石墨相氮化碳聚合物纳米点作为检测Fe³⁺和Cu²⁺离子的有效荧光探针。
Polymer nanodots of graphitic carbon nitride as effective fluorescent probes for the detection of Fe³⁺ and Cu²⁺ ions.
作者信息
Zhang Shouwei, Li Jiaxing, Zeng Meiyi, Xu Jinzhang, Wang Xiangke, Hu Wenping
机构信息
School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, PR China.
出版信息
Nanoscale. 2014 Apr 21;6(8):4157-62. doi: 10.1039/c3nr06744k.
A simple and green route was developed for the first time to produce fluorescent graphitic carbon nitride (F-g-C₃N₄) by hydrothermal treatment of bulk g-C₃N₄. The produced F-g-C₃N₄ dots have blue emission and a high quantum yield, and were applied as a very effective fluorescent probe for label-free selective and sensitive detection of Cu(2+) and Fe(3+) ions; the limits of detection were as low as 0.5 nM and 1.0 nM, respectively. By using sodium hexametaphosphate (SHPP) as a masking agent of Fe(3+), Cu(2+) was exclusively detected in the presence of Fe(3+) ions. Cu(2+) and Fe(3+) ions in real water samples were also detected successfully. This exceptional fluorescent performance makes the probes based on F-g-C₃N₄ dots attractive for highly sensitive detection of Cu(2+) and Fe(3+) ions in real water.
首次开发了一种简单且绿色的路线，通过对块状g-C₃N₄进行水热处理来制备荧光石墨相氮化碳（F-g-C₃N₄）。所制备的F-g-C₃N₄量子点具有蓝色发射和高量子产率，并被用作一种非常有效的荧光探针，用于对Cu(2+)和Fe(3+)离子进行无标记的选择性和灵敏检测；检测限分别低至0.5 nM和1.0 nM。通过使用六偏磷酸钠（SHPP）作为Fe(3+)的掩蔽剂，在存在Fe(3+)离子的情况下能够专门检测出Cu(2+)。实际水样中的Cu(2+)和Fe(3+)离子也被成功检测。这种出色的荧光性能使得基于F-g-C₃N₄量子点的探针对于实际水样中Cu(2+)和Fe(3+)离子的高灵敏检测具有吸引力。
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