复合模板剂下有序介孔TiO_2的制备研究
Synthesis of Ordered Mesoporous TiO_2 on a Composite Surfactant template
查看参考文献12篇
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文摘
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在复合模板剂聚氧化烯十二烷基醚（Brij35)和聚乙二醇（PEG）下，制备出有序介孔TiO2。用XRD、HRTEM、SEM、FT-IR和N2吸附脱附等方法进行表征；并通过对反应过程中电导率和粘度的连续监测，分析有序介孔TiO2形成过程。研究表明，介孔TiO2为规整的六方排列结构，在低于400℃焙烧，有序结构稳定性高，比表面积达252m^2·g^-1，孔径3.4nm，晶型为锐钛矿；经500℃焙烧，有序介孔结构破坏，并开始出现金红石型晶相。有序介孔TiO2形成过程是基于在高极性介质中非极性的碳氢链聚集成为胶束，同时钛酸丁酯（TBOT）在已形成的胶束上聚庥，在酸作用下不断水解缩聚而形成有序介孔结构，有效控制水解和聚合过程是控制介孔材料结构形成的关键。 |
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其他语种文摘
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On a composite surfactant template(Brij35 and PEG), ordered mesoporous TiO2 was synthesized successfully. The formation of the ordered mesoporous TiO_2 was analyzed by continuously monitoring the conductivity and viscosity during the reaction process, the ordered mesoporous TiO_2 formed was characterized by XRD, HRTEM, SEM, FT-IR and N2 adsorption and desorption methods. The results indicated that ordered mesoporous TiO_2 was of a hexagonal packed structure, at a temperature below 400 t, ordered mesoporous TiO_2 has a higher thermal stability and a higher surface area of 252 m~2 · g~(-1), the mesoporous pore diameter was uniform with a value of 3. 4 nm and the crystal was in anatase phase. After TiO_2 was calcined at 500 t, ordered mesoporous structure was destroyed somewhat, and the formation of rutile phase appeared. The results also showed that liquid crystal template played a key role for the reaction, especially in a high polar media, in which non-polar carbon-hydrogen chain easily coagulated forming micelle, and TBOT gathered around the micelle formed, when they were acted by acid, reaction took place gradually to generate ordered mesoporous structure TiO_2. It was found that taking efficient measures to control the hydrolysis and condensation processes of the reaction was the key of forming ordered mesoporous structure TiO_2. |
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来源
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物理化学学报
,2003,19(3):251-255 【核心库】
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关键词
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介孔TiO2
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复合模板剂
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电导率
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粘度
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胶束
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地址
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1.
东北大学理学院材料物理系, 沈阳, 110004
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中国科学院金属研究所, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6818 |
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学科
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化学工业 |
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基金
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国家973计划
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文献收藏号
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CSCD:1293232
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参考文献 共
12
共1页
|
|
1.
Kresge C T.
Nature,1992,359:710
|
被引
1266
次
|
|
|
|
|
2.
Beck J S.
J Am Chem Soc,1992,114:10834
|
被引
886
次
|
|
|
|
|
3.
Cai Q.
Chem Mater,2001,13:258
|
被引
40
次
|
|
|
|
|
4.
宋春敏. 高表面积MCM－41的合成与性能.
物理化学学报,2002,18(3):279
|
被引
6
次
|
|
|
|
|
5.
Antonelli D M.
Inorg Chem,1996,35:3126
|
被引
15
次
|
|
|
|
|
6.
Yang P D.
Nature,1998,396:152
|
被引
123
次
|
|
|
|
|
7.
Schuth F.
Chem Mater,2001,13:3184
|
被引
34
次
|
|
|
|
|
8.
Antonelli D M.
Angew Chem Int Ed Engl,1995,34(18):2014
|
被引
71
次
|
|
|
|
|
9.
Yang P D.
Chem Mater,1999,11:2813
|
被引
45
次
|
|
|
|
|
10.
乐英红. 二氧化钛介孔分子筛的合成和表征.
化学学报,2000,58(7):777
|
被引
10
次
|
|
|
|
|
11.
郑金玉. 有机小分子模板法合成二氧化钛中孔材料.
高等学校化学学报,2000,21(4):647
|
被引
18
次
|
|
|
|
|
12.
沈钟.
胶体与表面化学,1997:322
|
被引
3
次
|
|
|
|
|
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