Synthesis of hierarchical nanocrystalline ZSM-5 with controlled particle size and mesoporosity

[Display omitted] ► One step synthesis of nanocrystalline, mesoporous ZSM-5 zeolite from a single template. ► ZSM-5 crystals as small as 6 nm in mesoporous aggregates of approximately 200 nm in diameter. ► The size and mesoporosity were controlled by pH and the hydrothermal treatment conditions. Dev...

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Bibliographic Details
Published in:	Microporous and mesoporous materials Vol. 137; no. 1; pp. 92 - 100
Main Authors:	Petushkov, Anton, Yoon, Suhyoung, Larsen, Sarah C.
Format:	Journal Article
Language:	English
Published:	San Diego, CA Elsevier Inc 2011 Elsevier
Subjects:	Catalysis Chemistry Colloidal state and disperse state Crystals Exact sciences and technology General and physical chemistry Hierarchical Ion-exchange Mesoporous Nanocrystalline Nanocrystals Particle size Porosity Porous materials Surface area Surface physical chemistry Synthesis Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Zeolites Zeolites: preparations and properties ZSM-5 Hierarchical Synthesis Mesoporous ZSM-5 Nanocrystalline Particle size Transport properties Separation Micropore Porous material Template Particle Pore size Hydrothermal treatment pH Catalysis Diffusion Diameter Nanocrystal Catalytic reaction Crystals Mesoporosity Microporosity Pore Distribution Aggregate Surface area
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Summary:	[Display omitted] ► One step synthesis of nanocrystalline, mesoporous ZSM-5 zeolite from a single template. ► ZSM-5 crystals as small as 6 nm in mesoporous aggregates of approximately 200 nm in diameter. ► The size and mesoporosity were controlled by pH and the hydrothermal treatment conditions. Development of new zeolite based materials is essential for a variety of applications in catalysis, separations, and medicine. Increasing the specific surface area and decreasing the micropore diffusion pathlength in zeolites are important factors for improving the performance of zeolites in catalytic applications and these factors can be optimized by decreasing the zeolite particle size. Creation of a hierarchical zeolite material that possesses both micro- and mesopores with very large surface areas and improved mass transport properties is an effective solution. In this study, a facile approach to a one step synthesis of nanocrystalline ZSM-5 zeolite from a single template system in 12–24 h at 140 °C and with high yield is presented. ZSM-5 zeolite crystals as small as 6 nm which form mesoporous aggregates of approximately 200 nm in diameter were synthesized using this method. The mesopore volume and size distribution showed a dependence on particle size such that smaller particles lead to higher mesopore volumes and narrower pore size distributions. The size of individual crystals, as well as mesopore surface area and pore volume can be controlled by adjusting the pH of the reaction mixture, as well as the hydrothermal treatment temperature and duration.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1387-1811 1873-3093
DOI:	10.1016/j.micromeso.2010.09.001