Self-powered photoelectrochemical aptasensor for sensitive detection of Microcystin-RR by integrating TiO2/S-doped Ti3C2 MXene photoanode and MoS2/S-doped Ti3C2 MXene photocathode

Yude Zhang; Xiaojiao Du; Meng Wei; Xueling Shan; Wenchang Wang; Ding Jiang; Hiroshi Shiigi; Zhidong Chen

doi:10.1016/j.aca.2022.340645

Self-powered photoelectrochemical aptasensor for sensitive detection of Microcystin-RR by integrating TiO₂/S-doped Ti₃C₂ MXene photoanode and MoS₂/S-doped Ti₃C₂ MXene photocathode

Anal Chim Acta. 2023 Jan 15:1238:340645. doi: 10.1016/j.aca.2022.340645. Epub 2022 Nov 19.

Authors

Yude Zhang¹, Xiaojiao Du², Meng Wei¹, Xueling Shan¹, Wenchang Wang¹, Ding Jiang³, Hiroshi Shiigi⁴, Zhidong Chen⁵

Affiliations

¹ Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, PR China.
² Oakland International Associated Laboratory, School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213032, PR China; Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou, Jiangsu, 213164, PR China.
³ Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, PR China. Electronic address: jiangding@cczu.edu.cn.
⁴ Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka, 599-8570, Japan.
⁵ Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, PR China. Electronic address: zdchen@cczu.edu.cn.

PMID: 36464455
DOI: 10.1016/j.aca.2022.340645

Abstract

Screening sufficient Fermi level differentiation of photoeletrodes is significantly meaningful for developing high-performance self-powered photoelectrochemical (PEC) sensors. In this work, a dual-photoelectrode self-powered system was fabricated for sensitive detection of Microcystin-RR (MC-RR) by integration of the TiO₂/S-doped Ti₃C₂ photoanode and MoS₂/S-doped Ti₃C₂ photocathode. The introduction of S-doped Ti₃C₂ nanosheets synergistically integrated with semiconductors (TiO₂ and MoS₂) could generate the unique Schottky junctions, which could adjust the Fermi energy levels, facilitate the separation of electron-hole pairs and broaden light absorption, leading to high photoelectric conversion efficiency. The electric output of self-powered sensing systems was increased by the substantial inherent bias between the Fermi energy levels of various photoelectrodes and the complementary functions of Schottky junctions, which provided a necessary foundation for the development of sensitive sensors. After the immobilization of the MC-RR aptamer, a novel signal-off dual-photoelectrode self-powered sensor was constructed for sensitive detection of MC-RR based on steric hindrance effect. Moreover, the as-fabricated sensor exhibited prominent analytical performance including wide detection range (10^-16 M to 10^-9 M), low detection limit (3.4 × 10^-17 M), good selectivity, stability and reproducibility, so as to be successfully applied to real sample analysis. The designing ideas of the proposed S-doped Ti₃C₂ MXene-based Schottky junctions can provide a foothold for the innovative construction of dual-photoelectrode internal-driven self-powered sensing platforms with satisfactory performance.

Keywords: Microcystin-RR; Photoelectrochemical; S-doped Ti(3)C(2) MXene; Self-powered.

MeSH terms

Microcystins*
Molybdenum*
Reproducibility of Results
Titanium

Substances

Microcystins
titanium dioxide
Molybdenum
Titanium