کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1330241 | 1500122 | 2012 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation of molybdenum carbides with multiple morphologies using surfactants as carbon sources Preparation of molybdenum carbides with multiple morphologies using surfactants as carbon sources](/preview/png/1330241.png)
Molybdenum carbides with surfactants as carbon sources were prepared using the carbothermal reduction of the appropriate precursors (molybdenum oxides deposited on surfactant micelles) at 1023 K under hydrogen gas. The carburized products were characterized using scanning electron microscopy (SEM), X-ray diffraction and BET surface area measurements. From the SEM images, hollow microspherical and rod-like molybdenum carbides were observed. X-ray diffraction patterns showed that the annealing time of carburization had a large effect on the conversion of molybdenum oxides to molybdenum carbides. And BET surface area measurements indicated that the difference of carbon sources brought a big difference in specific surface areas of molybdenum carbides.
Molybdenum carbides having hollow microspherical and hollow rod-like morphologies that are different from the conventional monodipersed platelet-like morphologies.Figure optionsDownload as PowerPoint slideHighlights
► Molybdenum carbides were prepared using surfactants as carbon sources.
► The kinds of surfactants affected the morphologies of molybdenum carbides.
► The time of heat preservation at 1023 K affected the carburization process.
► Molybdenum carbides with hollow structures had larger specific surface areas.
Journal: Journal of Solid State Chemistry - Volume 194, October 2012, Pages 19–22