A Pt/TiO2 Nanotube Array Electrode for Glucose Detection and Its Photoelectrocatalysis Self-Cleaning Ability. Issue 2 (28th December 2016)

• Record Type: Journal Article
• Authors: Chen, Jian; Kang, Yuan; Li, Can; Chen, Hui; Sun, Lei; Wang, Yan; Zhong, Shian
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 2(2017)
• Page Start: B66
• Page End: B73
• Publication Date: 2016-12-28
• Subjects: glucose -- photoelectrocatalysis -- Pt nanoparticles -- self-cleaning -- TiO2 nonatube array; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0921702jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : A non-enzymatic amperometric glucose sensor was prepared based on Pt-decorated TiO2 nanotube array (NTA). TiO2 NTA was obtained through anodization, and Pt nanoparticles were loaded onto the TiO2 NTA by ion exchange. The prepared electrode exhibited a decent sensitivity of 1.01386 × 10 −4 A mM −1 cm −2 at a very low potential and a detection limit of 0.2 mM glucose at a signal-to-noise ratio of 3. The mechanism of glucose electrocatalytic oxidation was also examined and a two-electronic decomposition reaction was observed. It was found that the electrode possessed outstanding self-cleaning ability such that it can be restored and used stably after being contaminated. Details of the self-cleaning process were further explored, and the polluted electrode proved to be able to clean itself after 50 cycles of cyclic voltammetry from –0.7 V to 1 V at 2.8 mW/cm 2 light intensity at wavelength of 365 nm. The research results shed new light on glucose detection with Pt/TiO2 NTA electrode and provide a new way to renew the electrode surface by photoelectrocatalysis self-cleaning.