Microwave preparation and remarkable ethanol sensing properties of ZnO particles with controlled morphologies in water-ethylene glycol binary solvent system

作者：Wang, Tao; Xu, Shusheng; Hu, Nantao; Hu, Jun; Huang, Da; Jiang, Wenkai; Wang, Shuai; Wu, Shimin; Zhang, Yafei; Yang, Zhi^*

来源：Sensors and Actuators B: Chemical , 2018, 255: 1006-1014.

DOI：10.1016/j.snb.2017.08.099

• Binary solvent systems
• Controlled morphology
• Gas sensing properties
• Limit of detection
• Microwave assisted synthesis
• Microwave preparation
• Response and recovery time
• Sensing property

ZnO particles were prepared via a fast (15 min) and one step microwave-assisted synthesis method in a water-ethylene glycol binary solvent system. By increasing the proportion of ethylene glycol, morphologies of ZnO particles have an evolution from double-end clean-cut hexagonal prism to porous loose rough sphere. Furthermore, indirectly heated gas sensors were fabricated based on these materials to study their gas sensing properties to ethanol. The peanut-sharped ZnO showed the best ethanol sensing performance with low limit of detection (less than 1 ppm), very high response (about 250 at 300 °C), short response and recovery time (10 and 17 s, respectively), excellent selectivity and good stability. Our work has paved a simple, fast and environmentally friendly way to fabricate ethanol sensors with excellent sensing properties, which have great potentials to be widely used in the future.

• 出版日期2018
• 单位上海交通大学