Detection of cadmium ion in aqueous medium by simultaneous measurement of piezoelectric and electrochemical responses
| Autor: | Karunesh Kumar Gupta, Parul Taneja, Raj Kumar Gupta, V. Manjuladevi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology Carbon nanotube Electrochemistry 01 natural sciences law.invention Adsorption law Desorption Materials Chemistry Electrical and Electronic Engineering Thin film Instrumentation Cadmium 010401 analytical chemistry Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Surface-area-to-volume ratio Chemical engineering Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Sensors and Actuators B: Chemical. 268:144-149 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2018.04.091 |
| Popis: | Cadmium is one of the important heavy metals which poses health hazards due to its consumption through potable water. Cadmium is known to form complexes with amine group and also it has good affinity towards carbon nanotubes. The octadecylamine functionalized single-walled carbon nanotubes (ODACNTs) can be employed for sensing cadmium ion in aqueous medium. A thin film of ODACNTs offers not only strong adsorption properties towards cadmium ion but also provides an enormous gain in surface to volume ratio, and good mechanical and chemical stability. Therefore, a sensing layer of ODACNTs was formed on the gold deposited quartz wafer and the sensing towards cadmium ion in the aqueous medium was performed. An experimental setup was designed to record the electrochemical and piezo-responses simultaneously. The piezo and electrochemical responses were found to be linear in the given concentration range. Interestingly, the piezoresponse modulates systematically and repeatedly from a maximum to minimum value due to voltage sweep during cyclic voltammetry indicating the interfacial phenomenon of adsorption and desorption. |
| Databáze: | OpenAIRE |
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