Albab, M. Zidane Fatuna (2026) Fabrikasi Screen Printed Carbon Electrode (SPCE) Berbasis Graphene Oxide (GO) Termodifikasi Material Heteroatom Nitrogen (N) Dan Sulfur (S) untuk Deteksi Logam Berat Pb Dan Cd pada Air Bersih. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini berfokus pada fabrikasi dan karakterisasi Screen Printed Carbon Electrode (SPCE) yang dimodifikasi dengan Graphene Oxide (GO) yang didoping atom heteroatom Nitrogen (N) dan Sulfur (S) untuk deteksi elektrokimia logam berat timbal (Pb) dan kadmium (Cd) pada air bersih. Penelitian ini didorong oleh urgensi pemantauan kualitas air di Indonesia, di mana tingkat pencemaran logam berat masih menjadi masalah serius yang memerlukan alat deteksi yang murah, portabel, dan akurat. Sintesis material modifikasi (N-rGO, S-rGO, dan N, S-rGO) berhasil dilakukan melalui metode hidrotermal dan sonikasi. Karakterisasi Fourier Transform Infrared (FTIR) mengonfirmasi keberhasilan sintesis dengan teridentifikasinya gugus fungsi –SCN, N–H, dan C–S yang berperan sebagai situs aktif untuk mengadsorpsi ion logam berat. Berdasarkan evaluasi elektrokimia, komposisi N1S3 (1 mmol nitrogen dan 100 mmol sulfur) ditetapkan sebagai variasi optimal dengan nilai resistansi transfer muatan (Rct) sebesar 3904 Ω dan kapasitansi lapisan ganda (Cdl) sebesar 811,68 μF. Pengujian performa dengan metode Differential Pulse Voltammetry (DPV) menunjukkan sensor N1S3 memiliki Limit of Detection (LOD) sebesar 1,735 mg.L-1 untuk Pb dan 1,152 mg.L-1 untuk Cd. Karakteristik dinamik yang diukur dengan metode Chronoamperometry menunjukkan waktu respon sebagai berikut 5,706 detik untuk Pb dan 7,21 detik untuk Cd. Meskipun sifat luas permukaan internal meningkat, penelitian ini mencatat bahwa adanya fenomena aglomerasi pada material modifikasi yang dapat menghambat arus faradaic, sehingga diperlukan optimisasi lebih lanjut untuk meningkatkan sensitivitas.
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This research focuses on the fabrication and characterization of Screen-Printed Carbon Electrodes (SPCE) modified with Graphene Oxide (GO) doped with Nitrogen (N) and Sulfur (S) heteroatoms for the electrochemical detection of heavy metals lead (Pb) and cadmium (Cd) in clean water. This research is driven by the urgency of water quality monitoring in Indonesia, where heavy metal pollution remains a serious problem requiring inexpensive, portable, and accurate detection tools. The synthesis of modified materials (N-rGO, S-rGO, and N, S-rGO) was successfully carried out through hydrothermal and sonication methods. Fourier Transform Infrared (FTIR) characterization confirmed the successful synthesis by identifying functional groups –SCN, N–H, and C–S that act as active sites for adsorbing heavy metal ions. Based on electrochemical evaluation, the N1S3 composition (1 mmol nitrogen and 100 mmol sulfur) was determined to be the optimal variation with a charge transfer resistance (Rct) of 3904 Ω and a double-layer capacitance (Cdl) of 811.68 μF. Performance testing using the Differential Pulse Voltammetry (DPV) method showed the N1S3 sensor had a Limit of Detection (LOD) of 1,735 mg.L-1 for Pb and 1,152 mg.L-1 for Cd. Dynamic characteristics measured using the Chronoamperometry method showed response times of 5,706 seconds for Pb and 7,21 seconds for Cd. Despite the increased internal surface area, this study noted agglomeration phenomena in the modified material that can inhibit faradaic current, requiring further optimization to improve sensitivity.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Air Bersih, Logam Berat, Nitrogen dan Sulfur, GO, Screen Printed Carbon Electrode, Clean Water, Heavy Metals, Nitrogen and Sulfur, GO, Screen Printed Carbon Electrode. |
| Subjects: | Q Science > QD Chemistry > QD115 Electrochemical analysis Q Science > QD Chemistry > QD75.2 Chemistry, Analytic T Technology > TD Environmental technology. Sanitary engineering > TD259.2 Drinking water. Water quality T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.674 Detectors. Sensors |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | M. Zidane Fatuna Albab |
| Date Deposited: | 04 Feb 2026 01:35 |
| Last Modified: | 04 Feb 2026 01:35 |
| URI: | http://repository.its.ac.id/id/eprint/132096 |
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