【作者】：Chong Wang,Ruize Sun,Xin Li,Yanfang Sun*,Peng Sun,Fengmin Liu,Geyu Lu
【题目】：Hierarchical flower-like WO3 nanostructures and their gas sensing properties
【关键词】：WO3,Hierarchical nanostructure,Flower-like,NO2 sensor
【版面信息】：Sensors and Actuators B: Chemical 204 (2014) 224-230
摘要:
Flower-like WO3composed of nanosheets were successfully synthesized by calcining the acid-treated hydrothermal precursor. Field emission scanning electron microscopy and transmission electron microscopy results reveal that the flower-like WO3are assembled by a number of irregular-shaped nanosheets，which are cross-linked in the interior of the microflower. A possible formation mechanism is proposed on the basis of the results of time-dependent experiments. Moreover，the gas sensing properties of the obtained flower-like nanostructured WO3were investigated. It is found that the sensor based on the flower-like WO3nanostructure exhibits good selectivity and high response to NO2，and the detection limit is about 2 ppb.
