A molecularly imprinted photoelectrochemical sensor based on an rGO/MoSSe heterojunction for the detection of chlortetracycline

• Published in: Analyst (London) Vol. 149; no. 7; pp. 223 - 233
• Main Authors: Huang, Wanjin, Tang, Shufei, Xiao, Wei, Chen, Yafei, Li, Lijun, Li, Jianping
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 25.03.2024
• Subjects: Electrodes; Electron transfer; Electrons; Graphene; Heterojunctions; Imprinted polymers; Phenylenediamine; Photoelectricity; Polymerization; Sensitivity enhancement; Sensors
• ISSN: 0003-2654; 1364-5528
• 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 in situ 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 o -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 −13 -5 × 10 −9 mol L −1 with a detection limit of 1.57 × 10 −13 mol L −1 . The sensor has been applied to the determination of chlortetracycline in animal-derived food samples. A reduced graphene oxide/molybdenum selenosulfide (rGO/MoSSe) heterojunction was synthesized, and a molecularly imprinted photoelectrochemical sensor for the detection of chlortetracycline was prepared.