| PW_(11)/SBA-15介孔杂化材料的直接合成与表征 |
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| 引用本文： | 王金娥,杨春. PW_(11)/SBA-15介孔杂化材料的直接合成与表征[J]. 物理化学学报, 2010, 26(2): 515-520. DOI: 10.3866/PKU.WHXB20100211 |
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| 作者姓名： | 王金娥 杨春 |
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| 作者单位： | Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, P. R. China |
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| 基金项目： | The project was supported by the National Natural Science Foundation of China (20473037).国家自然科学基金 |
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| 摘 要： | 采用三嵌段共聚物EO20PO70EO20(P123)为模板剂,正硅酸乙酯(TEOS)和缺位Keggin型多金属氧酸盐Na7PW11O39(PW11)为无机前驱体,由共缩合法一步合成了PW11/SBA-15介孔杂化材料.通过红外(IR)光谱、紫外-可见漫反射光谱(UV-Vis/DRS)、X射线衍射(XRD)、低温N2吸附、透射电子显微镜(TEM)等手段对杂化材料和合成过程进行了表征.结果表明:杂化材料中不仅多金属氧酸盐的Keggin单元保留完整,且共价键联于介孔孔道内部,而且样品基本具有规整有序的六方介孔结构.TEOS预水解时间的长短对有序结构的构筑有明显影响,随预水解时间延长,样品的介观有序性增加.这是因为多金属氧酸盐对模板剂P123有盐析作用,其作用大小与多金属氧酸盐前驱物的溶解度有关.
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| 关 键 词： | 介孔分子筛 多金属氧酸盐 杂化材料 Na7PW11O39 SBA-15 |
| 收稿时间： | 2009-09-04 |
| 修稿时间： | 2009-10-26 |
Direct Syntheses and Characterizations of PW_(11)/SBA-15 Mesoporous Hybrid Materials |
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| WANG Jin-E,YANG Chun. Direct Syntheses and Characterizations of PW_(11)/SBA-15 Mesoporous Hybrid Materials[J]. Acta Physico-Chimica Sinica, 2010, 26(2): 515-520. DOI: 10.3866/PKU.WHXB20100211 |
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| Authors: | WANG Jin-E YANG Chun |
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| Affiliation: | Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, P. R. China |
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| Abstract: | The hybrid mesoporous materials,PW11/SBA-15,were synthesized using tetraethoxysilane (TEOS) and lacunary polyoxometalate Na7PW11O39 (PW11) by a co-condensation approach in the presence of triblock copolymer EO20PO70EO20 (P123) as a template. The resultant materials were characterized by infrared (IR) spectroscopy,UV-Vis diffuse reflectance spectroscopy (UV-Vis/DRS),powder X-ray diffraction (XRD),N2 adsorption-desorption,and transmission electron microscopy (TEM). Results show that the Keggin units are retai... |
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| Keywords: | Na_7PW_(11)O_(39) SBA-15 Mesoporous molecular sieve Polyoxometalate Hybrid materials Na_7PW_(11)O_(39) SBA-15 |
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