College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China.
Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou, China.
Analyst. 2024 Mar 25;149(7):2023-2033. doi: 10.1039/d4an00172a.
A reduced graphene oxide/molybdenum selenosulfide (rGO/MoSSe) heterojunction was synthesized, and a molecularly imprinted photoelectrochemical sensor for the detection of chlortetracycline was prepared. MoSSe was grown on rGO by a hydrothermal method to form an rGO/MoSSe heterojunction, which acts as the sensitive film of the sensor. Since rGO can promote electron transfer and effectively inhibit electron-hole recombination, it effectively reduces the recombination probability of electrons and holes and improves the photoelectric efficiency, thus enhancing the detection sensitivity of the PEC sensor. The rGO/MoSSe was immobilized on an FTO electrode, and molecularly imprinted polymers (MIPs) were prepared by electropolymerization on the rGO/MoSSe-modified FTO electrode with chlortetracycline as the template molecule and -phenylenediamine as the functional monomer, so as to construct a molecularly imprinted photoelectrochemical (MIP-PEC) sensor. The determination of chlortetracycline was realized by the strategy of a "gate-controlled effect", and the detection range of the chlortetracycline concentration was 5.0 × 10-5 × 10 mol L with a detection limit of 1.57 × 10 mol L. The sensor has been applied to the determination of chlortetracycline in animal-derived food samples.
一种还原氧化石墨烯/二硫化钼硒（rGO/MoSSe）异质结被合成，并制备了用于检测金霉素的分子印迹光电化学传感器。MoSSe 通过水热法生长在 rGO 上形成 rGO/MoSSe 异质结，作为传感器的敏感膜。由于 rGO 可以促进电子转移并有效抑制电子-空穴复合，因此它可以有效降低电子和空穴的复合概率，提高光电效率，从而提高 PEC 传感器的检测灵敏度。rGO/MoSSe 被固定在 FTO 电极上，并通过在 rGO/MoSSe 修饰的 FTO 电极上电聚合以金霉素为模板分子和 -苯二胺为功能单体，制备分子印迹聚合物（MIPs），从而构建了分子印迹光电化学（MIP-PEC）传感器。通过“门控效应”的策略实现了金霉素的测定，金霉素浓度的检测范围为 5.0×10-5×10 mol L，检测限为 1.57×10 mol L。该传感器已应用于动物源性食品样品中金霉素的测定。
