التفاصيل البيبلوغرافية
| العنوان: |
Facile fabrication of chromium oxide micro/nanospheres and enhanced ethanol gas sensing performances. |
| المؤلفون: |
Wang, Shuangming1,2 wangshuangming@mail.tjnu.edu.cn, Cao, Jing3 caojing@tjpu.edu.cn, Li, Xifei1,2, Li, Dejun1,2 |
| المصدر: |
Materials Letters. Feb2017, Vol. 188, p228-231. 4p. |
| مصطلحات موضوعية: |
*PERFORMANCE of gas detectors, *MICROFABRICATION, *CHROMIUM oxide, *ETHANOL, *SURFACE active agents, *CHEMICAL templates |
| مستخلص: |
Chromium oxide (Cr 2 O 3 ) micro/nanospheres are skillfully designed and successfully synthesized by a facile route without any templates or surfactants. Morphology and structure characterizations reveal that Cr 2 O 3 micro/nanospheres are assembled by irregular nanoparticles as primary building blocks and present loose hierarchical architecture. The Cr 2 O 3 micro/nanospheres sensors exhibit rapid response and recovery kinetics (5 s and 6 s), good selectivity and remarkable repeatability to ethanol gas at 220 °C, and the sensitivity to 100 ppm ethanol is about 4 times higher than that of the collapsed Cr 2 O 3 micro/nanospheres based sensors. The enhanced gas sensing performances are predominantly attributed to the synergistic effect of the unique sphere-like architecture and highly loose structure, thus providing beneficial conditions to greatly improve gas diffusion, adsorption and surface reaction. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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