乙二醇
材料科学
介孔材料
共聚物
化学工程
PEG比率
扫描电子显微镜
介孔二氧化硅
聚乙烯醇
透射电子显微镜
模板方法模式
纳米技术
催化作用
有机化学
化学
复合材料
聚合物
财务
工程类
经济
作者
Xian Wang,Xinrui Miao,Zhuomin Li,Wenli Deng
标识
DOI:10.1016/j.jnoncrysol.2009.12.029
摘要
We report a single-step, emulsion-templating method using triblock copolymer poly(ethylene glycol)–poly(propylene glycol)–poly(ethylene glycol) (PEG–PPG–PEG) as template, sodium silicate or tetraethylorthosilicate (TEOS) as precursor and n-octane and benzyl alcohol as cosolvents. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results revealed that ordered mesoporous silica hollow microspheres with thickness of shell about 50 nm and mean diameter 1 μm were prepared by changing the concentration of the reactant, pH and reaction time. Brunauer–Emmett–Teller (BET) analysis confirmed that silica hollow microspheres were porous. Generally, the hierarchical structures of mesoporous silica can be regulated from hollow spheres to solid particles by changing the concentration of benzyl alcohol. This methodology provides a versatile and effective route for preparation of mesoporous hollow materials.
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