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Design and Development of Rhodamine B Sensitive Electrode for Cotton Candy and DFT Studies
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DOI：10.1007/s11947-026-04520-w.png)
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Abstract
En 中文
The article investigates a new and quick electrocatalytic oxidative behaviour of rhodamine B at the modified screen-printed electrode. The promising electrocatalytic properties of the transition metal dichalcogenide, molybdenum disulfide combined with biocompatible silicic acid have been exploited to quantify rhodamine B through cyclic and differential pulse voltammetric techniques. The rhodamine B is carcinogenic, mutagenic, and genotoxic nature which has restricted its use as a food additive in many countries. The fabricated sensor exhibited a linear concentration range from 20 to 2000 nM with a nanomolar lower detection value of 0.141 nM and a limit of quantification value of 0.471 nM. The sensor shows an enhanced sensitivity of 250.598 µA/nM/cm2 with appreciable stability, selectivity, and reproducibility. The oxidation of rhodamine B has been validated by UV–visible spectroscopy both experimentally and computationally. This sensitive and portable silicic acid/molybdenum disulfide modified screen-printed electrode enables reliable detection of Rhodamine B in cotton candy for practical food safety monitoring.
Keywords:
Rhodamine B
Screen printed electrode
Sensors
Nanomolar detection
DFT studies
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