Zhang Shouwei, Li Jiaxing, Zeng Meiyi, Xu Jinzhang, Wang Xiangke, Hu Wenping
School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, PR China.
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。
