Facile synthesis of perfect ZnSn(OH) 6 octahedral microcrystallines with controlled size and high sensing performance towards ethanol

• Published in: Frontiers of materials science Vol. 12; no. 2; pp. 176 - 183
• Main Authors: SHU, Shaoming, WANG, Chao, LIU, Shantang
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01.06.2018; Springer Nature B.V
• Subjects: Chemical synthesis; Chemistry and Materials Science; Detection; Ethanol; gas sensor; Gas sensors; Materials Science; octahedron; Octahedrons; Operating temperature; Recovery time; Research Article; Sensors; ZnSn(OH) 6; gas sensor; octahedron; ZnSn(OH); ethanol
• ISSN: 2095-025X; 2095-0268
• DOI: 10.1007/s11706-018-0423-2

Uniform and monodisperse ZnSn(OH) 6 perfect octahedrons have been synthesized by a facile coprecipitation reaction process. The particle size of the as-prepared ZnSn(OH) 6 octahedral structure can be readily controlled by adjusting the reaction temperature ( T), the side length of ZnSn(OH) 6 octahedrons tailored from 3 µm (40°C) to 4 µm (60°C) and 5 µm (80°C). The ethanol sensing properties of the ZnSn(OH) 6 octahedrons were carefully investigated. The gas sensing experimental data show that the sensor based on ZnSn(OH) 6 (40°C) show good selectivity, fast response/recovery time and the highest response ( R a/ R g = 23.8) to 200 ppm ethanol at relatively low optimum operating temperature (200°C) among sensors based on ZnSn(OH) 6 (60°C) and ZnSn(OH) 6 (80°C), which might result from different specific surface areas. The study demonstrated that perfect octahedral ZnSn(OH) 6 with controlled crystalline size and desirable sensing performance can be synthesized with a simple fabrication procedure, and the octahedral ZnSn(OH) 6 could be a highly promising material for high-performance sensors.