کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5358397 | 1503650 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of hollow silica nanosphere with high accessible surface area and their hybridization with carbon matrix for drastic enhancement of electrochemical property
ترجمه فارسی عنوان
سنتز نانوسفر سیلیس توخالی با سطح قابل دسترس سطح بالا و هیبریداسیون آنها با ماتریس کربن برای افزایش قابل توجهی از ویژگی های الکتروشیمیایی
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Hollow silica nanospheres with high accessible surface area have been synthesized by using core-shell-corona polymeric micelle of poly (styrene-b-2-vinyle pyridine-b-ethylene oxide) (PS45k-PVP26k-PEO82k) as a template. The size of the template polymeric micelle depends on the pH of the solution, i.e. â100Â nm at pH 7 whereas â300Â nm at pH 4. The enlarged size of the micelle is possibly due to the protonation of the PVP block, which also serves as reaction sites for silica precursor. The size of the obtained silica nanosphere measured with transmission electron microscope (TEM) is around â70Â nm and shell thickness is â20Â nm. Fourier transformed infrared spectroscopy (FTIR) data confirms that the polymer template is completely removed during calcination. Conductive carbon is doped into the silica nanosphere through glucose solution followed by hydrothermal treatment and pyrolysis. It is found that the electrochemical performance and stability of the silica nanosphere is dramatically enhanced after carbon doping. The combined strategy of the core-shell-corona micelle as template and carbon doping could represent a new platform for the researchers to develop functional nanomaterials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 314, 30 September 2014, Pages 552-557
Journal: Applied Surface Science - Volume 314, 30 September 2014, Pages 552-557
نویسندگان
Mohammad Mydul Alam, Haruki Yamahana, Bishnu Prasad Bastakoti, Hom Nath Luitel, Wenwen Zhao, Yusuke Yamauchi, Takanori Watari, Hideyuki Noguchi, Kenichi Nakashima,