• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Highly photoluminescent pH-independent nitrogen-doped carbon dots for sensitive and selective sensing of p-nitrophenol
【24h】

Highly photoluminescent pH-independent nitrogen-doped carbon dots for sensitive and selective sensing of p-nitrophenol

机译：高度光致发光的pH-无关的氮气掺杂碳点，用于对硝基苯酚的敏感和选择性感测

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nitrogen-doped carbon quantum dots (N-CDs) have become a current focus of chemical research due to their superior photoluminescence (PL) properties and high fluorescence quantum yield (QY). In this paper, we reported a facile, simple and low-cost approach for the synthesis of highly fluorescent and stable N-CDs by hydrothermal treatment of maleic acid and ethylenediamine. The as-prepared N-CDs emitted strong blue fluorescence with an absolute QY of up to 45%, and exhibited pH-independent behavior in a wide pH range from 1 to 13 and good water solubility. In addition, the fluorescence of the N-CDs can be significantly quenched by p -nitrophenol (4-NP) through an electron-transfer-induced dynamic quenching mechanism, leading to 4-NP being sensed optically. The sensor presented a good linearity with 4-NP concentration in the range of 0.10–11 μg mL ~(?1) . The detection limit of 22 ng mL ~(?1) 4-NP could be obtained, which is lower than the 60 ng mL ~(?1) limit allowed in drinking water by the U. S. Environmental Protection Agency. The sensor exhibited rapid recognition and distinguished selectivity to 4-NP over other structural analogues of phenols. Moreover, the sensing system was successfully applied for the determination of 4-NP in environmental water samples.
机译：由于其优异的光致发光（PL）性能和高荧光量子产率（QY），氮掺杂碳量子点（N-CDS）已成为化学研究的目前焦点。在本文中，我们报告了通过对马来酸和乙二胺的水热处理合成高荧光和稳定的N-Cds的容易，简单，低成本的方法。由制备的N-CD发出强大的蓝色荧光，绝对QY高达45％，并在宽的pH范围内显示pH无关的行为，且良好的水溶性。另外，通过电子转移诱导的动态猝灭机构，可以通过对硝基苯酚（4-NP）显着淬灭N-CD的荧光，从而光学感测到4-NP。传感器呈现出良好的线性度，其具有4-NP浓度在0.10-11μgml〜（α1）的范围内。可以获得22ng ml〜（α1）4-np的检出限，该4-np低于美国环境保护局饮用水中允许的60ng ml〜（α1）限制。该传感器在其他结构类似物的其他结构类似物上表现出快速识别和可参与4-NP的选择性。此外，传感系统成功地应用于环境水样中4-NP的测定。

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