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All Journal MPI (Media Pharmaceutica Indonesiana) Indonesian Journal of Chemistry Indonesian Journal of Chemical Analysis (IJCA) Stannum : Jurnal Sains dan Terapan Kimia Jurnal Pengabdian Masyarakat Bangsa
Aji, Abdul
Department Of Chemistry, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Jati Agung, Lampung 35365, Indonesia
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Preliminary Study on Fe(III) Detection Using Nitrogen-Doped Carbon Quantum Dots via HSV-Based Smartphone Fluorescence Analysis Agustina, Erika; Damayanti, Wulan Amalia Mustika; Aji, Abdul; Ghifari, M Alvien
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 2 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss2.art3

Abstract

This study successfully synthesized nitrogen-doped carbon quantum dots (N-CQDs) from banana peel waste via a hydrothermal method using urea as the nitrogen source. FTIR and optical characterization confirmed the presence of hydroxyl, carbonyl, and amine functional groups, along with distinct photophysical features, including an absorption peak at 304 nm, excitation at 392 nm, and blue fluorescence emission at 465 nm. Upon Fe(III) exposure, the N-CQDs exhibited selective fluorescence quenching and a measurable hue (H) value shift. A linear relationship was observed between hue and Fe(III) concentration in the 1-5 mM range (R2 = 0.9822). The limit of detection (LOD) and limit of quantification (LOQ) were estimated at 0.948 mM and 2.875 mM, respectively. These findings demonstrate the potential of banana peel-derived N-CQDs as a low-cost, environmentally friendly, and smartphone-compatible fluorescence probe for Fe(III) detection in aqueous environments
Co-Authors Agung, Ahmad Anggraria Agustina Sus Andreani Agustina, Erika Ahmad Ahmad Ahmad Fathoni Ahmad, Rizal Al Akbar, Fadhlur Rohman arif ashari Ayuwulanda, Aditya Clara L.A, Cindy Moyna Damayanti, Wulan Amalia Mustika Darmanto Darmanto Demi Dama Yanti Deni, Jose Fikrian Eko Sri Kunarti Farrah Nurkhaliza Ghifari, M Alvien Ghifari, M. Alvien Gina Yuliana, Gina Hawa Purnama Celala Ary Cane Herlina, Idra I Putu Mahendra Indarto Indarto Kusuma, M. Rizky Jaya Mariyam Mariyam Muhammad Eka Prastya Muhammad Yogi Saputra Nugraha, Septa Putri PERMATASARI, Galuh Wening Putranto, Reyhan Puji Qodri, M. Faisal Rahmat Kurniawan Ramadhani, Anggia Noor Rodiyah - Rofifah, Nabila Rohadi, Rahmat Saputra, M. Yogi Saputra, Odi Simanjuntak, Regita Siregar, Nonny Cristine Sri Juari Santosa Sudarmanto, Irwan Tuta, Gabriell Vanes Sabat Wuryo, Abid Dhecaesaro Yoga Anjas Pratama Yuniarto, Ari Zetryana Puteri Tachrim