Synthesis of nanograined ZnO nanorods functionalized with NiO nanoparticles and their enhanced hydrogen sensing properties
| Autor: | Sang-Hyun Kim, Bumhee Nam, Gyujin Jeong, Chongmu Lee |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Thermal oxidation Materials science Hydrogen Non-blocking I/O General Physics and Astronomy Nanoparticle chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Chemical engineering chemistry 0103 physical sciences Electrode Surface modification Nanorod 0210 nano-technology Selectivity |
| Zdroj: | Journal of the Korean Physical Society. 78:259-268 |
| ISSN: | 1976-8524 0374-4884 |
| DOI: | 10.1007/s40042-021-00064-8 |
| Popis: | NiO nanoparticle (NP)-functionalized nanograined ZnO nanorods (NRs) were grown by using the thermal evaporation of ZnSe powders; this was followed by the thermal oxidation of the ZnSe NRs to synthesize ZnO NRs and a solvothermal process for NiO functionalization. The diameters of the grains in the synthesized nanograined ZnO NRs are in the range of 50–150 nm. The ZnO grains were not spherical, but they were shaped like rice grains. The diameters and the lengths of the ZnO NRs were in the range of 40–50 nm and 1–6 µm, respectively. The diameters of the NiO NPs were in the range of 40–80 nm. A multiple-networked chemiresistive sensor was fabricated by pouring the IPA solution containing NiO NP-decorated nanograined ZnO NRs onto SiO2/Si substrates with a patterned electrode. A pristine nanograined ZnO NR sensor was also prepared in a similar manner. The NiO NP-functionalized nanograined ZnO NR sensor exhibited a greater and faster response to H2, as compared to its pristine nanograined ZnO counterpart; it also showed higher selectivity toward H2 against other reducing gases, as compared to the pristine nanograined ZnO counterpart. Herein, the origin of the enhanced sensing performance of the NiO NP-functionalized nanograined ZnO sensor is discussed in detail. |
| Databáze: | OpenAIRE |
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