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  

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

作　　者：邓学祖 王方明[1] 王彩荷 秦冬冬[1] 李毅然[1] 陕多亮[1] 卢小泉[1] DENG Xue-Zu WANG Fang-Ming WANG Cai-He QIN Dong-Dong LI Yi-Ran SHAN Duo-Liang LU Xiao-Quan(Key Laboratory of Bioelectrochemistry ＆ Environmental Analysis of Gansu Province, College of Chemistry ＆ Chemical Engineering, Northwest Normal University, Lanzhou730070, Chin)

机构地区：[1]甘肃省生物电化学与环境分析重点实验室,西北师范大学化学化工学院,兰州730070

出　　处：《分析化学》2016年第12期1852-1858,共7页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(Nos.21575115,21327005,21175108)~~

摘　　要：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π-π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。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.

关 键 词：氮化碳量子点 荧光传感器 三硝基苯酚 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学]