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Large interlayer spacing Nb4C3T x (MXene) promotes the ultrasensitive electrochemical detection of Pb2+ on glassy carbon electrodes.

ABSTRACT: A Nb4C3T x (MXene)-modified glassy carbon electrode was used for the electrochemical detection of Pb2+ ions in aqueous media. The sensing platform was evaluated by anodic stripping analysis after optimizing the influencing factors such as pH, deposition potential, and time. The large interlayer spacing, high c lattice parameter and higher conductivity of Nb4C3T x compared to other MXenes enhance the electrochemical detection of Pb2+. The developed sensor can reach a detection limit of 12 nM at a potential ∼-0.6 V. Additionally, the developed sensor showed promising selectivity in the presence of Cu2+ and Cd2+, and stability for at least 5 cycles of continuous measurements with good repeatability. This work demonstrates the potential applications of Nb4C3T x towards the development of effective electrochemical sensors.

SUBMITTER: Rasheed PA 

PROVIDER: S-EPMC9055209 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Large interlayer spacing Nb<sub>4</sub>C<sub>3</sub>T <sub><i>x</i></sub> (MXene) promotes the ultrasensitive electrochemical detection of Pb<sup>2+</sup> on glassy carbon electrodes.

Rasheed P Abdul PA   Pandey Ravi P RP   Gomez Tricia T   Naguib Michael M   Mahmoud Khaled A KA  

RSC advances 20200629 41

A Nb<sub>4</sub>C<sub>3</sub>T <sub><i>x</i></sub> (MXene)-modified glassy carbon electrode was used for the electrochemical detection of Pb<sup>2+</sup> ions in aqueous media. The sensing platform was evaluated by anodic stripping analysis after optimizing the influencing factors such as pH, deposition potential, and time. The large interlayer spacing, high <i>c</i> lattice parameter and higher conductivity of Nb<sub>4</sub>C<sub>3</sub>T <sub><i>x</i></sub> compared to other MXenes enhance the  ...[more]

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