کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438883 | 1398188 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of electrospun Cu-doped α-Fe2O3 semiconductor nanofibers for NO2 gas sensor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation of electrospun Cu-doped α-Fe2O3 semiconductor nanofibers for NO2 gas sensor Preparation of electrospun Cu-doped α-Fe2O3 semiconductor nanofibers for NO2 gas sensor](/preview/png/5438883.png)
چکیده انگلیسی
Cu-doped α-Fe2O3 semiconducting nanofibers were prepared by electrospinning over a wide range of Cu molar ratios (fCu = 0-0.52 for fCu + fFe = 1) followed then by pyrolysis in air atmosphere to remove the organic template. Cu favored to substitute some of the Fe cations in the hematite structure to form crystalline cuprospinel (CuFe2O4) phase. The nanofibers exhibited an interesting p- to n-type transition of semiconducting behavior when fCu was increased above 0.23, as observed from electrical resistance change against oxidative NO2 gas of ppm levels (5-50 ppm) at 300 °C. The sensing response decreased from ⼠2.59 to ⼠1.52 when the CuFe2O4 concentration increases; nonetheless, the presence of CuFe2O4 facilitated adsorption of the NO2 gas, resulted in a shortened response time (up to 40%) as fCu was increased to 0.52.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Supplement 1, August 2017, Pages S535-S540
Journal: Ceramics International - Volume 43, Supplement 1, August 2017, Pages S535-S540
نویسندگان
Ren-An Wu, Chun Wei Lin, Wenjea J. Tseng,