Synthesis and bio-adsorptive properties of large-pore periodic mesoporous organosilica rods

被引：96
作者：
Qiao, SZ
Yu, CZ
Xing, W
Hu, QH
Djojoputro, H
Lu, GQ [1 ]
机构：
[1] Univ Queensland, Sch Engn, ARC, Ctr Funct Nanomat, Brisbane, Qld 4072, Australia
[2] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China
[3] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China
[4] Univ Petr, CNPC, State Key Lab Heavy Oil Proc, Dongying 257061, Peoples R China
来源：
CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 24期
关键词：
D O I：
10.1021/cm051735b
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Highly ordered large-pore periodic mesoporous organosilica (PMO) with a rodlike morphology was successfully synthesized at low acid concentrations and in the presence of inorganic salt using triblock copolymer P123 as a template. The inorganic salt can not only promote the formation of highly ordered mesoporous structure but also control the morphology of PMO materials. The adsorption of bovine heart cytochrome c (cyt c) on PMO was studied at different ionic strengths and pHs by comparing with the adsorption on pure silica materials with similar morphology and pore structure. The results show that the adsorbed amount reaches the maximum around the isoelectric point of cyt c and the PMO materials do not have higher adsorbed capacity than SBA-15 silica. The specific adsorption amounts of cyt c on PMO or pure silica decrease as ionic strengths increase at all pH conditions. Our results directly support the conclusion that the electrostatic interaction between cyt c and PMO/pure silica surface is more dominant than hydrophobic forces in the bioadsorption of cyt c.
引用
收藏
页码：6172 / 6176
页数：5
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