静电纺丝
纳米纤维
甲醇
材料科学
化学工程
复合数
扫描电子显微镜
吸附
丙酮
解吸
介孔材料
纳米技术
复合材料
催化作用
化学
有机化学
聚合物
工程类
作者
Wenxian Tang,Jing Wang,Ping Yao,Xiaogan Li
标识
DOI:10.1016/j.snb.2013.11.003
摘要
SnO2-ZnO composite nanofibers were synthesized by an electrospinning method in this study. The structural composition and morphology were characterized by X-ray diffraction, scanning electron microscopy and N2 physical adsorption. The results indicated that hollow hierarchical SnO2-ZnO composite nanofibers having mesopore structure formed after sintering at 600 °C for 3 h. The gas sensor prepared by the SnO2-ZnO composite nanofibers exhibited good selectivity to methanol in the presence of ethanol, acetone, formaldehyde, ammonia, toluene and benzene at the optimum operating temperature of 350 °C. The response and recovery time to 10 ppm methanol were about 20 s and 40 s, respectively. The growth mechanism of the hollow hierarchical nanofibers was discussed, as well as the methanol adsorption–desorption mechanism.
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