کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5397062 1505775 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
XPS studies of active elements surface of gas sensors based on WO3−x nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
XPS studies of active elements surface of gas sensors based on WO3−x nanoparticles
چکیده انگلیسی
Nanodisperse WO3−x oxides (x ≥ 0) were synthesized by method of electrical explosion of wires. The structure of core levels W4f and O1s was explored by XPS-method. Exposure of oxides to air at 293 K leads to the formation of WO3·(OH2)n-phase on the surface of nanoparticles. A correlation between value x of nonstoichiometric WO3−x oxide matrix and contents of OH-groups in it was revealed. It was noticed, that the increase of number of W5+-states at nanoparticles synthesis leads to rise of the sensor response to molecular hydrogen at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 156–158, May 2007, Pages 172-175
نویسندگان
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