摘要
采用一步水热法制备了一种水溶性的、具有良好荧光性能的掺氮碳量子点(N-碳点),其尺寸大小均匀,约为7 nm。N-碳点的荧光强度随N的掺杂量、水热反应温度、溶液的p H值而改变。在最佳反应条件下所制备的N-碳点的荧光量子产率高达24.4%。该N-碳点作为一种简单、低成本的荧光探针用于检测痕量Hg2+,具有高选择性和高灵敏度的特点,其最低检测极限可达到0.02μmol·L-1(4.012 ng)。
The water soluble and nitrogen doped carbon quantum dots（N-CDs） with excellent fluorescence performance were fabricated by one step hydrothermal method.The size of N-CDs is homogeneous and about 7nm.The fluorescent intensity of N-CDs changed with the content of N,reaction temperature and p H value.In the optimal condition,the fluorescence quantum yield of N-CDs reached 24.4%.The N-CDs was found to be a simple,lowcost,high selective and sensitive fluorescent probe for the detection of Hg^2＋ions with a detection limit as low as 0.02 μmol·L^-1（4.012 ng）.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2015年第1期1-6,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21173001,21371003)
关键词
N-碳点
荧光性能
荧光探针
检测
汞离子
N-doped carbon quantum dot
fluorescence performance
fluorescent probe
detection
mercury ion
