کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438304 | 1398182 | 2017 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of Gd-doped SnO2 nanostructures and their enhanced gas sensing properties
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and characterization of Gd-doped SnO2 nanostructures and their enhanced gas sensing properties Synthesis and characterization of Gd-doped SnO2 nanostructures and their enhanced gas sensing properties](/preview/png/5438304.png)
چکیده انگلیسی
In the present work, we report the influence of Gd-doping on structural, optical and gas sensing properties of SnO2 nanoparticles. X-ray diffraction (XRD) and Raman spectroscopy studies confirmed formation of tetragonal rutile type structure of both undoped and Gd-doped SnO2 nanoparticles. The crystallite size has been found to decrease with increase in dopant concentration which was confirmed from XRD and TEM techniques. It has been observed that Raman surface modes are directly related to the surface area of nanoparticles. Photoluminescence (PL) spectroscopy confirmed large number of oxygen vacancies in 3% Gd-doped SnO2 nanoparticles. It has been observed that 3% doped sensor displayed exceptionally large sensor response towards ethanol which is about 27 times larger than that of undoped sensor. The optimum operating temperature of doped sensors has reduced as compared to undoped sensor. The enhanced sensor response of Gd-doped nanoparticles has been attributed to small crystallite size, large number of oxygen vacancies, high surface basicity and increased contribution of Raman surface modes. Moreover, it has been observed that 3% Gd doped SnO2 nanoparticle sensor is highly selective towards ethanol.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 2, 1 February 2017, Pages 2350-2360
Journal: Ceramics International - Volume 43, Issue 2, 1 February 2017, Pages 2350-2360
نویسندگان
Gurpreet Singh, Ravi Chand Singh,