Crystal engineering of zeolites with graphene
Crystal engineering of zeolites with graphene
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DOI：
10.1039/c4nr00320a
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发表时间：
2014-01-01
期刊：
影响因子：
6.7
通讯作者：
Eder, Dominik
中科院分区：
文献类型：
--
作者：
Gebhardt, Paul;Pattinson, Sebastian W.;Eder, Dominik
在纳米尺度上实现对沸石晶体形态的控制对于提高其在催化、传感器和分离等多种应用中的性能至关重要。然而，沸石合成工艺的复杂性和敏感性通常使得这种控制高度经验性且难以实施。我们证明，石墨烯可以显着改变钛硅分子筛（TS-1）颗粒的形态，特别是能够将其尺寸从几百纳米减小到小于10纳米。通过电子显微镜和分子力学模拟，我们提出了一种机制，这种变化的基础上的优先相互作用的特定TS-1表面与苄醇介导的石墨烯。这些发现提出了一种控制沸石形态的简单新方法，从而也进一步证明了石墨烯在混合材料中的潜力。此外，该机制的通用性为使用二维材料设计功能无机晶体的研究指明了新的途径。
Achieving control over the morphology of zeolite crystals at the nanoscale is crucial for enhancing their performance in diverse applications including catalysis, sensors and separation. The complexity and sensitivity of zeolite synthesis processes, however, often make such control both highly empirical and difficult to implement. We demonstrate that graphene can significantly alter the morphology of titanium silicalite (TS-1) particles, in particular being able to reduce their dimensions from several hundreds to less than 10 nm. Through electron microscopy and molecular mechanics simulations we propose a mechanism for this change based on the preferential interaction of specific TS-1 surfaces with benzylalcohol-mediated graphene. These findings suggest a facile new means of controlling the zeolite morphology and thereby also further demonstrate the potential of graphene in hybrid materials. Moreover, the generality of the mechanism points the way to a new avenue of research in using two-dimensional materials to engineer functional inorganic crystals.