Facile synthesis of mesoporous WS2 nanorods decorated N-doped RGO network modified electrode as portable electrochemical sensing platform for sensitive detection of toxic antibiotic in biological and pharmaceutical samples

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

“…The electrochemical behavior of bare SPCE, CoMn 2 O 4 -400/SPCE, CoMn 2 O 4 -500/SPCE, and CoMn 2 O 4 -600/SPCE was investigated in the presence of 100 μM RXS at the scan rate of 0.05 V s –1 , as shown in Figure B. The electrocatalytic reduction mechanism of RXS is schematized in Scheme based on the literature . After injection of RXS, a prominent reduction peak in the CV curves is observed for bare SPCE, CoMn 2 O 4 -400/SPCE, CoMn 2 O 4 -500/SPCE, and CoMn 2 O 4 -600/SPCE.…”

“…The LOD and the sensitivity of the CoMn 2 O 4 -500-modified electrode are calculated based on the following formulas and The LOD and the sensitivity of the CoMn 2 O 4 -500-based electrochemical sensor are calculated to be 0.002 μM and 33.13 μA μM –1 cm –2 , respectively. Table shows the electroanalytical performance comparison of the CoMn 2 O 4 -500 material with other electrode materials reported in the literature for the RXS detection. ,, The comparison results show that the proposed CoMn 2 O 4 -500 material is much better than most of other electrode materials. The superior electrocatalytic performance of the CoMn 2 O 4 -500-based electrochemical sensor for the RXS detection can be well interpreted by abundant active sites, high conductivity, unique structure, large specific surface area, and rapid transportation.…”

“…However, the organoarsenic compounds were previously used as chemical weapons during the First World War. Especially, roxarsone (RXS) as a kind of organoarsenic compounds becomes one of the most common food additive supplements widely used in the poultry and livestock industry as an anticoccidial agent to prevent disease, regulate growth, control parasites, and improve meat pigmentation. − It has been valued that 1000 tons of RXS was annually consumed by poultry and swine in China . However, more than 90% of unmetabolized RXS is directly excreted in the original form in urine and feces, which leads to environmental pollution. − The toxicity of RXS is increased by being transformed to inorganic arsenic As­(III) and As­(V) through biotic and abiotic paths.…”

“…To date, much effort has been devoted to the development of advantageous methods for the detection of RXS, including capillary electrophoresis, ion chromatography–inductively coupled plasma–mass spectrometry, fluorescence spectroscopy, solid-phase microextraction, surface-enhanced Raman spectroscopy, and high-performance liquid chromatography. − However, these methods heavily rely on professional operators, need costly instrumentation, and could not satisfy the on-field detection of RXS related to food security. The electrochemical method has demonstrated its remarkable sensing capacity with features of high selectivity, low cost, compact feasibility, high sensitivity, short analysis times, portability, and user-friendly procedure. − Chen et al prepared tungsten disulfide nanosheet/nanorod-decorated nitrogen-doped reduced graphene oxide (WS 2 NRs/N-RGO) for the electrochemical detection of RXS with a limit of detection (LOD) of 0.075 μM . Vinoth et al developed a sensitive electrochemical sensor based on lanthanum molybdate (LaMoO) for detecting RXS with a LOD of 0.0124 μM .…”

“…23−27 Chen et al prepared tungsten disulfide nanosheet/nanorod-decorated nitrogen-doped reduced graphene oxide (WS 2 NRs/N-RGO) for the electrochemical detection of RXS with a limit of detection (LOD) of 0.075 μM. 8 Vinoth et al developed a sensitive electrochemical sensor based on lanthanum molybdate (LaMoO) for detecting RXS with a LOD of 0.0124 μM. 28 Govindasamy et al proposed a probe based on WS 2 nanosheets (NSs) for the electrochemical detection of RXS with the LOD of 0.03 μM.…”