کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
74569 49095 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sugarcane bagasse as the scaffold for mass production of hierarchically porous carbon monoliths by surface self-assembly
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Sugarcane bagasse as the scaffold for mass production of hierarchically porous carbon monoliths by surface self-assembly
چکیده انگلیسی

The hierarchically porous carbon materials (HPCMs) with micro- and meso-porosity were prepared by surface coating and solvent evaporation-induced self assembly (EISA) using sugarcane bagasse as the scaffold. The triblock copolymer F127 and phenol–formaldehyde resin were used as mesostructural directing agent and carbon precursor, respectively. The microstructures in terms of morphology, pore texture, degree of graphitization, and thermal stability were characterized by scanning and transmission electron microscopy, nitrogen adsorption analysis, X-ray powder diffraction, and thermogravimetric analysis, respectively. The bulk morphology of HPCMs with hierarchically porous architecture can be retained after calcination at 1000 °C. Small and wide angel XRD patterns show 2-D hexagonal mesostructures and enhanced degree of graphitization. The specific surface areas of monolithic carbon materials are in the range 487–544 m2 g−1 with the micropore percentages of 66–67%. The thermal stability of HPCMs is enhanced by the strong interaction of hydroxyl groups of sugarcane bagasse with phenol–formaldehyde resins, and subsequently retains the highly ordered structures with pore size distributions centered at 0.5 and 3.2 nm. In addition, the bagasse-based HPCMs show good electrochemical property and the specific capacitances are in the range 190–234 F g−1 at the scan rate of 5–50 mV s−1. Results clearly show that the use of surface coating and EISA with sugarcane bagasse as the scaffold is an easy, effective and mass productive strategy for fabrication of HPCMs.

Figure optionsDownload as PowerPoint slideHighlights
► The monolithic hierarchically porous carbon materials (HPCMs) have micro-, meso- and macro-porosities.
► Mass productive approach has been developed for synthesis of HPCMs.
► Natural templates, sugarcane bagasse, were used as scaffold.
► 2-D hexagonal mesostructures and enhanced degree of graphitization was obtained.
► Thermal stability is enhanced by the strong interaction of hydroxyl groups of sugarcane bagasse with phenol–formaldehyde resins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 147, Issue 1, January 2012, Pages 47–52
نویسندگان
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