KURNIA, SELVI (2025) DETEKTOR ION LOGAM Fe3+ DARI CARBON DOTS LIMBAH KULIT KENTANG MENGGUNAKAN TEKNIK IRADIASI GELOMBANG MIKRO. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
This study aims to develop a Fe³⁺ ion detector based on carbon dots (C-Dots) synthesized from potato peel waste using a microwave heating method. This method was chosen because the process is fast, efficient, and environmentally friendly. C-Dots characterization was carried out using a UV-Vis Spectrophotometer and Photoluminescence (PL) to analyze its optical properties and interactions with Fe³⁺ ions. The UV-Vis Spectrophotometer test was carried out in the wavelength range of 245-800 nm. The results showed that C-Dots had an absorbance peak of 4,379 at a wavelength of 251 nm. After the addition of Fe³⁺ ions, the absorbance peak shifted to 4,120 at a wavelength of 245, indicating an interaction between C-Dots and Fe³⁺ ions. In addition, the PL test results showed an increase in emission intensity after the addition of Fe³⁺ ions, indicating that C-Dots can be used as a fluorescent sensor to detect the presence of Fe³⁺ ions.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Penelitian ini bertujuan untuk mengembangkan detektor ion Fe³⁺ berbasis carbon dots (C-Dots) yang disintesis dari limbah kulit kentang menggunakan metode pemanasan gelombang mikro (microwave). Metode ini dipilih karena prosesnya yang cepat, efisien, dan ramah lingkungan. Karakterisasi C-Dots dilakukan menggunakan Spektrofotometer UV-Vis dan Photoluminescence (PL) untuk menganalisis sifat optiknya serta interaksi dengan ion Fe³⁺. Uji Spektrofotometer UV-Vis dilakukan pada rentang panjang gelombang 245-800 nm. Hasilnya menunjukkan bahwa C-Dots memiliki puncak absorbansi sebesar 4.379 pada panjang gelombang 251 nm. Setelah penambahan ion Fe³⁺, puncak absorbansi bergeser ke 4.120 pada panjang gelombang 245, menunjukkan adanya interaksi antara C-Dots dan ion Fe³⁺. Selain itu, hasil uji PL menunjukkan peningkatan intensitas emisi setelah penambahan ion Fe³⁺, mengindikasikan bahwa C-Dots dapat digunakan sebagai sensor fluoresen untuk mendeteksi keberadaan ion Fe³⁺. | |||||||||
| Uncontrolled Keywords: | Carbon dots, Fe³⁺, potato peel waste, UV-Vis, photoluminescence, microwaves. Carbon dots, Fe³⁺, limbah kulit kentang, UV-Vis, photoluminescence, gelombang mikro. | |||||||||
| Subjects: | L Education > L Education (General) Q Science > Q Science (General) Q Science > QC Physics |
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| Divisions: | 02-Fakultas Keguruan dan Ilmu Pendidikan 02-Fakultas Keguruan dan Ilmu Pendidikan > 84203-Jurusan Pendidikan Fisika |
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| Depositing User: | Selvi Kurnia Kurnia | |||||||||
| Date Deposited: | 21 Jul 2025 07:33 | |||||||||
| Last Modified: | 21 Jul 2025 07:33 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/51125 |
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