نتایج جستجو برای: carbonization
تعداد نتایج: 2338 فیلتر نتایج به سال:
A facile approach to fabricate novel highly microporous carbons has been developed by direct carbonization of lowly cross-linked polystyrene. The as-prepared highly microporous carbons demonstrate unusually high micropore rate (97%), high surface area (1108 m(2) g(-1)) and uniform pore size distribution, and thus exhibit excellent size-selective adsorption and electrochemical properties.
We have successfully developed a new one-pot solution-phase route, namely microwave-assisted hydrothermal reduction/carbonization (MAHRC), for a rapid synthesis of coaxial Ag/C nanocables. The nanocables can self-assemble in situ in an end-to-end fashion into interconnected chains.
Highly porous N-doped activated carbon monoliths (ACMs) are fabricated by carbonization and physical activation of mesoporous polyacrylonitrile (PAN) monoliths in the presence of CO(2). The monoliths exhibit exceptionally high CO(2) uptake; 5.14 mmol g(-1) at ambient pressure and temperature and 11.51 mmol g(-1) at ambient pressure and 273 K.
Nitrogen-enriched porous carbon materials made via the carbonization of polyacrylonitrile containing block copolymer act as efficient and highly selective CO(2) sorbents. Nitrogen content and surface area, which are both influenced by pyrolysis temperature and atmosphere, are crucial for CO(2) adsorption performance.
A unique carbon with a high specific surface area was prepared by carbonization of a polymer-based precursor, agar, in the presence of graphene. Graphene prevents the shrinkage and aggregation of the carbonized particles, resulting in extraordinarily large external surface area (∼1200 m(2) g(-1)) of the carbon, which shows a high rate performance as a supercapacitor electrode.
Graphene quantum dots (GQDs) have attracted increasing interest because of their excellent properties such as strong photoluminescence, excellent biocompatibility and low cost. Herein, we develop a general method for the synthesis of doped and undoped GQDs, which relies on direct carbonization of organic precursors in the solid state.
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