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Systematically Controlled Pore System of Ordered Mesoporous Carbons Using Phosphoric Acid as the In situ Generated Catalysts for Carbonization and Activation
Author(s) -
Jin Xing,
Lee Chang Hyun,
Kim Jin Hoe,
You Dae Jong,
Pak Chanho,
Shon Jeong Kuk,
Kim Ji Man
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10399
Subject(s) - phosphoric acid , carbonization , mesoporous material , microporous material , materials science , catalysis , chemical engineering , carbon fibers , mesoporous organosilica , mesoporous silica , nanotechnology , organic chemistry , chemistry , composite material , scanning electron microscope , composite number , engineering , metallurgy
We report on a facile synthesis of the ordered mesoporous carbon (OMC) materials with systematically controlled microporosity and mesoporosity simultaneously through the nano‐replication route using phosphoric acid as the acid catalyst and activation agent. The use of phosphoric acid affects the pore structures of OMC materials, such as the formation of numerous micropores by activation of the carbon framework and the enlargement of mesopores by spontaneous phase separation during the carbonization. The mesopore sizes, surface areas, total pore volumes, and micropore volumes of the OMC materials are highly dependent on the phosphoric acid content and can be systematically controlled in the range 3.7–7.5 nm, 1027–2782 m 2 g –1 , 1.12–3.53 cm 3 g –1 and 0.34–0.95 cm 3 g –1 , respectively. OMC materials with systematically controlled pore structures were successfully synthesized using phosphoric acid as the carbonization catalyst and mesoporous silica materials with cubic Ia 3 d and 2‐D hexagonal mesostructures as the templates. The phosphoric acid in the synthesis of ordered mesoporous carbon materials acts as the chemical activating agent for micropore generation of the carbon framework and pore‐expanding agent for controlling of mesopore size, in addition to functioning as the acid catalyst. The present synthesis pathway is very useful for preparing OMC materials with tunable mesopore sizes and well‐developed microporosities at the same time.