氧化锡量子点的合成及对抗坏血酸的灵敏传感研究  

Synthesis of Tin Oxide Quantum Dots-based Fluorescence Probe for AA Sensitive Detection

作　　者：曾慧慧[1,2] 肖梅珍 晏根平 刘芳[1,2] 黄检 陈林[1,2] 施卫国 ZENG Hui-hui;XIAO Mei-zhen;YAN Gen-ping;LIU Fang;HUANG Jian;CHEN Lin;SHI Wei-guo(Jiangxi Key Laboratory of Industrial Ceramics,Pingxiang University,Pingxiang 337055,China;College of Materials and Chemical Engineering,Pingxiang University,Pingxiang 337055,China)

机构地区：[1]萍乡学院江西省工业陶瓷重点实验室,江西萍乡337055 [2]萍乡学院材料与化学工程学院,江西萍乡337055

出　　处：《发光学报》2019年第12期1554-1562,共9页Chinese Journal of Luminescence

基　　金：江西省教育厅科学技术研究项目(GJJ17132);国家自然科学基金(21565019,21705083)资助项目~~

摘　　要：采用水热法合成了一种SnO 2量子点,对其合成条件(如pH、温度、时间等)进行了优化,并使用红外光谱、X粉末衍射、粒度分析仪、荧光光谱仪等手段对量子点的物化和光学性能进行了表征。实验结果显示,合成的SnO 2量子点分散均匀、粒径为5 nm左右;在310 nm波长光激发下,其最强发射峰位于415 nm,且表现出良好的光学稳定性。在Fe 3+存在时,SnO 2量子点的荧光被猝灭,而Fe 2+对SnO 2量子点的荧光没有影响,利用抗坏血酸(AA)的还原性,将Fe 3+还原成Fe 2+,猝灭的SnO 2量子点荧光恢复,当AA浓度为500μmol·L-1时,SnO 2荧光恢复率达到95.88%,其他氨基酸基本没有响应。基于此,构建了一种“off-on”荧光探针用于抗坏血酸灵敏检测。Using the stannous chloride as raw materials,we synthesized a SnO 2 quantum dots by the means of hydrothermal method in this paper.The synthesis conditions such as pH,temperature,as well as time were optimized,and the FT-IR,XRD,Malvern Zetasizer Nano ZS90,FL-4600 fluorescence spectrophotometer etc.were utilized for the physicochemical and optical properties characterization of SnO 2 quantum dots.The experimental result shows that the size of SnO 2 quantum dots is about 5 nm,when excited with 310 nm light,the maximum emission peak of SnO 2 quantum dots locats at 415 nm.In the presence of Fe 3+,the fluorescence of SnO 2 quantum dots is quenched,while the Fe 2+has no affection on the fluorescence of SnO 2.Utilizing the reduction of ascorbic acid(AA),the Fe 3+ions can be reduced to Fe 2+,resulting in the fluorescence restore efficiently.When the concentration of AA is 500μmol·L-1,the fluorescence recovery can reach to 95.88%.Based on this,we constructed a novel off-on fluorescence probe based on SnO 2 quantum dots for the sensitive detection of AA.

关 键 词：SNO 2量子点 荧光探针 AA检测 

分 类 号：O657.39[理学—分析化学]