基于多孔 InO 纳米片组装的微花的乙醇传感器。

Ethanol Sensors Based on Porous InO Nanosheet-Assembled Micro-Flowers.

机构信息

College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.

出版信息

Sensors (Basel). 2020 Jun 12;20(12):3353. doi: 10.3390/s20123353.

DOI:10.3390/s20123353

PMID:32545697

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7349890/

Abstract

By controlling the hydrothermal time, porous InO nanosheet-assembled micro-flowers were successfully synthesized by a one-step method. The crystal structure, microstructure, and internal structure of the prepared samples were represented by an x-ray structure diffractometry, scanning electron microscopy, and transmission electron microscopy, respectively. The characterization results showed that when the hydrothermal time was 8 h, the InO nano materials presented a flower-like structure assembled by InO porous nanosheets. After successfully preparing the InO gas sensor, the gas sensing was fully studied. The results show that the InO gas sensor had an excellent gas sensing response to ethanol, and the material prepared under 8 h hydrothermal conditions had the best gas sensing property. At the optimum working temperature of 270 °C, the highest response value could reach 66, with a response time of 12.4 s and recovery time of 10.4 s, respectively. In addition, the prepared InO gas sensor had a wide detection range for ethanol concentration, and still had obvious response for 500 ppb ethanol. Furthermore, the gas sensing mechanism of InO micro-flowers was also studied in detail.

摘要

通过控制水热时间，采用一步法成功合成了多孔 InO 纳米片组装的微花。通过 X 射线结构衍射仪、扫描电子显微镜和透射电子显微镜分别代表了所制备样品的晶体结构、微观结构和内部结构。表征结果表明，当水热时间为 8 h 时，InO 纳米材料呈现出由 InO 多孔纳米片组装而成的花状结构。成功制备 InO 气敏传感器后，对气敏性能进行了全面研究。结果表明，InO 气敏传感器对乙醇具有优异的气敏响应，在 8 h 水热条件下制备的材料具有最佳的气敏性能。在最佳工作温度 270°C 下，最高响应值可达 66，响应时间和恢复时间分别为 12.4 s 和 10.4 s。此外，所制备的 InO 气敏传感器对乙醇浓度具有较宽的检测范围，对 500 ppb 乙醇仍有明显响应。此外，还详细研究了 InO 微花的气敏机理。