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首页> 外文期刊>RSC Advances >Sulfur-doped graphene quantum dot-based paper sensor for highly sensitive and selective detection of 4-nitrophenol in contaminated water and wastewater
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Sulfur-doped graphene quantum dot-based paper sensor for highly sensitive and selective detection of 4-nitrophenol in contaminated water and wastewater

机译：硫掺杂石墨烯量子点纸传感器，用于污染水和废水中4-硝基苯酚的高敏感和选择性检测

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4-Nitrophenol (4-NP) is a promulgated priority pollutant, which can cause a negative impact on human health. The development of a direct and effective technique for the rapid detection and screening of 4-NP is, therefore, of urgent need. In this study, the blue luminescent sulfur-doped graphene quantum dots (S-GQDs) with a size of 1-5 nm are fabricated using a one-step pyrolysis procedure in the presence of citric acid and 3-mercaptosuccinic acid. The S-GQDs exhibit a strong emission band at 450 nm under the excitation of 330 nm UV light. 4-NP can serve as the fluorescence quencher by the pi-pi interaction with S-GQD, resulting in the linear decrease in fluorescence intensity after the addition of various 4-NP concentrations ranging from 10 nM to 200 mu M. The S-GQDs serve as the sensing probe to enhance the analytical performance on 4-NP detection with the limit of detection values of 0.7 and 3.5 nM in deionized water and wastewater, respectively. The S-GQD based sensing platform can be used to detect 4-NP in different matrices of water and wastewater. In addition, the detected percentages of spiked 4-NP concentrations in the presence of different matrices and interferences are in the range of (98 +/- 5)-(108 +/- 2)%. Moreover, the S-GQD based paper sensor can rapidly screen 4-NP in wastewater within 1 min. Results obtained in this study clearly demonstrate the superiority of S-GQDs as a promising fluorescence probe for highly sensitive and selective detection of a wide concentration range of 4-NP in deionized water and wastewater.
机译：4-硝基苯酚（4-NP）是颁布的优先级污染物，这可能对人类健康产生负面影响。因此，为4-NP的快速检测和筛选的直接和有效技术的开发是迫切需要的。在该研究中，在柠檬酸和3-巯基琥珀酸存在下，使用一步热解法制造尺寸为1-5nm的蓝色发光硫掺杂石墨烯量子点（S-GQD）。 S-GQD在450nm下在330nm紫外线光的激发下表现出强发射带。 4-NP可以通过与S-GQD的PI-PI相互作用用作荧光猝灭剂，在添加10nm至200μmM的各种4np浓度范围内，导致荧光强度的线性降低。S-GQDS用作感测探针，以增强4-NP检测的分析性能，分别具有0.7和3.5nm的检测值的极限分别在去离子水和废水中。基于S-GQD的传感平台可用于检测水和废水的不同矩阵中的4-NP。此外，在不同基质和干扰存在下检测到的掺入的4-NP浓度百分比在（98 +/- 5） - （108 +/- 2）％的范围内。此外，S-GQD基纸传感器可以在1分钟内快速筛选废水中的4-NP。本研究中获得的结果清楚地证明了S-GQDS的优越性作为具有高度敏感和选择性检测的去离子水和废水中4-NP的高敏感和选择性检测的有希望的荧光探针。

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    《RSC Advances》 |2019年第46期|共10页
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  • 正文语种 eng
  • 中图分类 化学;
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