Facile Synthesis and Acetone Sensing Performance of Hierarchical SnO2 Hollow Microspheres with Controllable Size and Shell Thickness

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• 作者：Jiao Li ; Pinggui Tang ; Jiajun Zhang ; Yongjun Feng ; Ruixian Luo ; Aifan Chen ; Dianqing Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：March 30, 2016
• 年：2016
• 卷：55
• 期：12
• 页码：3588-3595
• 全文大小：531K
• ISSN：1520-5045

文摘

A facile method to prepare SnO₂ hollow microspheres has been developed by using SiO₂ microspheres as template and Na₂SnO₃ as tin resource. The obtained SnO₂ hollow microspheres were characterized by X-ray diffraction, scanning electron microscopy, high resolution and transmission electron microscopy, and Brunauer–Emmett–Teller analysis, and their sensing performance was also investigated. It was found that the diameter of SnO₂ hollow microspheres can be easily controlled in the range of 200–700 nm, and the shell thickness can be tuned from 7.65 to 30.33 nm. The sensing tests showed that SnO₂ hollow microspheres not only have high sensing response and excellent selectivity to acetone, but also exhibit low operating temperature and rapid response and recovery due to the small crystal size and thin shell structure of the hollow microspheres, which facilitate the adsorption, diffusion, and reaction of gases on the surface of SnO₂ nanoparticles. Therefore, the SnO₂ hollow microsphere is a promising material for the preparation of high-performance gas sensors.