Platinum and Iridium Oxide Co-modified TiO2 Nanotubes Array Based Photoelectrochemical Sensors for Glutathione

Jing Tian; Peng Zhao; Shasha Zhang; Guona Huo; Zhaochen Suo; Zhao Yue; Shoumin Zhang; Weiping Huang; Baolin Zhu

doi:10.3390/nano10030522

Platinum and Iridium Oxide Co-modified TiO₂ Nanotubes Array Based Photoelectrochemical Sensors for Glutathione

Nanomaterials (Basel). 2020 Mar 13;10(3):522. doi: 10.3390/nano10030522.

Authors

Jing Tian¹, Peng Zhao¹, Shasha Zhang¹, Guona Huo¹, Zhaochen Suo¹, Zhao Yue², Shoumin Zhang¹, Weiping Huang¹, Baolin Zhu^{1

3}

Affiliations

¹ College of Chemistry, The Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Tianjin Key Lab of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China.
² Department of Microelectronics, Nankai University, Tianjin 300350, China.
³ National Demonstration Center for Experimental Chemistry Education (Nankai University), Tianjin 300071, China.

Abstract

Oriented TiO₂ nanotubes, which are fabricated by anodic oxidation method, are prospective in photoelectrochemical analysis and sensors. In this work, Pt and IrO₂ co-modified TiO₂ nanotubes array was prepared via a two-step deposition process involving the photoreductive deposition of Pt and chemical deposition of IrO₂ on the oriented TiO₂ nanotubes. Due to the improved separation of photo-generated electrons and holes, Pt-IrO₂ co-modified TiO₂ nanotubes presented significantly higher PEC activity than pure TiO₂ nanotubes or mono-modified TiO₂ nanotubes. The PEC sensitivity of Pt-IrO₂ co-modified TiO₂ nanotubes for glutathione was also monitored and good sensitivity was observed.

Keywords: IrO2; Pt; TiO2 nanotubes array/Ti electrode; co-modification; glutathione; photoelectrochemical sensor.

Abstract

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