Synthesis and the improved sensing properties of hierarchical SnO2 hollow nanosheets with mesoporous and multilayered interiors
Synthesis and the improved sensing properties of hierarchical SnO2 hollow nanosheets with mesoporous and multilayered interiors
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具有介孔和多层内部的分层 SnO2 中空纳米片的合成和改进的传感性能
DOI：
10.1016/j.snb.2015.08.068
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Zheng Weitao
中科院分区：
文献类型：
--
作者：
Zeng Yi;Wang Yanzhe;Qiao Liang;Bing Yifei;Zou Bo;Zheng Weitao
The unique flowerlike SnO2hollow nanosheets with multilayer walls have been successfully synthesized by a simple anneal-etching strategy based on flowerlike ZnSn(OH)6solid nanosheets. FESEM and TEM observations reveal that this new type of nonspherical SnO2hollow structure is composed of hexagonal hollow nanosheets with mesoporous and multilayered interiors, where the secondary building blocks are numerous nanoparticles. Synthetic step-related investigation demonstrates that the formation of flowerlike hollow nanosheets with mesoporous and multilayer walls are ascribed to the final well-preserved shapes of flowerlike ZnSn(OH)6solid template and the critical hollowing process in the last etching treatment. The well-aligned porous and multilayer walls of SnO2hollow nanosheets retain actual high surface area and surface accessibility, and the improved gas sensing performances can be anticipated. It is found that our SnO2nanostructures have a response of 18.3–50 ppm acetone at the optimal working temperature of 300 °C, and the response time and recovery time are within 0.9 and 5.8 s, respectively.
