Graphene oxide quantum dots immobilized on mesoporous silica: preparation, characterization and electroanalytical application
Albina Mikhraliieva, Vladimir Zaitsev, Oleg Tkachenko, Michael Nazarkovsky, Yutao Xing, Edilson Valmir Benvenutti
Abstract
-GOQDs were used as a modifier of a carbon paste electrode for differential pulse voltammetry determination of two antibiotics (sulfamethoxazole and trimethoprim) and two endocrine disruptors (diethylstilbestrol (DES) and estriol (EST)). The modified electrodes demonstrated a significant signal enhancement for EST (370%) and DES (760%), which was explained by a π-π stacking interaction between GOQDs and the aromatic system of the analytes.
Topics & Concepts
GrapheneQuantum dotCharacterization (materials science)NanotechnologyMesoporous silicaOxideMaterials scienceMesoporous materialChemical engineeringChemistryCatalysisOrganic chemistryMetallurgyEngineeringElectrochemical sensors and biosensorsSupercapacitor Materials and FabricationCarbon and Quantum Dots Applications