Curling-like Bi2WO6 microdiscs with lamellar structure for enhanced gas-sensing properties

作者: Zheng Lou ,Jianan Deng ,Lili Wang ,Lijie Wang ,Tong Zhang
期刊: Sens. Actuators B
卷号: 2013,182,217-222
接收日期: 2013-02-21 16:14:07
摘要 Abstract


Self-assembled curling-like Bi2WO6 microdiscs, consisting of closely packed nanosheets with thickness of 50 nm, have been successfully synthesized by a simple solvothermal route. This structure was characterized by field emission scanning electron microscopic (FESEM) and transmission electron microscopy (TEM). The results show that the Bi2WO6 samples are mostly microdiscs in shape and have an average side thickness of 500 nm. The time-dependent morphology of the Bi2WO6 samples has been investigated, and gas sensors based on these products were fabricated for ethanol detection. The sensor based on the curling-like Bi2WO6 nanostructures shows much better sensing properties than other Bi2WO6structures. The response of the curling-like Bi2WO6 sensor to 100 ppm ethanol is about 11.9 with the response time of 1 s. The dramatic improvement in sensing properties of the present curling-like Bi2WO6sensor may be attributed to the unique structures, the good crystallization and large surface area.


  • Bi2WO6;  

  • Curling-like;  

  • Lamellar structures;  

  • Ethanol sensing