Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7140407 | Sensors and Actuators B: Chemical | 2018 | 22 Pages |
Abstract
Electrochemical performance of a 2D Ti3C2Tx (MXene, where T: O, OH, F) sheets modified with Pt nanoparticles (PtNPs) was investigated. The results showed that Ti3C2Tx/PtNP nanocomposite deposited on the surface of GCE showed much better and stable redox behavior in an anodic potential window as compared to the GCE modified with pristine Ti3C2Tx MXene. For example, the H2O2 sensor of Ti3C2Tx/PtNP on GCE offered LOD of 448â¯nM with a potential at which reduction starts of â¼+250â¯mV (vs. Ag/AgCl) in comparison to values of 883â¯Î¼M and â¼â160â¯mV observed for Ti3C2Tx modified GCE. Moreover, the Ti3C2Tx/PtNP sensor could detect small redox molecules such as ascorbic acid (AA), dopamine (DA), uric acid (UA) and acetaminophen (APAP) at a potential higher than +250â¯mV with high selectivity and LOD down to nM level. We proved that selectivity of detection of such molecules (AA, DA, UA and APAP) could be modulated to high extent using external membranes.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Lenka Lorencova, Tomas Bertok, Jaroslav Filip, Monika Jerigova, Dusan Velic, Peter Kasak, Khaled A. Mahmoud, Jan Tkac,