کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7146256 | 1462082 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis and gas sensing properties of In2O3-WO3 heterojunction nanofibers
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A series of In2O3-WO3 heterojunction nanofibers were synthesized via the electrospinning technique in this study. The morphological and microstructural properties of these nanofibers have been characterized by XRD (X-ray diffraction), field emission scanning electron microscopy (FESEM), selected area electron diffractive (SAED), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The gas sensing properties of the In2O3-WO3 heterojunction nanofibers were evaluated. The results indicate that the sensor based on In2O3-WO3 nanofibers, in which the molar ratio of In2O3:WO3 is 1.5:100, exhibits the largest response toward 50Â ppm acetone among those nanofibers, having a response about 12.9-50Â ppm acetone, which is almost 2.5 times higher than that of sensor based on pure WO3 nanofibers at the optimum operating temperature. What's more, the sensor can detect acetone in sub-ppm concentrations with high response, the limit of detection (LOD) of the sensor based on heterojunction nanofibers is â¼0.4Â ppm, which is promising for being used in noninvasive detection of illnesses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 209, 31 March 2015, Pages 622-629
Journal: Sensors and Actuators B: Chemical - Volume 209, 31 March 2015, Pages 622-629
نویسندگان
Changhao Feng, Xin Li, Jian Ma, Yanfeng Sun, Chong Wang, Peng Sun, Jie Zheng, Geyu Lu,