Sintesis Karbon Dot Berbahan Dasar Limbah Organik sebagai Sensor Pendeteksi Ion Logam Berat

Nurfathiya, Nadhira (2018) Sintesis Karbon Dot Berbahan Dasar Limbah Organik sebagai Sensor Pendeteksi Ion Logam Berat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Telah dilakukan penelitian mengenai karbon dot berbahan dasar limbah organik untuk diaplikasikan sebagai sensor pendeteksi ion logam berat. Karbon dot berbahan dasar limbah organik basah diektraksi kulit buah semangka, sedangkan karbon dot berbahan dasar limbah organik kering diektraksi dari kulit kacang. Metode sintesis yang digunakan adalah metode bottom-up dengan dua variasi teknik, yaitu teknik hidrotermal dan iradiasi gelombang mikro. Dilakukan tiga variasi waktu pada tiap teknik sintesis. Produk karbon dot kemudian dipelajari dengan beberapa teknik karakterisasi yaitu karakterisasi absorbansi, fotoluminesens, TRPL, dan FTIR. Berdasarkan karakterisasi yang telah dilakukan, absorbansi, fotoluminesens, dan TRPL dari produk karbon dot berada antara 300 nm, 500 nm, dan 2,54 ns hingga 4,14 ns. Dari seluruh variasi karbon dot, dipilih dua jenis karbon dot yang memiliki karakteristik yang hampir sama untuk dibandingkan sebagai pendeteksi ion logam berat. Kedua karbon dot dibandingkan berdasarkan performansi sebagai sensor ion logam Fe3+ dan Pb2+ dengan variasi konsentrasi mulai dari 1 nM hingga 10-9 M dengan interval sebesar 10-1 kali. Karakteristik terbaik didapat oleh karbon dot kulit kacang dalam mendeteksi ion logam berat besi dengan nilai regresi sebesar 0,6542 (absorbansi); 0,6567 (PL); dan 0,6168 (TRPL). ================ A study of dry and wet organic waste-based carbon dots for heavy metal ion detection sensor in aqueous medium had been prepared. Wet organic wastes were extracted from watermelon rind, while dry organic wastes were extracted from peanut shells. The synthesis method used was bottom-up with hydrothermal and microwave irradiation techniques. Three time variations were performed on each synthesis technique. The characterizations were investigated on carbon dots absorbance, photoluminescence, TRPL, and functional groups using FTIR spectroscopy. Based on those characterizations, the absorbance, photoluminescence, and TRPL of watermelon rind and peanut shells carbon dots are around 300 nm, 500 nm, and 2.54 ns to 4.14 ns. Of the four types, two products with similar characteristics were selected for further investigation. Both products were compared based on their performance as Fe3+ and Pb2+ sensors which are varied from 1 nM to 10-1 M with 10-1 interval. The best performance was achieved by peanut shells carbon dots in Fe3+ detection, due to its consistency in optical characteristics degradations with regression value of 0.6542 (absorbance); 0.6567 (PL); and 0.6168 (TRPL).

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Carbon Dots, Limbah Organik, Deteksi Logam Berat, Carbon Dots, Organic Waste, Heavy Metal Detection
Subjects: Q Science > QC Physics > QC475 Photoluminescence
Q Science > QD Chemistry > QD251.2 Chemistry, Organic. Biochemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.674 Detectors. Sensors
T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions: Faculty of Industrial Technology > Physics Engineering > (S1) Undergraduate Theses
Depositing User: Nurfathiya Nadhira
Date Deposited: 18 Jan 2019 07:23
Last Modified: 18 Jan 2019 07:23
URI: http://repository.its.ac.id/id/eprint/58504

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