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J Colloid Interface Sci

Title:		Synthesis of large-pore phenyl-bridged mesoporous organosilica with thick walls by evaporation-induced self-assembly for efficient benzene adsorption
Author(s):		Hao N; Yang Y; Wang H; Webley PA; Zhao D;
Address:		"Department of Chemical Engineering, Monash University, Clayton, Melbourne, Victoria 3800, Australia"
Journal Title:		J Colloid Interface Sci
Year:		2010
Volume:		20100315
Issue:		2
Page Number:		429 - 435
DOI:		10.1016/j.jcis.2010.01.074
ISSN/ISBN:		1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:		"Large-pore phenyl-bridged periodic mesoporous organosilicas (PMOs) were facilely synthesized by evaporation-induced self-assembly of 1,4-bis(triethoxysily)benzene and triblock copolymer Pluronic F127 as a template under acid conditions combined with a mixed-solvothermal treatment. The ordered PMOs exhibit large uniform mesopores of approximately 9.9 nm in diameter after calcination at 350 degrees C in a nitrogen atmosphere. The mesoporous phenyl-bridged organosilica products have an ordered hexagonal mesostructure with space group p6mm. N(2) adsorption/desorption isotherms reveal imperfect mesopore channels with high surface areas (up to 1150 m(2)/g) and thick pore walls (up to 7.7 nm). The mesopores can be expanded with the decrease of acidity, as well as the increase of Pluronic F127 content. A mixed-solvothermal treatment in N,N-dimethylformamide (DMF) and water at 100 degrees C was first used to improve the periodicity of the mesopore walls, as well as increase the wall thickness. The composites exhibit efficient adsorption capacities (2.06 mmol g(-1)) for benzene, suggesting a potential adsorbent for removal of volatile organic compounds. The EISA approach combined with the mixed-solvothermal treatment provides important insights into the development of large-pore PMOs by using long-chain organosilanes, and further demonstrates the ability to fabricate materials with thick walls"
Keywords:
Notes:		"PubMed-not-MEDLINEHao, Na Yang, Yunxia Wang, Huanting Webley, Paul A Zhao, Dongyuan eng 2010/04/13 J Colloid Interface Sci. 2010 Jun 15; 346(2):429-35. doi: 10.1016/j.jcis.2010.01.074. Epub 2010 Mar 15"