TY - JOUR
T1 - Syntheses of high-quality mesoporous materials directed by blends of nonionic amphiphiles under nonaqueous conditions
AU - Tian, Bozhi
AU - Liu, Xiaoying
AU - Zhang, Zhendong
AU - Tu, Bo
AU - Zhao, Dongyuan
PY - 2002/1/1
Y1 - 2002/1/1
N2 - A rapid solvent evaporation approach combined with the blends of nonionic amphiphiles as the structure-directing agents (SDA) has been demonstrated to direct the formation of high-quality mesoporous silica materials with two-dimensional (2D) hexagonal or 3D cubic mesostructures. By using oligometric alkyl-ethylene oxide surfactant Brij 35 (C12H25EO23) as a co-template, high-quality hexagonal (p6m) mesoporous silica can be prepared by using triblock poly(ethylene oxide)b-poly(propylene oxide)-b-poly(ethylene oxide) co-polymer Pluronic P123, EO20PO70EO20, as a template in ethanol media. A highly ordered cubic (space group Im3̄m) mesoporous silica is obtained by using poly(ethylene oxide)-b-poly(butylene oxide)-b-poly(ethylene oxide) co-polymer polyglycol B50-6600, EO39BO47EO39, as a template and Brij 35 as a co-template. The SDA composed of triblock co-polymer and a small amount of nonionic surfactant can increase the efficiency of assembly of organic and inorganic hybrid species and result in the quality improvement of the silica mesostructure. Interestingly, by using B50-6600 mixed with a large amount of Brij 35 as the SDA, a limited mesophase transition from cubic (space group Im3̄m) to 2D hexagonal (p6m) is first observed. Generally, the amphiphile blend approach can increase the total pore volumes, BET surface areas of the mesoporous materials, and reduce their microporosities.
AB - A rapid solvent evaporation approach combined with the blends of nonionic amphiphiles as the structure-directing agents (SDA) has been demonstrated to direct the formation of high-quality mesoporous silica materials with two-dimensional (2D) hexagonal or 3D cubic mesostructures. By using oligometric alkyl-ethylene oxide surfactant Brij 35 (C12H25EO23) as a co-template, high-quality hexagonal (p6m) mesoporous silica can be prepared by using triblock poly(ethylene oxide)b-poly(propylene oxide)-b-poly(ethylene oxide) co-polymer Pluronic P123, EO20PO70EO20, as a template in ethanol media. A highly ordered cubic (space group Im3̄m) mesoporous silica is obtained by using poly(ethylene oxide)-b-poly(butylene oxide)-b-poly(ethylene oxide) co-polymer polyglycol B50-6600, EO39BO47EO39, as a template and Brij 35 as a co-template. The SDA composed of triblock co-polymer and a small amount of nonionic surfactant can increase the efficiency of assembly of organic and inorganic hybrid species and result in the quality improvement of the silica mesostructure. Interestingly, by using B50-6600 mixed with a large amount of Brij 35 as the SDA, a limited mesophase transition from cubic (space group Im3̄m) to 2D hexagonal (p6m) is first observed. Generally, the amphiphile blend approach can increase the total pore volumes, BET surface areas of the mesoporous materials, and reduce their microporosities.
KW - Mesoporous materials
KW - Nonaqueous condition
KW - Surfactant
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=0036736606&partnerID=8YFLogxK
U2 - 10.1016/S0022-4596(02)99536-8
DO - 10.1016/S0022-4596(02)99536-8
M3 - Article
AN - SCOPUS:0036736606
SN - 0022-4596
VL - 167
SP - 324
EP - 329
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 2
ER -