Improved ethanol gas-sensing properties of optimum Fe–ZnO mesoporous nanoparticles
| Autor: | Tai Li, Da-Ming Zhu, Yue Shen, Linjun Wang, Feng Gu, Qinyi Li, Meng Cao |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Vapor pressure Nanoparticle Polyethylene Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Hydrothermal circulation Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Chemical engineering Specific surface area 0103 physical sciences Electrical and Electronic Engineering Mesoporous material Porosity |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:3074-3083 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-019-02852-2 |
| Popis: | Fe-doped ZnO (Fe–ZnO) mesoporous nanoparticles have been synthesized via a facile hydrothermal method, which utilizes pluronic triblock copolymer polyethylene glycol–polypropylene glycol–polyethylene glycol (PEO-PPO-PEO) as the pore-forming agent. Fe–ZnO composites have an unique porous structure. Their pore sizes increase with Fe-doping concentration and reach a maximum as Fe concentration is 15 at.%; the specific surface area of synthesized mesoporous Fe–ZnO nanoparticles reaches a maximum as the Fe concentration is about 11 at.%. Electron microscopy, vapor pressure isotherm measurements and photoluminescence (PL) were used to characterize synthesized Fe–ZnO composites. Fe–ZnO-based gas sensors exhibit excellent response in detecting ethanol; the sensing response of Fe(11 at.%)–ZnO reaches 319.8, which is significantly higher than most of the ZnO-based gaseous sensors. The improved sensitivity is ascribed to the increase of oxygen-related defects and specific surface area of Fe–ZnO composites. |
| Databáze: | OpenAIRE |
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