Zhao Yan-Fei, Sun Yu-Ping, Yin Xiu, Yin Guang-Chao, Wang Xiao-Mei, Jia Fu-Chao, Liu Bo
Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, 255000, China.
School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000, China.
Nanoscale Res Lett. 2018 Aug 22;13(1):250. doi: 10.1186/s11671-018-2656-5.
Hierarchical SnO blooming nanoflowers were successfully fabricated via a simple yet facile hydrothermal method with the help of different surfactants. Here we focus on exploring the promotion effects of surfactants on the self-assembly of 2D SnO nanosheets into 3D SnO flower-like structures as well as their gas-sensing performances. The polyporous flower-like SnO sensor exhibits excellent gas-sensing performances to ethanol and HS gas due to high porosity when polyvinyl pyrrolidone is added into the precursor solution as a surfactant. The response/recovery times were about 5 s/8 s for 100 ppm ethanol and 4 s/20 s for 100 ppm HS, respectively. Especially, the maximum response value of HS is estimated to be 368 at 180 °C, which is one or two orders of magnitude higher than that of other test gases in this study. That indicates that the sensor fabricated with the help of polyvinyl pyrrolidone has good selectivity to HS.
通过一种简单易行的水热法，借助不同的表面活性剂成功制备了分级结构的SnO盛开状纳米花。在此，我们着重探究表面活性剂对二维SnO纳米片自组装成三维花状SnO结构的促进作用及其气敏性能。当将聚乙烯吡咯烷酮作为表面活性剂添加到前驱体溶液中时，多孔花状SnO传感器由于具有高孔隙率，对乙醇和H₂S气体表现出优异的气敏性能。对于100 ppm乙醇，响应/恢复时间分别约为5 s/8 s；对于100 ppm H₂S，响应/恢复时间分别约为4 s/20 s。特别地，H₂S在180 °C时的最大响应值估计为368，比本研究中的其他测试气体高一个或两个数量级。这表明借助聚乙烯吡咯烷酮制备的传感器对H₂S具有良好的选择性。
