TY - JOUR
T1 - Highly ordered mesoporous silica structures templated by poly(butylene oxide) segment di- and tri-block copolymers
AU - Yu, Chengzhong
AU - Yu, Yonghao
AU - Miao, Lei
AU - Zhao, Dongyuan
N1 - Funding Information:
This work was supported by the National Science Foundations of China (Grant no. 29925309 and 29873012) and National Education Ministry. We thank Dr. Weiming Hua, Yinghong Le and Ms. Haiying Chen for BET and TGA measurements. We also thank Dow company for providing block copolymers.
PY - 2001/6
Y1 - 2001/6
N2 - Highly ordered mesoporous silica structures including body-centered cubic (Im 3̄ m), two-dimensional hexagonal (p6mm) and lamellar (Lα) symmetries have been synthesized by using hydrophobic poly(butylene oxide) moiety diblock and triblock copolymers as structure-directing agents. Under acidic condition, highly ordered, caged cubic mesoporous silica structures (FDU-1, Im 3̄ m) with a large cell parameter (a = 220 Ä) can be formed in the presence of triblock poly(ethylene oxide)-poly(butylene oxide)-poly(ethylene oxide) (PEO-PBO-PEO) copolymer such as EO39BO47EO39. Calcined FDU-1 has a largest pore size of 120 Å among all known cubic silica mesostructures, a pore volume of 0.77 cm3/g, and a BET surface area of 740 m2/g. Diblock poly(butylene oxide)-poly (ethylene oxide) (PBO-PEO) copolymer such as BO10 EO16 favors to yield highly ordered two-dimensional hexagonal (p6mm) silica mesostructures with a well-uniformed pore size of 60 Å and a large BET surface area of 902 m2/g. Lamellar (Lα) mesostructures can also be obtained when high concentration diblock copolymer is used as the structure-directing agent. The calcined cubic mesostructured silica FDU-I is hydrothermally stable in boiling water for at least nine days.
AB - Highly ordered mesoporous silica structures including body-centered cubic (Im 3̄ m), two-dimensional hexagonal (p6mm) and lamellar (Lα) symmetries have been synthesized by using hydrophobic poly(butylene oxide) moiety diblock and triblock copolymers as structure-directing agents. Under acidic condition, highly ordered, caged cubic mesoporous silica structures (FDU-1, Im 3̄ m) with a large cell parameter (a = 220 Ä) can be formed in the presence of triblock poly(ethylene oxide)-poly(butylene oxide)-poly(ethylene oxide) (PEO-PBO-PEO) copolymer such as EO39BO47EO39. Calcined FDU-1 has a largest pore size of 120 Å among all known cubic silica mesostructures, a pore volume of 0.77 cm3/g, and a BET surface area of 740 m2/g. Diblock poly(butylene oxide)-poly (ethylene oxide) (PBO-PEO) copolymer such as BO10 EO16 favors to yield highly ordered two-dimensional hexagonal (p6mm) silica mesostructures with a well-uniformed pore size of 60 Å and a large BET surface area of 902 m2/g. Lamellar (Lα) mesostructures can also be obtained when high concentration diblock copolymer is used as the structure-directing agent. The calcined cubic mesostructured silica FDU-I is hydrothermally stable in boiling water for at least nine days.
KW - Block copolymer
KW - Mesoporous materials
KW - Synthesis
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U2 - 10.1016/S1387-1811(01)00169-X
DO - 10.1016/S1387-1811(01)00169-X
M3 - Article
AN - SCOPUS:0035364809
SN - 1387-1811
VL - 44-45
SP - 65
EP - 72
JO - Zeolites
JF - Zeolites
ER -