Pramod K. Kalambate, Sharad S. Upadhyay, Shambhavi Singh, Wanida Laiwattanapaisal, Dhanjai
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Disposable paper-based electrochemical sensor for hydroquinone detection in environmental samples using a MXene-CNT hybrid composite
This study investigates the electrochemical performance of MXene/multi-walled carbon nanotubes (MWCNT) composite-based sensor and its comparison with MWCNT for the sensitive detection of hydroquinone (HQ) in undiluted water samples. The sensor employs custom-made screen-printed carbon electrodes modified with Ti3C2Tx/MWCNT, allowing for rapid fabrication and integration of the working, reference, and counter electrodes into a compact, portable device. The multilayer MXene provides a large specific surface area, while MWCNT enhances electrical conductivity, enabling clear electrochemical signals even in complex sample matrices. The MWCNT/SPCE and Ti3C2Tx/MWCNT/SPCE sensors demonstrated excellent sensitivity, achieving low detection limits of 0.055 µM and 0.261 µM, with wide Linear ranges of 3–600 µM and 6–900 µM, respectively. The sensor demonstrates strong selectivity for HQ with minimal interference from coexisting species and requires little to no sample preparation, offering a feasible approach for real-time environmental monitoring.
期刊介绍：
As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.
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