A photoelectrochemical sensor for glutathione based on Bi2S3-modified TiO2 nanotube arrays. (11th April 2022)

• Record Type: Journal Article
• Authors: Wang, Mengyan; Zhan, Yi; Wang, Hanxiao; Zhang, Chi; Li, Gaiping; Zou, Lina
• Is Part Of: New journal of chemistry. Volume 46:Number 17(2022)
• Page Start: 8162
• Page End: 8170
• Publication Date: 2022-04-11
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj06045g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A novel photoelectrochemical sensor for the determination of glutathione based on Bi2 S3 -modified TiO2 nanotube arrays. Under the excitation of visible light, glutathione can be oxidized by the holes created by the Bi2 S3 /TiO2 NTAs. Abstract : A novel photoelectrochemical sensor was designed for the determination of glutathione based on Bi2 S3 -modified TiO2 nanotube arrays. Combined with anodization and a successive ionic layer adsorption reaction, a highly ordered and controllable nano array heterojunction was systematically constructed. The results of characterization prove that it can enhance the light absorption efficiency and accelerate the charge transfer. Under visible light excitation and a bias voltage of 0.65 V, the proposed PEC sensor exhibited a sensitive response for glutathione with a linear range from 15.0 μmol L −1 to 200 μmol L −1 and a detection limit of 7.00 μmol L −1 (S/N = 3). It also demonstrated good stability and reproducibility. In addition, this approach was successfully applied for the determination of glutathione in actual reduced glutathione tablets with satisfactory results.