类石墨相氮化碳量子点（g-CNQDs）用于水质中三硝基苯酚的检测

基于类石墨相氮化碳量子点( g-CNQDs)建立了一种高效、灵敏、简单的荧光化学传感器用于检测水相中的三硝基苯酚( TNP)。 g-CNQDs是一种新型纳米半导体材料，具有很好的水溶性、生物相容性、环境友好、良好荧光特性，无毒性，通过简单的固相反应法，制备了g-CNQDs材料，探讨了g-CNQDs与TNP之间的相互作用(如仔-仔共轭作用、氢键相互作用和静电作用)引起的g-CNQDs荧光猝灭过程。此荧光传感器响应速度快，对TNP具有良好的选择性。实验结果表明，本方法在0.1~100 nmol/L和0.1~100μmol/L的浓度范围内呈现良好的线性关系，检出限为0.05 nmol/L ( S/N=3)。 g-CNQDs材料在化学传感器方面有很好的应用前景，利用此荧光传感器对实际水样中的TNP进行了检测，为监测水环境中TNP提供了新方法。

Fluorescent Sensor Based on Graphite Carbon Nitride Quantum Dots for Detection of 2,4,6-Trinitrophenol in Water Environment

An extremely efficient, sensitive and facile fluorescent sensing approach for detection of 2,4,6-trinitrophenol ( TNP ) based on the graphite carbon nitride quantum dots ( g-CNQDs ) was reported. The g-CNQDs material, a novel nanometer sized semiconductor with distinct characteristics of good water-solubility, biocompatibility, environmental-friendly nontoxicity property, was successfully prepared by solid-state reaction strategy at an extremely low temperature, and we revealed that the fluorescence quenching of g-CNQDs ascribe to the molecular interactions ( such as electrostatic,仔-仔, and hydrogen bonding interactions) between TNP and g-CNQDs. This fluorescence sensor presented high selectivity toward TNP with quick response. In the experiment, we found that g-CNQDs exhibited fine linear relationship in the concentration of 0. 1 -100 μmol/L and 0. 1-100 μmol/L of TNP with a low detection limit (0. 05 nmol/L, S/N=3). The proposed approach has a perfectly potential application prospect in fluorescence sensing field, and can be employed for determination of TNP in natural water samples and supervision of TNP in the natural water environment.