Enhanced Acetone Sensing Properties of SnO2-ZnO Hollow Composite Microfibers
SnO2-ZnO hollow composite microfibers were synthesized through a simple and low-cost technique of electrospinning combined with subsequent calcinations.The properties of as-formed microfibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) , X-ray diffraction (XRD) and energy dispersive spectrometer (EDS).The average diameter of SnO2-ZnO microfibers is about 250 nm.The hollow structure was also formed after sintering at 500℃ for 3 h.Compared with the SnO2 and ZnO microfibers, SnO2-ZnO microfiber-based gas sensor exhibited more excellent gas sensing properties toward acetone.The results showed that the response (Ra/Rg) of SnO2-ZnO microfibers to 50 ppm acetone was 20, which was about 2 (4) times higher than that of pure SnO2 (ZnO) microfibers, the response and recovery time were 20s and 32s, respectively.Meanwhile, the combination of SnO2 and ZnO can be beneficial to the improvement of selectivity to acetone compared with SnO2 and ZnO microfibers.This can be attributed to its hollow structure and the heterojunction formation between the interface of SnO2 and ZnO grains, which shows a bright future for the application as an acetone gas sensor.
SnO2-ZnO Hollow composite microfibers Acetone gas sensor Sensing properties
Huang Feng Zhang Guozhu Liu Shantang
Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China
国内会议
成都
英文
157-162
2016-10-14（万方平台首次上网日期，不代表论文的发表时间）