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Open AccessArticle

Synergetic Sensing Effect of Sodium Carboxymethyl Cellulose and Bismuth on Cadmium Detection by Differential Pulse Anodic Stripping Voltammetry

School of Chemistry and Food Engineering, Changsha University of Science & Technology, Changsha 410110, China
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Sensors 2019, 19(24), 5482; https://doi.org/10.3390/s19245482
Received: 22 November 2019 / Revised: 7 December 2019 / Accepted: 10 December 2019 / Published: 12 December 2019
In the present work, a novel electrochemical sensor was developed for the detection of trace cadmium with high sensitivity and selectivity in an easy and eco-friendly way. Firstly, a glassy carbon electrode (GCE) was modified with nontoxic sodium carboxymethyl cellulose (CMC) by a simple drop-casting method, which was applied to detect cadmium by differential pulse anodic stripping voltammetry (DPASV) in a solution containing both target cadmium and eco-friendly bismuth ions, based on a quick electro-codeposition of these two metal ions on the surface of the modified electrode (CMC-GCE). Investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR), both CMC (with good film-forming ability) and bismuth (with well-defined stripping signal) were found to be well complexed with target cadmium, leading to vital signal amplification for cadmium detection at a sub-nanomolar level. Under the optimal conditions, the proposed sensor exhibited a good linear stripping signal response to cadmium (Ⅱ) ion, in a concentration range of 0.001 μmol/L–1 μmol/L with a limit of detection of 0.75 nmol/L (S/N = 3). Meanwhile, the results demonstrate that this novel electrochemical sensor has excellent sensitivity and reproducibility, which can be used as a promising detection technique for testing natural samples such as tap water. View Full-Text
Keywords: sodium carboxymethyl cellulose; bismuth; differential pulse anodic stripping voltammetry; cadmium detection sodium carboxymethyl cellulose; bismuth; differential pulse anodic stripping voltammetry; cadmium detection
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MDPI and ACS Style

Ning, J.; Luo, X.; Wang, F.; Huang, S.; Wang, J.; Liu, D.; Liu, D.; Chen, D.; Wei, J.; Liu, Y. Synergetic Sensing Effect of Sodium Carboxymethyl Cellulose and Bismuth on Cadmium Detection by Differential Pulse Anodic Stripping Voltammetry. Sensors 2019, 19, 5482. https://doi.org/10.3390/s19245482

AMA Style

Ning J, Luo X, Wang F, Huang S, Wang J, Liu D, Liu D, Chen D, Wei J, Liu Y. Synergetic Sensing Effect of Sodium Carboxymethyl Cellulose and Bismuth on Cadmium Detection by Differential Pulse Anodic Stripping Voltammetry. Sensors. 2019; 19(24):5482. https://doi.org/10.3390/s19245482

Chicago/Turabian Style

Ning, Jingheng; Luo, Xin; Wang, Faxiang; Huang, Shouen; Wang, Jianhui; Liu, Dongmin; Liu, Donglin; Chen, Donger; Wei, Jiaqian; Liu, Yongle. 2019. "Synergetic Sensing Effect of Sodium Carboxymethyl Cellulose and Bismuth on Cadmium Detection by Differential Pulse Anodic Stripping Voltammetry" Sensors 19, no. 24: 5482. https://doi.org/10.3390/s19245482

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