Nanocrystalline Pd:NiFe2O4 thin films: A selective ethanol gas sensor
| Autor: | Pratibha Rao, Sunita Bhagwat, R.V. Godbole |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Analytical chemistry Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material Electronic Optical and Magnetic Materials law.invention SQUID Grain growth chemistry.chemical_compound chemistry law 0103 physical sciences X-ray crystallography Methanol Thin film 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 416:292-298 |
| ISSN: | 0304-8853 |
| Popis: | In this work, Pd:NiFe2O4 thin films were investigated for the detection of reducing gases. These films were fabricated using spray pyrolysis technique and characterized using X-ray diffraction (XRD) to confirm the crystal structure. The surface morphology was studied using scanning electron microscopy (SEM). Magnetization measurements were carried out using SQUID VSM, which shows ferrimagnetic behavior of the samples. These thin film sensors were tested against methanol, ethanol, hydrogen sulfide and liquid petroleum gas, where they were found to be more selective to ethanol. The fabricated thin film sensors exhibited linear response signal for all the gases with concentrations up to 5 w/o Pd. Reduction in optimum operating temperature and enhancement in response was also observed. Pd:NiFe2O4 thin films exhibited faster response and recovery characteristic. These sensors have potential for industrial applications because of their long-term stability, low power requirement and low production cost. |
| Databáze: | OpenAIRE |
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