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. 2021 May 29;188(6):216.
doi: 10.1007/s00604-021-04847-5.

Graphene oxide@Ce-doped TiO2 nanoparticles as electrocatalyst materials for voltammetric detection of hazardous methyl parathion

Raja Nehru  1   2 , Yung-Fu Hsu  3 , Sea-Fue Wang  4 , Cheng-Di Dong  5 , Mani Govindasamy  1 , Mohamed A Habila  6 , Najla AlMasoud  7
Affiliations

Graphene oxide@Ce-doped TiO2 nanoparticles as electrocatalyst materials for voltammetric detection of hazardous methyl parathion

Raja Nehru et al. Mikrochim Acta. .

Abstract

A sensitive voltammetric sensor has been developed for hazardous methyl parathion detection (MP) using graphene oxide@Ce-doped TiO2 nanoparticle (GO@Ce-doped TiO2 NP) electrocatalyst. The GO@Ce-doped TiO2 NPs were prepared through the sol-gel method and characterized by various physicochemical and electrochemical techniques. The GO@Ce-doped TiO2 NP-modified glassy carbon electrode (GCE) addresses excellent electrocatalytic activity towards MP detection for environmental safety and protection. The developed strategy of GO@Ce-doped TiO2 NPs at GCE surfaces for MP detection achieved excellent sensitivity (2.359 μA μM-1 cm-2) and a low detection limit (LOD) 0.0016 μM with a wide linear range (0.002 to 48.327 μM). Moreover, the fabricated sensor shows high selectivity and long-term stability towards MP detection; this significant electrode further paves the way for real-time monitoring of environmental quantitative samples with satisfying recoveries.

Keywords: Environmental monitoring; Modified electrode; Pesticide sensor; Rare-earth doping; Titanium dioxide (TiO2).

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