Organophosphorus Pesticide Photoelectrochemical/Electrochemical Dual-Mode Smartsensors Derived from Synergistic Co,N-TiO2@ZrO2/3DGH Platform DOI Creative Commons

Z.J. Zhang,

Hongting Ma, Hao Mo

et al.

Chemosensors, Journal Year: 2025, Volume and Issue: 13(5), P. 167 - 167

Published: May 5, 2025

Organophosphorus pesticides (OPs), while pivotal for agricultural productivity, pose severe environmental and health risks due to their persistence bioaccumulation. Existing detection methods, such as chromatography spectroscopy, face limitations in field adaptability, cost, operational complexity. To address these challenges, this study introduces a novel dual-mode photoelectrochemical–electrochemical (PEC-EC) sensor based on Co,N-TiO2@ZrO2/3DGH nanocomposite. The synergistically integrates zirconium oxide (ZrO2) selective OP capture via phosphate-Zr coordination, cobalt-nitrogen co-doped titanium dioxide (Co,N-TiO2) visible-light responsiveness, three-dimensional graphene hydrogel (3DGH) enhanced conductivity. In the PEC mode under light irradiation, adsorption induces charge recombination, yielding logarithmic photocurrent attenuation with limit of 0.058 ng mL−1. Subsequently, EC square wave voltammetry (SWV) self-validates results, achieving 0.716 system demonstrates exceptional reproducibility, long-term stability, selectivity against common interferents. Parallel measurements revealed <5% inter-mode discrepancy, validating intrinsic self-checking capability. This portable platform bridges gap between laboratory-grade accuracy field-deployable simplicity, offering transformative potential monitoring food safety management.

Language: Английский

Organophosphorus Pesticide Photoelectrochemical/Electrochemical Dual-Mode Smartsensors Derived from Synergistic Co,N-TiO2@ZrO2/3DGH Platform DOI Creative Commons

Z.J. Zhang,

Hongting Ma, Hao Mo

et al.

Chemosensors, Journal Year: 2025, Volume and Issue: 13(5), P. 167 - 167

Published: May 5, 2025

Organophosphorus pesticides (OPs), while pivotal for agricultural productivity, pose severe environmental and health risks due to their persistence bioaccumulation. Existing detection methods, such as chromatography spectroscopy, face limitations in field adaptability, cost, operational complexity. To address these challenges, this study introduces a novel dual-mode photoelectrochemical–electrochemical (PEC-EC) sensor based on Co,N-TiO2@ZrO2/3DGH nanocomposite. The synergistically integrates zirconium oxide (ZrO2) selective OP capture via phosphate-Zr coordination, cobalt-nitrogen co-doped titanium dioxide (Co,N-TiO2) visible-light responsiveness, three-dimensional graphene hydrogel (3DGH) enhanced conductivity. In the PEC mode under light irradiation, adsorption induces charge recombination, yielding logarithmic photocurrent attenuation with limit of 0.058 ng mL−1. Subsequently, EC square wave voltammetry (SWV) self-validates results, achieving 0.716 system demonstrates exceptional reproducibility, long-term stability, selectivity against common interferents. Parallel measurements revealed <5% inter-mode discrepancy, validating intrinsic self-checking capability. This portable platform bridges gap between laboratory-grade accuracy field-deployable simplicity, offering transformative potential monitoring food safety management.

Language: Английский

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