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Research Article

Interface electronic engineering of molybdenum sulfide/MXene hybrids for highly efficient biomimetic sensors

Pengfei Wu1Tingting You1Qingyuan Ren1Hongyan Xi1Qingqing Liu1Fengjuan Qin2Hongfei Gu2Yu Wang3Wensheng Yan4Yukun Gao1( )Wenxing Chen2( )Penggang Yin1( )
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
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Graphical Abstract

A providential MoS2/MXene hybrid structure was established through interface electronic engineering for efficient electrocatalytic biomimetic sensors in this work. Benefiting from the strong electronic coupling, atomic defect and tunable coordination bond-length, the 1T-MoS2/Ti3C2TX can be used to detect DA in human body.

Abstract

Interface regulation plays a key role in the electrochemical performance for biosensors. By controlling the interfacial interaction, the electronic structure of active species can be adjusted effectively at micro and nano-level, which results in the optimal reaction energy barrier. Herein, we propose an interface electronic engineering scheme to design a strongly coupled 1T phase molybdenum sulfide (1T-MoS2)/MXene hybrids for constructing an efficient electrocatalytic biomimetic sensor. The local electronic and atomic structures of the 1T-MoS2/Ti3C2TX are comprehensively studied by synchrotron radiation-based X-ray photoelectron spectroscopy (XPS), as well as X-ray absorption spectroscopy (XAS) at atomic level. Experiments and theoretical calculations show that there are interfacial stresses, atomic defects and adjustable bond-length between MoS2/MXene nanosheets, which can significantly promote biomolecular adsorption and rapid electron transfer to achieve excellent electrochemical activity and reaction kinetics. The 1T-MoS2/Ti3C2TX modified electrode shows ultra high sensitivity of 1.198 μA/μM for dopamine detection with low limit of 0.05 μM. We anticipate that the interface electronic engineering investigation could provide a basic idea for guiding the exploration of advanced biosensors with high sensitivity and low detection limit.

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Nano Research
Pages 1158-1164
Cite this article:
Wu P, You T, Ren Q, et al. Interface electronic engineering of molybdenum sulfide/MXene hybrids for highly efficient biomimetic sensors. Nano Research, 2023, 16(1): 1158-1164. https://doi.org/10.1007/s12274-022-5038-3
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Received: 10 May 2022
Revised: 08 September 2022
Accepted: 10 September 2022
Published: 24 October 2022
© Tsinghua University Press 2022
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