Enhanced Catalytic Surfaces for Catechol Sensing: Combining Grafted Aryldiazonium Derivative with Cross-Linking Dopamine or Coupling Tyrosinase Immobilizations

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(8), P. 4250 - 4250

Published: April 11, 2025

This study describes the development of catalytic surface immobilizing dopamine via cross-linking or tyrosinase through covalent bonds on an electrografted screen-printed carbon electrode with a 4-nitrobenzenediazonium ion. A simple electrochemical reduction approach was used to covalently graft aryldiazonium ions onto commercial electrodes. After functionalization aminophenyl groups, dopamine, important neurotransmitter, immobilized by imine bond formation using glutaraldehyde as bifunctional molecule. The presence confirmed cyclic voltammetry following response hydroquinone/quinone redox process from catechol functionalities surface, which are responsible for activity. In addition, also characterized probe, [Fe(CN)6]3−/4−, obtaining signal approximately 14 times higher than that bare electrode, achieving dynamic concentration range spanning three orders magnitude. Remarkable sensitivity obtained combining electrografting, in situ diazotation, generate grafted aryl diazonium and coupling reaction anchor enzyme surface. TYR-biosensor towards catechol, probe mediator, 10 modified These surfaces offer promising alternatives voltammetric quantification environmental fields.

Language: Английский

Progress in MXenes and Their Composites as Electrode Materials for Electrochemical Sensing and Dye-Sensitized Solar Cells

Molecules, Journal Year: 2024, Volume and Issue: 29(22), P. 5233 - 5233

Published: Nov. 5, 2024

In the present mini-review article, we have compiled previously reported literature on fabrication of MXenes and their hybrid composite materials based electrochemical sensors for determination phenolic compounds counter electrodes platinum (Pt)-free dye-sensitized solar cells (DSSCs). are two-dimensional (2D) with excellent optoelectronic physicochemical properties. been extensively used in construction cell applications. this paper, reviewed progress materials. addition, co1.unter composites development Pt-free DSSCs. We believe that review article will be beneficial researchers working towards DSSCs using as electrode

Language: Английский

Simultaneous Multiplexed Monitoring of Water Pollutants with a Microfluidic Multichannel Electrochemical Cell

Published: Jan. 1, 2024

Language: Английский