UV-enhanced NO2 gas sensor based on electrospinning SnO2-ZnO composite nanofifoers

摘要

In this work, a sensor based on electrospinning SnO2-ZnO composite nanofibers with different parameters were prepared. For detecting of NO2 at room-temperature, the ultraviolet light was used to enhance the gas sensing properties. The influence of Sn salt on the resistance, grain size and response to NO2 was investigated. The results showed that the grain size was inhibited, the resistance was increased and the response to NO2 was enhanced with the addition of Sn salt. The fibers with Sn salt mass ratio of 10% exhibited greatest sensitivity to NO2 and good stability in cycle test. At last, a mechanism about UV-enhanced gas sensing properties of SnO2-ZnO nanofibers was discussed.