Hollow Zeolite Single Crystals: Synthesis Routes and Functionalization Methods,Small Methods

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Hollow Zeolite Single Crystals: Synthesis Routes and Functionalization Methods
Small Methods ( IF 10.7 ) Pub Date : 2018-09-19 , DOI: 10.1002/smtd.201800197
Alain Tuel ₁ , David Farrusseng ₁

Affiliation

Hollow zeolite single crystals represent a new class of materials that have received considerable attention over the last decade. Besides facilitating the transport of molecules in zeolite crystals, the cavity present in hollow crystals offers many possibilities for encapsulating active species and constitutes a closed space that can be used as a nanoreactor. However, despite the simplicity of the concept, the synthesis of hollow zeolites is difficult, as it necessitates to control the chemistry and the spatial distribution of elements throughout the crystals. Here, the different strategies that can be used to transform bulk zeolite crystals into hollow analogs are reported. In particular, selective dissolution as well as dissolution–recrystallization methods are discussed in detail in the case of zeolites with mobile five (MFI) framework type. More sophisticated fabrication strategies are also described for two other major zeolites, namely, zeolites Beta and Y. Additionally, methods to introduce metal nanoparticles with controlled size and composition in the cavity are also addressed. The review ends with concluding remarks, including major challenges and future outlooks in the field.

中文翻译：

中空沸石单晶：合成路线和功能化方法

空心沸石单晶代表了新型材料，在过去的十年中受到了相当大的关注。除了促进分子在沸石晶体中的运输外，中空晶体中存在的空腔还提供了许多封装活性物质的可能性，并构成了可用作纳米反应器的封闭空间。然而，尽管概念简单，但是中空沸石的合成是困难的，因为必须控制整个晶体中元素的化学和空间分布。在此，报道了可用于将块状沸石晶体转变成空心类似物的不同策略。特别是，对于具有可移动5（MFI）骨架类型的沸石，将详细讨论选择性溶解以及溶解-再结晶的方法。还描述了用于两种其他主要沸石，即β和Y型沸石的更复杂的制备策略。此外，还讨论了将具有受控尺寸和组成的金属纳米颗粒引入腔体中的方法。审查以结语结束，包括该领域的主要挑战和未来展望。

更新日期：2018-09-19

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