Fabrication of CeO2/GCE for Electrochemical Sensing of Hydroquinone

Abstract

Hydroquinone is a widely used derivative of phenol which has a negative influence on human beings and the environment. The determination of the accurate amount of hydroquinone is of great importance. Recently, the fabrication of an electrochemical sensing device has received enormous attention. In this study, we reported on the facile synthesis of cerium dioxide (CeO2) nanoparticles (NPs). The CeO2 NPs were synthesized using cerium nitrate hexahydrate as a precursor. For determining the physicochemical properties of synthesized CeO2 NPs, various advanced techniques, viz., powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS), were studied. Further, these synthesized CeO2 NPs were used for the modification of a glassy carbon electrode (CeO2/GCE), which was utilized for the sensing of hydroquinone (HQ). A decent detection limit of 0.9 µM with a sensitivity of 0.41 µA/µM cm2 was exhibited by the modified electrode (CeO2/GCE). The CeO2/GCE also exhibited good stability, selectivity, and repeatability towards the determination of HQ.

Polypyrrole/α-Fe2O3 Hybrids for Enhanced Electrochemical Sensing Performance towards Uric Acid

“…Electrochemical-based sensors have been extensively employed for the detection of environmental pollutants such as heavy metals (e.g., arsenic, cadmium, mercury, lead, and chromium) [10][11][12][13][14][15] as well as organic pollutants, including toxins, pesticides, antibiotics, phenolics, etc. [16][17][18][19]. With technological advancements, electrochemical biosensing technology is gradually replacing traditional biological sensing techniques for various applications like dopamine and glucose detection.…”

Synchronized electrochemical detection of hydroquinone and catechol in real water samples using a Co@SnO2–polyaniline composite

“…Additionally, it encourages marine mussel adhesion and erosion to maritime infrastructure, which is detrimental to the development of marine resources. [13][14][15] Pollutants like hydroquinone and its isomers must be detected in saltwater if the ocean economy is to grow sustainably. Detection pretreatment methods, such as decreasing pH and removing contaminant ions, 8,16,17 are hindered by seawater's alkaline environment and ion concentration.…”