کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517272 | 1511586 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and hydrogen storage of activated rayon-based carbon fibers with high specific surface area
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Activated carbon fibers were prepared from rayon-based carbon fibers by two step activations with steam and KOH treatments. Hydrogen storage properties of the activated rayon-based carbon fibers with high specific surface area and micropore volume have been investigated. SEM, XRD and Brunauer-Emmett-Teller (BET) were used to characterize the samples. The adsorption performance and porous structure were investigated by nitrogen adsorption isotherm at 77Â K on the base of BET and density functional theory (DFT). The BET specific surface area and micropore volume of the activated rayon-based carbon fibers were 3144Â m2/g and 0.744Â m3/g, respectively. Hydrogen storage properties of the samples were measured at 77 and 298Â K with pressure-composition isotherm (PCT) measuring system based on the volumetric method. The capacities of hydrogen storage of the activated rayon-based carbon fibers were 7.01 and 1.46Â wt% at 77 and 298Â K at 4Â MPa, respectively. Possible mechanisms for hydrogen storage in the activated rayon-based carbon fibers are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 71, Issue 4, April 2010, Pages 444-447
Journal: Journal of Physics and Chemistry of Solids - Volume 71, Issue 4, April 2010, Pages 444-447
نویسندگان
Fen Gao, Dong-Lin Zhao, Yan Li, Xing-Guo Li,