Micro-spherical ZnSnO3 material prepared by microwave-assisted method and its ethanol sensing properties  

作　　者：Dan Zhang Yuqin Zhang Yu Fan Na Luo Zhixuan Cheng Jiaqiang Xu 

机构地区：[1]NEST Lab,Department of Physics,Department of Chemistry,College of Science,Shanghai University,Shanghai 200444,China

出　　处：《Chinese Chemical Letters》2020年第8期2087-2090,共4页中国化学快报（英文版）

基　　金：supported by National Nature Science Foundation of China(Nos.61671284 and U1704255)。

摘　　要：Monodispersed ZnSnO3 microspheres are successfully prepared via a facile microwave-assisted method together with subsequently calcination treatment.Powder X-ray diffraction(PXRD)results indicate that the structure of the products shifted from crystalline to amorphous under high-tempe rature treatments.Field emission scanning electron microscope(FESEM)and the transmission electron microscope(TEM)observations demonstrate that the as-obtained products are composed of uniform microspheres with rough surfaces and the mean diameter is measured as-700 nm.Moreover,the morphology of ZnSnO3 microspheres can be well controlled by adjusting the ratio of Zn2+and Sn4+.The gas sensing properties of ZnSnO3 microspheres with different ratios of Zn2+/Sn4+are investigated.Our results indicate that the ZnSnO3 microspheres exhibit good selectivity and high sensitivity towards ethanol at the optimum working temperature of 230℃.When the sensor is exposed 50 ppm ethanol,the value of response is 47 and the response/recovery times are 11 s and 12 s,respectively.

关 键 词：ZnSnO3 microspheres Microwave synthesis MORPHOLOGY ETHANOL Gas sensor 

分 类 号：TQ132.41[化学工程—无机化工] TP212[自动化与计算机技术—检测技术与自动化装置]