Thulasi Sekar, Kathiravan Arunkumar, Asha Jhonsi Mariadoss
Department of Chemistry, B. S. Abdur Rahman Crescent Institute of Science and Technology, Vandalur, Chennai 600048, Tamil Nadu, India.
Vel Tech Research Park, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Avadi, Chennai 600062, Tamil Nadu, India.
ACS Omega. 2020 Mar 18;5(12):7025-7031. doi: 10.1021/acsomega.0c00707. eCollection 2020 Mar 31.
Recycling of waste into valuable products plays a significant role in sustainable development. Herein, we report the conversion of vehicle exhaust waste soot into water-soluble fluorescent carbon dots via a simple acid refluxion method. The obtained carbon dots were characterized using microscopic and spectroscopic techniques. Microscopic techniques reveal that the prepared carbon material is spherical in shape with an average particle size of ∼4 nm. Spectroscopic studies exhibited that the carbon dots are emissive in nature, and the emission is excitation-dependent. Further, the prepared carbon dots were successfully utilized as a fluorescent probe for the detection of tartrazine with a limit of detection of 26 nM. The sensitivity of carbon dots has also been realized by the detection of trace amounts of tartrazine in commercial soft drinks. Overall, this work demonstrates the conversion air pollutant soot into value-added fluorescent nanomaterials toward sensing applications.
将废物回收转化为有价值的产品在可持续发展中发挥着重要作用。在此，我们报告了通过一种简单的酸回流法将汽车尾气废烟灰转化为水溶性荧光碳点。使用显微镜和光谱技术对所得碳点进行了表征。显微镜技术表明，制备的碳材料呈球形，平均粒径约为4nm。光谱研究表明，碳点具有发射性质，且发射依赖于激发。此外，制备的碳点成功用作检测柠檬黄的荧光探针，检测限为26 nM。通过检测市售软饮料中的痕量柠檬黄，也实现了碳点的灵敏度。总体而言，这项工作展示了将空气污染物烟灰转化为用于传感应用的增值荧光纳米材料。
