Synthesis of durian shell-based carbon dots and its application in the detection of $${\text{MnO}}_{4}^{ - }$$and $${\text{Cr}}_{{2}} {\text{O}}_{7}^{2 - }

• Published in: Carbon Letters Vol. 35; no. 3; pp. 1153 - 1165
• Main Authors: Hu, Chaoshuai, Liu, Yuanxin, Zhang, Jian, Zhu, Yaming, Yin, Xitao, Zhao, Xuefei
• Format: Journal Article
• Language: English
• Published: 한국탄소학회 01.06.2025
• Subjects: 자연과학일반
• ISSN: 1976-4251; 2233-4998
• DOI: 10.1007/s42823-024-00848-5

Using durian shell as a carbon source and triethanolamine as a nitrogen dopant, nitrogen-doped carbon dots (N-CDs) were prepared via the hydrothermal method. First, by exploring different reaction times, reaction temperatures, and carbon source/dopant ratios to synthesize nitrogen-doped carbon dots, it is concluded that the best process conditions are 200 ℃, reaction time being 15h, and the dopant addition amount being 2mL. Structure and characteristics of the synthesized CDs were analyzed using X-ray photoelectron spectroscopy, Fourier-transform infrared, fluorescence (FL), ultraviolet–visible absorption, and Raman spectra. The N-CDs showed blue FL with a quantum efficiency of 4.28%. The FL characteristics of the N-CDs were utilized for ion detection, which demonstrated that and ions caused distinct FL quenching through static quenching, while other ions had no significant quenching effect. The detection limits for and were 37.5 and 46.2 nM, respectively. The N-CDs were subsequently employed to detect these ions in actual water samples, producing satisfactory results. Therefore, the preparation of N-CDs using durian shell as raw material and its application in practical detection work have good application feedback, which not only provides a new way for the reuse of fruit and vegetable wastes but also provides a new detection means for environmental monitoring pollutants. KCI Citation Count: 0