Nanocrystalline mesoporous zeolite X with a considerable external surface area prepared via an ordered precursor: a potential adsorbent

Xu Wang; Bin Yang; Jinghong Ma; Chunfeng Fen; Ruifeng Li

Nanocrystalline mesoporous zeolite X with a considerable external surface area prepared via an ordered precursor: a potential adsorbent

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Author(s): Xu Wang ¹ ; Bin Yang ¹ ; Jinghong Ma ¹ ; Chunfeng Fen ¹ ; Ruifeng Li ¹
- Affiliations: 1: Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
Source: Volume 11, Issue 11, November 2016, p. 719 – 721
DOI: 10.1049/mnl.2016.0325 , Online ISSN 1750-0443

Received 24/05/2016, Accepted 20/07/2016, Published 01/11/2016

A nanocrystal zeolite X with intracrystalline mesopores has been successfully prepared by using organofunctionalised mesoporous silica in hydrothermal system. The as-prepared zeolitic material persist the inherent framework structure of FAU zeolite, and present a crystallographic morphology of stacked three-dimensional intergrowths made up of rectangular nanocrystals. The intracrystalline mesopores are formed via a bond-blocking principle with hydrophobic carbon chains of organosilane inhibiting the growth of zeolite units and crystals in the channels of mesoporous silica during hydrothermal synthesis. The results showed that the zeolitic material has a considerable external surface area (247 m²g⁻¹)and mesopore volume (0.44 cm³g⁻¹), maintaining high Brunauer–Emmett–Teller surface area (991 m²g⁻¹) and large total pore volume (0.71 cm³g⁻¹), and clearly stating a larger adsorption capacity for p-xylene at relative higher pressure.

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Nanocrystalline mesoporous zeolite X with a considerable external surface area prepared via an ordered precursor: a potential adsorbent

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