期刊
SCIENCE CHINA-MATERIALS
卷 63, 期 10, 页码 2028-2039出版社
SCIENCE PRESS
DOI: 10.1007/s40843-020-1364-4
关键词
gas sensor; PANI/WO3 cotton thread; p-n heterojunction; NH(3)detection
资金
- National Natural Science Foundation of China [61471233]
A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH(3)at room temperature is developed here. A layer of WO(3)with PANI nanoparticles can be deposited byin-situpolymerization. The morphology and structure of the specimens were investigated by utilizing TEM, SEM, XRD and FTIR. The sensing performance of the PANI/WO3@cotton sensors with different WO(3)molar ratios to NH(3)at room temperature was examined. The results show that the optimal sensor (10 mol% WO3) has a response of 6.0 to 100 ppm NH3, which is significantly higher than that of the sensors based on pristine PANI and other composites. The PANI/WO3@cotton sensor also displays excellent selectivity, gas response, and flexibility even at room temperature. The unique fiber structure, p-n heterojunction, and the increased protonation of PANI in the composites contribute to the enhanced sensing property.
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