Multipurpose sensing applications of biocompatible radish-derived carbon dots as Cu2+ and acetic acid vapor sensors
Multipurpose sensing applications of biocompatible radish-derived carbon dots as Cu2+ and acetic acid vapor sensors
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DOI：
10.1016/j.saa.2018.11.049
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发表时间：
2019-03-15
影响因子：
4.4
通讯作者：
Paoprasert, Peerasak
中科院分区：
文献类型：
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作者：
Praneerad, Janjira;Thongsai, Nichaphat;Paoprasert, Peerasak
碳点（光学独特的纳米材料）制备的最新趋势围绕使用易于获得的低成本自然资源作为前体及其多用途应用。在这项工作中，开发了一种从萝卜中制备生物相容性碳点的水热方法。然后测试碳点对 Cu2+ 和乙酸蒸气的感应。碳点在紫外光照射下呈现蓝色发射，量子产率为15%。当添加 Cu2+ 离子时，荧光发射被选择性猝灭，检测限为 0.16 μM。制备了纸基荧光传感器，并显示其检测 Cu2+ 的检测限为 6.8 μM。碳点能够测定实际水样中的 Cu2+ 浓度，具有良好的回收率和可靠性。碳点还被用作光学电子鼻中的传感材料，并进行了乙酸蒸气的实时检测测试。通过主成分分析，成功鉴定了溶液中不同比例的乙酸与甲醇，检测限为 15.5%。还准确测定了真实醋样品中的乙酸浓度。我们的结果表明，从现成的萝卜中提取的无标记碳点可以简单地用作多功能探针，使其在多用途传感应用中具有潜在用途。 (C) 2018 Elsevier B.V. 保留所有权利。
A recent trend in the preparation of carbon dots, optically unique nanomaterials, revolves around the use of readily-available, low-cost natural resources as precursors and their multipurpose applications. In this work, a hydrothermal method for preparing biocompatible carbon dots from radish was developed. The carbon dots were then tested for sensing of Cu2+ and acetic acid vapor. The carbon dots exhibited blue emission under UV illumination with, a quantum yield of 15%. The fluorescence emission was selectively quenched when Cu2+ ions were added, giving a detection limit of 0.16 mu M. A paper-based fluorescent sensor was fabricated and shown to sense Cu2+ with a limit of detection of 6.8 mu M. The carbon dots were able to determine the Cu2+ concentration in real water samples, with excellent recovery and reliability. The carbon dots were also used as the sensing material in an optical electronic nose, and tested for real-time detection of acetic acid vapor. Using principal component analysis, different ratios of acetic acid to methanol in solution were successfully identified with a detection limit of 15.5%. The acetic acid concentration in a real vinegar sample was also accurately determined. Our results demonstrated that label-free carbon dots derived from readily available radish can be simply used as versatile probes, giving them potential uses in multipurpose sensing applications. (C) 2018 Elsevier B.V. All rights reserved.