Mxene Quantum Dot Nanosurface Molecularly Imprinted Polymer Resonance Rayleigh Scattering Probe for Highly Sensitive and Selective Determination of Thiocyanate

作者：Zhenmin Li, Qianmiao Chen, Guiqing Wen, Zhiliang Jiang · 发表于：Langmuir · 年份：2024 · DOI：10.1021/acs.langmuir.4c01476 · 被引用次数：10 · 研究领域：Carbon and Quantum Dots Applications、Sulfur Compounds in Biology、Analytical chemistry methods development

In this article, a nanosurface molecularly imprinted polymer (MQD@MIP) resonance Rayleigh scattering (RRS) spectral probe for SCN – was prepared by sol–gel method, using Mxene quantum dot as a matrix, thiocyanate (SCN – ) as a template ion, (3-aminopropyl) triethoxysilane (APTES) as a functional monomer, tetraethoxysilane (TEOS) as the cross-linker, and ammonia as the initiator. The probe produced an RRS peak at 370 nm and exhibits a strong RRS energy transfer (RRS-ET) effect when the MQD@MIP probe identifies SCN – . As the concentration of SCN – increased, the RRS-ET was enhanced, and the signal value of the system decreased linearly at 370 nm, with a determination range of 0.87–5.22 μg/L, and a detection limit of 0.37 μg/L SCN – . This detection method has the characteristics of simplicity, sensitivity, and specific recognition. The RRS method was used to determine SCN – in the sample, with relative standard deviation of 1.95–10.98% and recovery of 89.0–102.8%.