کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5363293 | 1388299 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Morphological effect of MoS2 nanoparticles on catalytic oxidation and vacuum lubrication
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The closed layered MoS2 nano-balls and the opened layered MoS2 nano-slices were prepared by decomposing MoS3 in hydrogen atmosphere. The obtained MoS2 nanoparticles were respectively used as catalysts for S2â oxidation into SO42â and lubricating fillers in polyoxymethylene (POM) plastic. Only basal surface could be found in the closed layered MoS2 nano-balls, which represented very low catalytic efficiency for S2â oxidation into SO42â. However, the opened layered MoS2 nano-slices were of both basal surface and rim-edge surface and showed excellent catalytic properties. Moreover, it was shown that MoS2 nano-balls could improve the self-lubrication of POM plastic in vacuum. However, MoS2 nano-slices led to the obvious degradation of POM, implying it is not a proper additive for POM. The high activity of MoS2 nano-slices for catalyzing S2âoxidation and degrading POM was ascribed to their small sizes and partly wedge-like shapes, which led to a considerable increase in the rim sites. The weak catalysis and excellent lubrication of MoS2 nano-balls were resulted from its closed structure and chemical inertness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 8, 1 February 2010, Pages 2517-2523
Journal: Applied Surface Science - Volume 256, Issue 8, 1 February 2010, Pages 2517-2523
نویسندگان
Kun Hong Hu, Xian Guo Hu, Xiao Jun Sun,