Unique polyhedron CeO2 nanostructures for superior formaldehyde gas-sensing performances
| Autor: | Muhammad Sufyan Javed, Guanjun Qiao, Ziwei Xu, Shahid Hussain, Nimra Aslam, Mingsong Wang, Xiaoyong Yang, Guiwu Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Nanostructure
Materials science Polyvinylpyrrolidone Process Chemistry and Technology Formaldehyde 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Polyhedron chemistry.chemical_compound Ammonium bicarbonate chemistry X-ray photoelectron spectroscopy Chemical engineering Specific surface area Materials Chemistry Ceramics and Composites medicine 0210 nano-technology medicine.drug |
| Zdroj: | Ceramics International. 44:19624-19630 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.07.212 |
| Popis: | Highly exposed surface area CeO2 polyhedral nanostructures were successfully prepared via a two-step hydrothermal route for gas-sensing applications. The surface chemistry and formation of polyhedral nanostructures was attributed to the interaction between polyvinylpyrrolidone and ammonium bicarbonate surfactants with parent ceria. The synthesized polyhedron CeO2 structures were characterized using XRD, XPS, BET, SEM, EDS and TEM, respectively. The polyhedrons exhibited a high specific surface area 98.76 m2/g. For gas-sensing applications, the CeO2 polyhedrons were exposed to different gases at various temperatures, from a low to high concentration range (1–150 ppm). At an optimal temperature 220 °C, superior gas-sensing response towards formaldehyde was observed than other target gases. The enhanced sensor response was attributed to multifaceted polyhedral nanostructures. The polyhedral structure based sensors have great potential in industrial sensing applications. |
| Databáze: | OpenAIRE |
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