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首页> 外文会议>ACS Symposium Series 890; Symposium on Nanotechnology and the Environment: Applications and Implications; ; >Nanocrystalline Metal Oxides: A New Family of Mesoporous Inorganic Materials Useful for Destructive Adsorption of Environmental Toxins
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Nanocrystalline Metal Oxides: A New Family of Mesoporous Inorganic Materials Useful for Destructive Adsorption of Environmental Toxins

机译：纳米晶体金属氧化物：介孔无机材料的新家族，可用于破坏性吸附环境毒素

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摘要

Although nanoscale materials promise to revolutionize many of our industries, including electronics, health care, energy and more, the near term uses are in environmental remediation and green chemistry applications. One reason for this is that nanomaterials present unique properties as adsorbents and catalysts, because: (1) they possess high surface areas with large surface to bulk ratios so that the nanomaterial is used efficiently; (2) nanocrystals have unusual shapes and possess high surface concentrations of reactive edge, comer, and defect sites that impart intrinsically higher surface reactivities; (3) a wide range of Lewis acid/base properties and oxidation/reduction potential can be engineered into the nanomaterials since the periodic table of the elements (and their oxides, sulfides, etc.) becomes a literal playground for their design, and in a sense becomes three-dimensional since nanocrystal size is important as well as chemical potential; and (4) many nanocrystalline materials, especially ionic metal oxides, can be aggregated (pelletized) while still maintaining high surface areas and open pore structures. Therefore, these nanomaterials represent a new family of porous, inorganic sorbent/catalyst materials perhaps as potentially useful as the zeolites and other fascinating and useful materials, for example the MCM-41 silica series, and the ETS-10 titania-silica zeolitic materials.
机译：尽管纳米级材料有望彻底改变我们的许多行业，包括电子，医疗保健，能源等，但近期用途是在环境修复和绿色化学应用中。原因之一是纳米材料作为吸附剂和催化剂具有独特的性能，因为：（1）它们具有高的表面积和较大的表面积/体积比，从而可以有效地利用纳米材料； （2）纳米晶体具有不寻常的形状，并具有高表面活性边缘，角和缺陷位点的表面浓度，从而赋予表面更高的表面活性。 （3）由于元素的周期表（及其氧化物，硫化物等）成为其设计的字面意义，因此可以在纳米材料中工程化多种路易斯酸/碱性质和氧化/还原电位。由于纳米晶体的大小以及化学势都很重要，因此感觉变成了三维。 （4）许多纳米晶体材料，尤其是离子金属氧化物，可以聚集（造粒），同时仍保持高表面积和开孔结构。因此，这些纳米材料代表了新型的多孔无机吸附剂/催化剂材料家族，它们可能与沸石和其他引人入胜的有用材料（例如MCM-41二氧化硅系列和ETS-10二氧化钛-二氧化硅沸石材料）一样潜在地有用。

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