期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 283, 期 -, 页码 693-704出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.12.016
关键词
SnO2; Ultrathin nanorod; Nonspherical hollow structures; n-butanol; Gas sensor
资金
- Natural Science Foundation of China [51402122, 51472106, 61376122]
- Science and Technology Development Project, Jilin Province [20170101168JC]
- Independent Project of State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS)
A new type of nonspherical hollow nanocubes functionalized with well-aligned rodlike building blocks have been successfully prepared via a facile one-pot hydrothermal approach in case of SnO2. The structural and morphological characterization reveals that the dense rodlike SnO2 subunits are vertically distributed on all of the six equivalent facets of cubic structure. The rodlike primary building blocks with a uniform diameter of about 5 nm exhibit a single-crystalline rutile structure. A two-step sequential growth model is proposed based on observation from a time-dependent evolution process, revealing that the initially formed of well-defined ZnSn (OH)(6) solid cubes can serve as sacrifice self-template for the interior hollowing and vertical growth of SnO2 nanorods. Moreover, gas sensor based on SnO2 nanocages exhibits the enhanced sensing performances to n-butanol. The significant decrease in response-recovery time can be attributed not only to the interior cavities combined with permeable shells for fast transfer of gas molecules, but also to these high-activated rodlike subunits with ultrathin diameter.
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