Electrochemical Behavior of Three-Dimensional Cobalt Manganate with Flowerlike Structures for Effective Roxarsone Sensing

Abstract

Rational design and construction of the finest electrocatalytic materials are important for improving the performance of electrochemical sensors. Spinel bioxides based on cobalt manganate (CoMn 2 O 4 ) are of particular importance for electrochemical sensors due to their excellent catalytic performance. In this study, three-dimensional CoMn 2 O 4 with the petal-free, flowerlike structure is synthesized by facile hydrothermal and calcination methods for the electrochemical sensing of roxarsone (RXS). The effect of calcination temperature on the characteristics of CoMn 2 O 4 was thoroughly studied by in-depth electron microscopic, spectroscopic, and analytical methods. Compared to previous reports, CoMn 2 O 4 -modified screen-printed carbon electrodes display superior performance for the RXS detection, including a wide linear range (0.01−0.84 μM; 0.84−1130 μM), a low limit of detection (0.002 μM), and a high sensitivity (33.13 μA μM −1 cm −2 ). The remarkable electrocatalytic performance can be attributed to its excellent physical properties, such as good conductivity, hybrid architectures, high specific surface area, and rapid electron transportation. More significantly, the proposed electrochemical sensor presents excellent selectivity, good stability, and high reproducibility. Besides, the detection of RXS in river water samples using the CoMn 2 O 4 -based electrochemical sensor shows satisfactory recovery values in the range of 98.00−99.80%. This work opens a new strategy to design an electrocatalyst with the hybrid architecture for high-performance electrochemical sensing.

Fabrication of Praseodymium Vanadate Nanoparticles on Disposable Strip for Rapid and Real-Time Amperometric Sensing of Arsenic Drug Roxarsone

“…The suggested electrochemical reduction mechanism of RXS encompasses the transfer of four protons and four electrons, as depicted in Figure c. The mechanism reduced RXS to hydroxylamine form from the RXS nitro group. , …”

“…Food essences based on organoarsenic chemicals in cattle husbandry are commonly employed to boost food yield. , However, during the First World War, organoarsenic compounds were used as chemical weapons . Roxarsone (4-hydroxy-3-nitrophenylarsonic acid; RXS) is an antibiotic that contains aromatic organoarsenic. , Several medications containing organoarsenic compounds have also been used to treat severe disorders such as myeloma, acute promyelocytic leukemia, and acute and chronic myeloid leukemia. RXS has become one of the most extensively used food additive supplements in the poultry and cattle industries as an anticoccidial agent to prevent illness, regulate growth, manage parasites, and improve meat coloration.…”

“…Kokulnathan et al (2021) performed electrochemical behavior of cobalt manganate for effective RXS sensing. The cobalt manganate-modified electrode exhibited a 2 nM detection limit and high sensitivity of 33.13 μA μM –1 cm –2 . Dai et al (2015) proposed hematin on carbon nanohorns (H-CNH) for electrochemical RXS detection.…”

“…The cobalt manganate-modified electrode exhibited a 2 nM detection limit and high sensitivity of 33.13 μA μM −1 cm −2 . 5 Dai et al (2015) proposed hematin on carbon nanohorns (H-CNH) for electrochemical RXS detection. H-CNH showed detection limit of 0.5 nM.…”

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

“…Hence, a considerable range of concentrations had to be covered for CT fabrication even at lower levels in the environmental samples. Numerous analytical methods have been established for the determination of CT, which include high-performance liquid chromatography, gas chromatography, flow-injection analysis, chemiluminescence, and electrochemical techniques. − Among these methods, electrochemical techniques are more prominent due to their cost-effectiveness, easy handling, and facile approach for the impulsive monitoring of environmental pollutants. − …”