclic Voltammetry (CV), dan Electrochemical Impedance Spectroscopy (EIS). Hasil menunjukkan bahwa suhu aktivasi memengaruhi komposisi gugus fungsi, struktur pori, dan jalur transport ion. Suhu 500°C menghasilkan kapasitansi spesifik tertinggi sebesar 31,4 F/g dan koefisien difusi ion Na⁺ sebesar 6,03 × 10⁻¹³ cm²/s, menandakan performa elektrokimia yang paling optimal. Meskipun karbon tanpa perlakuan mencatat konduktivitas tertinggi (359 µS/cm), performa keseluruhan terbaik dicapai pada suhu aktivasi menengah. Dengan demikian, suhu 500°C direkomendasikan sebagai kondisi aktivasi optimal untuk menghasilkan karbon aktif berbasis tempurung kemiri sebagai elektroda CDI. Penelitian ini sekaligus menunjukkan potensi pemanfaatan limbah biomassa lokal sebagai solusi inovatif dalam pengolahan air berkelanjutan.
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The global clean water crisis caused by pollution and climate change has driven the development of efficient and environmentally friendly water purification technologies. One promising method is Capacitive Deionization (CDI), which uses activated carbon electrodes to adsorb dissolved ions through electrosorption. This study aims to investigate the effect of activation temperature variation on the chemical structure, conductivity, and electrochemical properties of activated carbon derived from candlenut shell charcoal, as well as to determine the optimal temperature for CDI electrode applications. The activation process was carried out at 300°C, 500°C, and 700°C, with one untreated sample used as a control. Characterization techniques included Fourier Transform Infrared Spectroscopy (FTIR), conductivity measurement, Cyclic Voltammetry (CV), and Electrochemical Impedance Spectroscopy (EIS). The results showed that activation temperature significantly affects functional group composition, pore structure, and ion transport pathways. Activation at 500°C produced the highest specific capacitance of 31.4 F/g and the highest sodium ion diffusion coefficient of 6.03 × 10⁻¹³ cm²/s, indicating the most optimal electrochemical performance. Although the untreated sample recorded the highest conductivity (359 µS/cm), overall performance was best achieved at the intermediate activation temperature. Therefore, 500°C is recommended as the optimal activation condition for producing candlenut shell-based activated carbon electrodes for CDI systems. This research also highlights the potential of utilizing local biomass waste as an innovative solution for sustainable water treatment.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | arang tempurung kemiri, capacitive deionization (CDI), elektroda, karbon aktif, sifat elektrokimia. ; candlenut shell charcoal, capacitive deionization (CDI), electrode, activated carbon, electrochemical properties. |
| Subjects: | Q Science > QC Physics > QC610.3 Electric conductivity Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Kinanta Rahma Amalia |
| Date Deposited: | 30 Jul 2025 03:17 |
| Last Modified: | 30 Jul 2025 03:17 |
| URI: | http://repository.its.ac.id/id/eprint/123327 |
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