...
首页> 外文期刊>Canadian Journal of Chemistry >UV-emitting polyelectrolyte-modified MoS2 quantum dots for selective determination of nitrophenol in water samples based on inner filter effect
【24h】

UV-emitting polyelectrolyte-modified MoS2 quantum dots for selective determination of nitrophenol in water samples based on inner filter effect

机译:紫外线发射聚电解质改性MOS2量子点,用于基于内部滤波器效应选择性测定水样中的硝基苯酚

获取原文
获取原文并翻译 | 示例
           

摘要

In this work, poly(sodium 4-styrenesulfonate) (PSS) modified molybdenum disulfide quantum dots (MoS2-PSS QDs) were synthesized via a simple hydrothermal method using L-cysteine and anhydrous sodium molybdate as precursors and PSS as a modification reagent, and a selective and sensitive fluorescent sensing method for the determination of p-nitrophenol (p-NP) based on their UV emission was developed. The obtained MoS2-PSS QDs have an obvious UV emission peak (390 nm) with quantum yield of 5.13%. The strong absorption peak of p-NP at 400 nm has large spectral overlap with the UV emission peak (390 nm) of MoS2-PSS QDs. Because of this p-NP absorption, the fluorescence of MoS2-PSS QDs at 390 nm is quenched with the introduction of p-NP via the inner filter effect (IFE) and the decreased fluorescence intensity was linearly proportional to the p-NP concentration in the range of 1-20 mu mol/L, leading to a detection limit of 0.13 mu mol/L for p-NP. The MoS2 QDs-based fluorescent probe for p-NP is sensitive and selective and was successfully applied in the determination of p-NP in the pond water samples with satisfactory results.
机译:在这项工作中,通过使用L-半胱氨酸和无水钼酸钠作为前体和PSS作为改性试剂,通过简单的水热法合成聚(4-苯乙烯磺酸盐)(PSS)改性钼二硫化钼量子点(MOS2-PSS QDS),作为前体和PSS作为改性试剂,基于其UV排放,开发了一种用于测定p-硝基苯酚(P-NP)的选择性和敏感的荧光传感方法。所得MOS2-PSS QD具有明显的UV发射峰(390nm),量子产率为5.13%。在400nm处的P-NP的强吸收峰具有大的光谱重叠与MOS2-PSS QD的UV发射峰值(390nm)具有大的光谱重叠。由于该P-NP吸收,通过内部滤波器效应(IFE)引入P-NP,淬灭MOS2-PSS QDS的荧光,并且通过内部过滤器效应(IFE),荧光强度降低与P-NP浓度线性成比例1-20μmmol/ l的范围,导致p-np的0.13μmol/ l的检出限。用于P-NP的MOS2基础QDS的荧光探针是敏感和选择性的,并成功地应用于具有令人满意的结果的池塘水样中的P-NP。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号