Sanni Saheed O, Bayode Ajibola A, Brink Hendrik G, Haneklaus Nils H, Fu Lin, Shang Jianping, Fan Hua-Jun Shawn
College of Chemical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Pretoria 0028, South Africa.
J Xenobiot. 2025 Mar 11;15(2):43. doi: 10.3390/jox15020043.
Over the years, the abuse of antibiotics has increased, leading to their presence in the environment. Therefore, a sustainable method for detecting these substances is crucial. Researchers have explored biomass-based carbon dots (CDs) to detect various contaminants, due to their low cost, environmental friendliness, and support of a circular economy. In our study, we reported the synthesis of CDs using pinecones (PCs) and pinebark (PB) through a sustainable microwave method. We characterized the PCCDs and PBCDs using X-ray diffraction, Raman spectroscopy, Transmission Electron Microscope, and Fourier transform infrared, Ultraviolet-visible, and photoluminescence (PL) spectroscopy. The PCCDs and PBCDs were tested for the detection of amoxicillin (AMX) and tetracycline (TC). The results indicated that the sizes of the PCCDs and PBCDs were 19.2 nm and 18.39 nm, respectively, and confirmed the presence of the 002 plane of the graphitic carbon structure. They exhibited excitation wavelength dependence, good stability, and quantum yields ranging from 6% to 11%. PCCDs and PBCDs demonstrated "turn-off" detection for TC and AMX. The limits of detection (LOD) for TC across a broader concentration range were found to be 0.062 µM for PCCDs and 0.2237 µM for PBCDs. For AMX detection, PBCDs presented an LOD of 0.49 µM.
多年来，抗生素的滥用现象日益严重，导致其在环境中出现。因此，一种可持续的检测这些物质的方法至关重要。研究人员探索了基于生物质的碳点（CDs）来检测各种污染物，因为它们成本低、环境友好且支持循环经济。在我们的研究中，我们报告了通过可持续微波法使用松果（PCs）和松树皮（PB）合成碳点的过程。我们使用X射线衍射、拉曼光谱、透射电子显微镜以及傅里叶变换红外光谱、紫外可见光谱和光致发光（PL）光谱对松果碳点（PCCDs）和松树皮碳点（PBCDs）进行了表征。对PCCDs和PBCDs进行了阿莫西林（AMX）和四环素（TC）检测测试。结果表明，PCCDs和PBCDs的尺寸分别为19.2纳米和18.39纳米，并证实了石墨碳结构002平面的存在。它们表现出激发波长依赖性、良好的稳定性以及6%至11%的量子产率。PCCDs和PBCDs对TC和AMX表现出“猝灭”检测。在更宽的浓度范围内，PCCDs对TC的检测限为0.062微摩尔/升，PBCDs为0.2237微摩尔/升。对于AMX检测，PBCDs的检测限为0.49微摩尔/升。
