Mn掺杂ZnS/ZnS核壳量子点磷光猝灭法测定铜离子
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摘要
通过水热法合成了N-乙酰-L-半胱氨酸为稳定剂的锰掺杂硫化锌/硫化锌核壳量子点(NAC-ZnS/Mn:ZnS QDs),对其结构了进行表征。该核壳量子点的磷光强度随着Cu2+浓度的增加逐渐被猝灭,基于此构建了检测Cu2+的磷光探针。在最佳的实验条件下,Cu2+浓度与核壳量子点的磷光强度呈良好线性关系,检测的线性范围为0～10. 0μmol/L,检出限为8. 97 nmol/L,相对标准偏差是2. 8%。与其它金属离子相比,该种磷光探针对Cu2+具有良好的响应。并对掺杂核壳量子点与Cu2+相互作用可能的猝灭机制进行了探讨。磷光探针可应用于测定环境水样中微量Cu2+,回收率为98. 6%～105. 6%。
An environmental friendly NAC capped Mn dopedcore-shell ZnS/Zn squantum dots( NACZn S/Mn: ZnS QDs) were synthesized by hydrothermal process and characterized. The phosphorescence intensity of NAC-ZnS/Mn: ZnS QDs was gradually quenched with increasing concentration of Cu2 +,and the phosphorescence probe for detection of Cu2 +was proposed based on NAC-ZnS/Mn: ZnSQDs.Under the optimum conditions,the phosphorescence intensity of NAC-ZnS/Mn: Zn S QDs was linearly proportional to the concentrationof Cu2 +in the range from 0 to10. 0 μmol/Lwith the limit of8. 97 nmol/L and relative standard deviation of 2. 8 %. Meanwhile,the effect of foreign ions displayed a low interference response in the detection of Cu2 +ion. Moreover,based on phosphorescence decays of NAC-ZnS/Mn: ZnS QDs,the quenching mechanism between NAC-ZnS/Mn: ZnS QDs and Cu2 +ion was preliminarily discussed. The phosphorescence probe was successfully applied to detect trace Cu2 +in environmental water sample with good recoveries of 98. 60 %-105. 60 %.
An environmental friendly NAC capped Mn dopedcore-shell ZnS/Zn squantum dots( NACZn S/Mn: ZnS QDs) were synthesized by hydrothermal process and characterized. The phosphorescence intensity of NAC-ZnS/Mn: ZnS QDs was gradually quenched with increasing concentration of Cu2 +,and the phosphorescence probe for detection of Cu2 +was proposed based on NAC-ZnS/Mn: ZnSQDs.Under the optimum conditions,the phosphorescence intensity of NAC-ZnS/Mn: Zn S QDs was linearly proportional to the concentrationof Cu2 +in the range from 0 to10. 0 μmol/Lwith the limit of8. 97 nmol/L and relative standard deviation of 2. 8 %. Meanwhile,the effect of foreign ions displayed a low interference response in the detection of Cu2 +ion. Moreover,based on phosphorescence decays of NAC-ZnS/Mn: ZnS QDs,the quenching mechanism between NAC-ZnS/Mn: ZnS QDs and Cu2 +ion was preliminarily discussed. The phosphorescence probe was successfully applied to detect trace Cu2 +in environmental water sample with good recoveries of 98. 60 %-105. 60 %.
引文
[1] Huo J Z,Liu K,Zhao X J,et al. Spectrochim Acta A,2014,117:789
[2] Xu R X,Yu X Y,Gao C,et al. Anal Chim Acta,2013,790:31
[3] Christison T T,Rohrer J S. J Chromatogr A,2007,1155(1):31
[4] LIN G X,JIANG X R. Chin. J. Anal. Lab.,2014,33(11):1335林光西,蒋萧茹,分析试验室,2014,33(11):1335
[5] Tian X,Cao L X,Liu W,et al. Micro&Nano Lett,2012,7(7):604
[6] Jian W P,Zhuang J Q,Zhang D W,et al. Mater Chem Phys,2006,99(2-3):494
[7] Geszke M,Murias M,Balan L,et al. Acta Biomater,2011,7(3):1327
[8] Li D,Wang H F. Anal Chem,2013,85(10):4844
[9] Wang J Z,Zhou X P,Ma H B,et al. Spectrochim Acta A,2011,81(1):178
[10] Li C X,Jiang D Y,Zhang L L,et al. Langmuir,2012,28(25):9729
[11] Park J Y,Lee C G,Seo H W,et al. Appl Surf Sci,2018,429:225
[12] Miao Y M,Yang Q,Lv J Z,et al. New J. Chem,2017,41(24):14882
[13] Zhuang J Q,Zhang X D,Wang G,et al. J Mater Chem,2003,13(7):1853
[14] Zhang G M,Li Y H,Xu J,et al. Sensor. Actuat. B-Chem. 2013(183):583
[15] SHAN Y J,WU G F,LU X Q,et al. Chem Res Appl. 2017,29(6):786单益江,武国凡,卢小泉,等.化学研究与应用,2017,29(6):786
[16] Nurerk P,Kanatharana P,Bunkoed O. Luminescence,2016,31(2):515
[17] Chen X G,Lu Q J,Liu D. et al. Microchim Acta,2018,185:188
[18] Liu Q L,Zhang N,Shi H Y,et al. New J Chem,2018,42(4):3097
[2] Xu R X,Yu X Y,Gao C,et al. Anal Chim Acta,2013,790:31
[3] Christison T T,Rohrer J S. J Chromatogr A,2007,1155(1):31
[4] LIN G X,JIANG X R. Chin. J. Anal. Lab.,2014,33(11):1335林光西,蒋萧茹,分析试验室,2014,33(11):1335
[5] Tian X,Cao L X,Liu W,et al. Micro&Nano Lett,2012,7(7):604
[6] Jian W P,Zhuang J Q,Zhang D W,et al. Mater Chem Phys,2006,99(2-3):494
[7] Geszke M,Murias M,Balan L,et al. Acta Biomater,2011,7(3):1327
[8] Li D,Wang H F. Anal Chem,2013,85(10):4844
[9] Wang J Z,Zhou X P,Ma H B,et al. Spectrochim Acta A,2011,81(1):178
[10] Li C X,Jiang D Y,Zhang L L,et al. Langmuir,2012,28(25):9729
[11] Park J Y,Lee C G,Seo H W,et al. Appl Surf Sci,2018,429:225
[12] Miao Y M,Yang Q,Lv J Z,et al. New J. Chem,2017,41(24):14882
[13] Zhuang J Q,Zhang X D,Wang G,et al. J Mater Chem,2003,13(7):1853
[14] Zhang G M,Li Y H,Xu J,et al. Sensor. Actuat. B-Chem. 2013(183):583
[15] SHAN Y J,WU G F,LU X Q,et al. Chem Res Appl. 2017,29(6):786单益江,武国凡,卢小泉,等.化学研究与应用,2017,29(6):786
[16] Nurerk P,Kanatharana P,Bunkoed O. Luminescence,2016,31(2):515
[17] Chen X G,Lu Q J,Liu D. et al. Microchim Acta,2018,185:188
[18] Liu Q L,Zhang N,Shi H Y,et al. New J Chem,2018,42(4):3097