One-step electrodeposition of high-quality amorphous molybdenum sulfide/RGO photoanode for visible-light sensitive photoelectrochemical biosensing

• Published in: Sensors and actuators. B, Chemical Vol. 266; pp. 71 - 79
• Main Authors: Shang, Mengxiang, Qi, Hui, Du, Cuicui, Huang, Hao, Wu, Siyuan, Zhang, Jinling, Song, Wenbo
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.08.2018; Elsevier Science Ltd
• Subjects: Amorphous molybdenum sulfide/RGO; Biosensors; Electrodeposition; Electromagnetic absorption; Glucose; High-quality photoanode; Indium tin oxides; Molybdenum; One-step electrodeposition; Photoanodes; Photoelectric effect; Photoelectric emission; Photoelectricity; Photoelectrochemical sensor; Stability; Tin oxides; Visible light sensitive; Photoelectrochemical sensor; Visible light sensitive; Amorphous molybdenum sulfide/RGO; One-step electrodeposition; High-quality photoanode
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2018.03.117

[Display omitted] •One-step electrodeposition of amorphous MoSx/RGO hybrid film as high-quality photoanode for PEC sensing is demonstrated for the first time.•Enhanced photocurrent with robust stability and fast photoelectric switching under visible light on/off illumination are achieved.•Rapid response, wide linear detection range, low detection limit, and excellent stability for glucose determination are realized. Exploiting high-quality photoactive material with visible light absorption, high photoelectrochemical (PEC) activity and stability is of great importance for developing high-performance PEC sensing. In this paper, amorphous molybdenum sulfide (a-MoSx)/reduced graphene oxide (RGO) hybrid film was directly grown on indium tin oxide (ITO) via a facile one-step electrodeposition, followed by a post annealing process. The uniform a-MoSx/RGO hybrid film exhibited significantly enhanced photocurrent, fast photoelectric switching behavior and robust stability under the visible light. Direct utilization of a-MoSx/RGO as an efficient photoanode for glucose determination had been demonstrated for the first time. Rapid response and robust stability for glucose determination in a wide linear range from 0.15 to 16 mM with a low detection limit were obtained. The reliability of detecting glucose in serum samples was demonstrated. This work stresses the importance of one-step electrodeposition preparation of a-MoSx/RGO hybrid film as high-quality photoanode for PEC bioanalysis.