Green Emission Carbon Quantum Dots from Lemon Juice for Selective Detection of Fe 3+ Ions

• Main Authors: Bui, Thi Hoan, Phuong, Dinh Tam, Pham, Vuong-Hung
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2019
• Subjects: Carbon quantum dots; Lemon juice; Sensing Fe3+
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/64485; https//doi.org/ 10.25073/2588-1124/vnumap.4317
• Institution: Vietnam National University, Hanoi

In this article carbon quantum dots (Cdots) were prepared by a facile, green, economical hydrothermal method of the mixed deionized water and lemon juice. Optical and structural properties of the Cdots have been extensively studied by UV–visible and fluorescence spectroscopy, x-ray diffraction (XRD) techniques, and high-resolution TEM (HR-TEM). Surface functionality of Cdots has been illustrated by Fourier transform infrared spectroscopy (FTIR). The fabricated Cdots emit bright green light with a broad spectrum. The Cdots exhibit captivating sensitivity and selectivity toward Fe 3+ with a linear range from 0 to 80 ppm and a detection limit of 38.08 ppm.