Institute of New Carbon Materials, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China.
Institute of New Carbon Materials, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China; National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 5;284:121770. doi: 10.1016/j.saa.2022.121770. Epub 2022 Aug 29.
Quinoline, as a refractory and toxic organic pollutant in coking wastewater, causes great harm to the environment and human health even in trace amount. To realize the selective and sensitive detection of quinoline in coking wastewater, a novel molecularly imprinted fluorescent nanopomegranate with carbon dots (CDs) as seeds and fluorescence source (CD-MIP) was prepared, using quinoline as the template, and N-(β-aminoethyl)-γ-aminopropyl trimethoxysilane (KH792) as the monomer. The preparation and detection conditions of CD-MIP were systematically optimized. The structure and detection performance of CD-MIP were investigated in detail. The resulting CD-MIP exhibits excellent photoluminescence performance, high detection sensitivity, good selectivity and reproducibility towards quinoline. Under the optimized conditions, the fluorescence intensity of CD-MIP shows a satisfying linearity with quinoline concentration in the range of 20-200 mg/L with a detection limit of 6.7 mg/L. Owing to the existence of imprinted cavities that highly match with quinoline, a high imprinting factor (3.46) for CD-MIP was obtained. In addition, CD-MIP represents a greater affinity towards quinoline than towards other analogues, as well as an outstanding anti-interference capability. For trace analysis in real coking wastewater, CD-MIP also gives satisfactory results. Therefore, CD-MIP shows promising application in the selective detection of trace quinoline in wastewater.
喹啉作为焦化废水中一种难处理的有毒有机污染物，即使在痕量水平下，也会对环境和人体健康造成极大危害。为了实现焦化废水中喹啉的选择性和灵敏检测，制备了一种以喹啉为模板、以 N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷(KH792)为单体、以碳点(CDs)为种子和荧光源的新型分子印迹荧光石榴纳米粒子(CD-MIP)。系统优化了 CD-MIP 的制备和检测条件，并详细研究了 CD-MIP 的结构和检测性能。所得 CD-MIP 对喹啉表现出优异的光致发光性能、高检测灵敏度、良好的选择性和重现性。在优化条件下，CD-MIP 的荧光强度在 20-200mg/L 范围内与喹啉浓度呈良好的线性关系，检测限为 6.7mg/L。由于存在与喹啉高度匹配的印迹空穴，CD-MIP 获得了较高的印迹因子(3.46)。此外，CD-MIP 对喹啉的亲和力大于对其他类似物的亲和力，并且具有出色的抗干扰能力。对于实际焦化废水中痕量分析，CD-MIP 也给出了令人满意的结果。因此，CD-MIP 在废水痕量喹啉的选择性检测中具有广阔的应用前景。
