Synergetic Sensing Effect of Sodium Carboxymethyl Cellulose and Bismuth on Cadmium Detection by Differential Pulse Anodic Stripping Voltammetry
| Autor: | Faxiang Wang, Jiaqian Wei, Wang Jianhui, Xin Luo, Donger Chen, Donglin Liu, Liu Dongmin, Shouen Huang, Ning Jingheng, Yongle Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
Materials science Stripping (chemistry) Metal ions in aqueous solution chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Article Analytical Chemistry Bismuth bismuth medicine Electrical and Electronic Engineering sodium carboxymethyl cellulose cadmium detection Instrumentation Detection limit Cadmium 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Carboxymethyl cellulose Electrochemical gas sensor differential pulse anodic stripping voltammetry Anodic stripping voltammetry chemistry 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | Sensors Volume 19 Issue 24 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s19245482 |
| Popis: | 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 &mu mol/L&ndash 1 &mu mol/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. |
| Databáze: | OpenAIRE |
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