Author(s): Wang, ZH (Wang, Zihao); Chen, D (Chen, Da); Gu, BL (Gu, Bingli); Gao, B (Gao, Bo); Liu, ZD (Liu, Zhiduo); Yang, YS (Yang, Yongsheng); Guo, QL (Guo, Qinglei); Zheng, XH (Zheng, Xiaohu); Wang, G (Wang, Gang)
Source: DIAMOND AND RELATED MATERIALS Volume: 104 Article Number: 107749 DOI: 10.1016/j.diamond.2020.107749 Published: APR 2020
Abstract: Rapid and sensitive fluorescence nanomaterials sensor with satisfactory selectivity has gained numerous importance for detecting multiple metal ions. Graphene quantum dot (GQD) has attracted a great deal of attentions. Herein, yellow emissive GQDs with a high quantum yield of 0.34 were achieved by nitrogen-doping. The asprepared N-GQDs exhibited excitation-independent behavior and high optical stability. Furthermore, based on the complexation between Fe3+ and N-GQDs, the fluorescence intensity of the N-GQDs could be greatly quenched by the addition of a small amount of Fe3+ ions. The linearity range is 0-80 mu M with a detection limit of 63 nM. For this reason, the proposed method was demonstrated to be selective and suitable for Fe3+ analysis in natural water samples. And, N-GQDs with the biosafety have the potentials for intracellular Fe3+ detection.
Accession Number: WOS:000526718300021
ISSN: 0925-9635
eISSN: 1879-0062
Full Text: https://www.sciencedirect.com/science/article/pii/S0925963519308507?via%3Dihub