High response and low concentration hydrogen gas sensing properties using hollow ZnO particles transformed from polystyrene@ZnO core-shell structures
| Autor: | Eun-Kyung Suh, Yousheng Wang, Rafiq Ahmad, Yoon-Bong Hahn, Yeon-Tae Yu, Pramila Patil, Kiesar Sideeq Bhat, Tahmineh Mahmoudi, Umesh T. Nakate |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Thermal treatment 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Field emission microscopy symbols.namesake Fuel Technology X-ray photoelectron spectroscopy chemistry Transmission electron microscopy symbols Nanorod Selected area diffraction 0210 nano-technology Raman spectroscopy |
| Zdroj: | International Journal of Hydrogen Energy. 44:15677-15688 |
| ISSN: | 0360-3199 |
| Popis: | High quality, closely packed nanorods (NRs) textured ZnO hollow particles were prepared via thermal treatment of polystyrene@ZnO core-shell structures at 300 °C. Polystyrene@ZnO core-shell structures were synthesized using a chemical route. These hollow ZnO particles were investigated for hydrogen gas sensing properties. Morphological properties were studied using field emission scanning electron microscope (FE-SEM). Structural parameters and molecular fingerprint confirmation were carried out by x-ray diffraction (XRD) and Raman analysis respectively. The elemental compositions and atomic species of sensor materials were studied using energy dispersive spectrometer (EDS) analysis and x-ray photoelectron spectroscopy (XPS) spectra respectively. The study of atomic planar arrangements and crystalline nature were examined by using a high-resolution transmission electron microscope (HR-TEM) micrograph and selected area electron diffraction (SAED) pattern respectively. Hollow ZnO particles sensor was revealed remarkable selectivity towards hydrogen (H2) gas. The lowest H2 detection limit of ZnO sensor was at 2 ppm with the response of 7%, whereas 89% gas response was recorded for 100 ppm at optimized temperature 225 °C with response time 139 s. Gas response as a function of operating temperatures as well as gas concentrations was tested along with good sensor stability. The transient gas response and selectivity studies were carried out and analyzed. ZnO growth and gas sensing mechanisms were elucidated. |
| Databáze: | OpenAIRE |
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