Key role of sodium silicate modulus in synthesis of mesoporous silica SBA-15 rods with controllable lengths and diameters

被引：17
|
作者：
Ding, Yi [1 ]
Yin, Guangfu [1 ]
Liao, Xiaoming [1 ]
Huang, Zhongbin [1 ]
Chen, Xianchun [1 ]
Yao, Yadong [1 ]
机构：
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
来源：
MATERIALS LETTERS | 2012年 / 75卷
关键词：
Mesoporous materials; SBA-15; Rods; Modulus; Sodium silicate; MORPHOLOGICAL CONTROL; NANOPARTICLES; ADSORPTION; PORES; EVOLUTION; SYSTEM; ROUTE; SIZE;
D O I：
10.1016/j.matlet.2012.01.091
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Monodispersed and highly ordered mesoporous silica SBA-15 rods with controllable size were synthesized by using triblock copolymer Pluronic P123 (EO20-PO70-EO20) as a structure-directing agent and sodium silicate as silica source without any additives. The rods' length (800-1200 nm) and diameter (300-500 nm) were tuned by varying the modulus (molar ratio SiO2/Na2O) of sodium silicate. The effect of the modulus on the structure and morphology of mesoporous silica SBA-15 was investigated. The size and structural order of the products were found to be greatly affected by modulus. The results suggested that with the increase of modulus, the length of rods decreased and the diameter increased. Moreover, a higher modulus favored the formation of higher ordered SBA-15 rods. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：45 / 47
页数：3
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