Functionalized monolayers on ordered mesoporous supports
Functionalized monolayers on ordered mesoporous supports
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DOI：
10.1126/science.276.5314.923
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发表时间：
1997-05-09
期刊：
影响因子：
56.9
通讯作者：
Kemner, KM
中科院分区：
文献类型：
--
作者：
Feng, X;Fryxell, GE;Kemner, KM
合成了含有官能化有机单分子膜的介孔二氧化硅材料，固体核磁共振研究表明，硫代丙基硅烷的交联单分子膜与介孔二氧化硅共价键合，紧密堆积在介孔二氧化硅表面。单层的相对表面覆盖率可以系统地变化高达76%。这些材料在去除水和非水废水中的汞和其他重金属方面非常有效，分配系数高达34万。这些材料的稳定性以及再生和再利用的潜力也得到了证明。本文报道的表面改性方案能够合理地设计定制的多孔材料的表面性质，并可能导致合成更复杂的环境和工业应用的功能化复合材料。
Mesoporous silica materials containing functionalized organic monolayers have been synthesized, Solid-state nuclear magnetic resonance suggests that a cross-linked monolayer of mercaptopropylsilane was covalently bound to mesoporous silica and closely packed on the surface. The relative surface coverage of the monolayers can be systematically varied up to 76 percent. These materials are extremely efficient in removing mercury and other heavy metals from both aqueous and nonaqueous waste streams, with distribution coefficients up to 340,000. The stability of these materials and the potential to regenerate and reuse them have also been demonstrated. The surface modification scheme reported here enables rational design of the surface properties of tailored porous materials and may lead to the synthesis of more sophisticated functionalized composites for environmental and industrial applications.