Hydrovoltaic Effect Coupling with Capacitor Amplification: A Mode for Sensitive Self-Powered Electrochemical Sensing

Self-powered electrochemical sensors, which can function without external electricity, are incredibly valuable in the realm of sensing. However, most of the present testing methods are normally confined to high environmental requirements, restricted lighting conditions, and temperature differences....

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2023-08, Vol.95 (34), p.12595-12599
Main Authors: Ding, Hanling, Jiang, Ding, Du, Xiaojiao, Zhang, Zilian, Jiang, Jinghan, Shan, Xueling, Wang, Wenchang, Shiigi, Hiroshi, Chen, Zhidong
Format: Article
Language:English
Subjects:
Amplification
Capacitors
Chemical sensors
Chemistry
Coupling
Electrochemical analysis
Electrochemistry
Energy harvesting
Enrofloxacin
Environmental requirements
Evaporation
Metal carbides
Polyanilines
Sensors
Short circuit currents
Short-circuit current
Temperature requirements
Transition metals
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Summary:Self-powered electrochemical sensors, which can function without external electricity, are incredibly valuable in the realm of sensing. However, most of the present testing methods are normally confined to high environmental requirements, restricted lighting conditions, and temperature differences. Herein, an innovative self-powered electrochemical sensor was successfully developed based on hydrovoltaic effect coupling with capacitor amplification. Due to the combined merits from the two-dimensional transition metal carbides and nitrides (MXene)–polyaniline (PANI) with high surface potential and good hydrophilicity, and the capacitor amplification strategy, the device could harvest electric energy from water evaporation and displayed a high short circuit current value. Under optimal conditions, the proposed self-powered electrochemical sensor presented excellent sensitivity and high specificity for enrofloxacin (ENR) detection in the concentration range from 1 fM to 1 nM with a detection limit of 0.585 fM. Such a proposed sensor also has the advantages of environmental friendliness and ease of use, which is an ideal choice for accurately and precisely detecting ENR in real samples. The mode of such electrochemical detection outlined in this technical note implements a breakthrough in designing self-powered electrochemical sensors, providing a rational basis for development of a diversified sensing platform.
ISSN:0003-2700
1520-6882
DOI:10.1021/acs.analchem.3c01283