Room Temperature Detection of Acetone by a PANI/Cellulose/WO3 Electrochemical Sensor
| Autor: | Alfredo Márquez-Lucero, Velia Osuna, Alejandro Vega-Rios, Eider Aparicio-Martínez, E. Armando Zaragoza-Contreras, Rocio B. Dominguez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Article Subject Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Tungsten trioxide 0104 chemical sciences Electrochemical gas sensor Dielectric spectroscopy chemistry.chemical_compound symbols.namesake chemistry Polyaniline lcsh:Technology (General) Acetone symbols lcsh:T1-995 General Materials Science Cyclic voltammetry 0210 nano-technology High-resolution transmission electron microscopy Raman spectroscopy |
| Zdroj: | Journal of Nanomaterials, Vol 2018 (2018) |
| ISSN: | 1687-4110 |
| DOI: | 10.1155/2018/6519694 |
| Popis: | Chemical sensing based on semiconducting metal oxides has been largely proposed for acetone sensing, although some major technical challenges such as high operating temperature still remain unsolved. This work presents the development of an electrochemical sensor based on nanostructured PANI/cellulose/WO3composite for acetone detection at room temperature. The synthesized materials for sensor preparation were polyaniline (PANI) with a conductivity of 13.9 S/cm and tungsten trioxide (WO3) in monoclinic phase doped with cellulose as carbon source. The synthesized materials were characterized by high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), cyclic voltammetry (CV), and Raman spectroscopy. The composite was applied for acetone detection in the range of 0 to 100 ppmv at room temperature with electrochemical impedance spectroscopy (EIS) for monitoring resistance changes proportional to acetone concentration. The developed sensor achieved a calculated limit of detection of 10 ppm andR2of 0.99415 with a RSD of 5% (n=3) at room temperature. According to these results, the developed sensor is suitable for acetone sensing at room temperatures without the major shortcomings of larger systems required by high operating temperatures. |
| Databáze: | OpenAIRE |
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