期刊
THIN SOLID FILMS
卷 636, 期 -, 页码 257-266出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2017.05.051
关键词
Gas sensing; Bismuth oxide; Nanorods; Zinc oxide; Benzene; Selectivity
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [2010-0020163, 2015R1D1A1A01057029]
- National Research Foundation of Korea [2015R1D1A1A01057029] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We report the effects of a combination of Pd-decoration and Bi2O3-ZnO core-shell formation on the response of the Bi2O3 nanorod gas sensor to benzene. Pd-decorated Bi2O3-ZnO core-shell nanorods were synthesized by a four-step process including thermal evaporation of Bi powders in an oxygen atmosphere, atomic layer deposition of ZnO, and Pd decoration, followed by high-temperature annealing. The formation of Pd-decorated Bi2O3-ZnO core-shell nanorods was confirmed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive spectrometric elemental mapping. The Pd-decorated Bi2O3-ZnO core-shell nanorod sensor showed far stronger response to benzene improved compared to those of the Bi2O3-ZnO coreshell nanorod and Pd-decorated ZnO nanorod sensors. The Pd-decorated Bi2O3-ZnO core-shell nanorod sensor exhibited a response (R-a/R-g) of 28.0 to 200 ppm of benzene at 300 degrees C, whereas those of the Bi2O3-ZnO coreshell nanorod, and Pd-decorated ZnO nanorod sensors were 9.1 and 8.3, respectively. The extraordinarily strong response of the Pd-decorated Bi2O3-ZnO core-shell nanorod sensor compared to other sensors might be attributed to the intensified potential barrier modulation at the Bi2O3-ZnO interface due to the Pd-induced enhanced generation of electrons. The Pd-decorated Bi2O3-ZnO core-shell nanorod sensor also showed very good selectivity toward benzene against other reducing gases, such as ethanol, toluene, carbon monoxide, and acetone. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据