title: Well-organized zeolite nanocrystal aggregates with interconnected hierarchically micro-meso-macropore systems showing enhanced catalytic performance.
abstract: Preparation and characterization of well-organized zeolitic nanocrystal aggregates with an interconnected hierarchically micro-meso-macro porous system are described. Amorphous nanoparticles in bimodal aluminosilicates were directly transformed into highly crystalline nanosized zeolites, as well as acting as scaffold template. All pores on three length scales incorporated in one solid body are interconnected with each other. These zeolitic nanocrystal aggregates with hierarchically micro-meso-macroporous structure were thoroughly characterized. TEM images and (29)Si NMR spectra showed that the amorphous phase of the initial material had been completely replaced by nanocrystals to give a micro-meso-macroporous crystalline zeolitic structure. Catalytic testing demonstrated their superiority due to the highly active sites and the presence of interconnected micro-meso-macroporosity in the cracking of bulky 1,3,5-triisopropylbenzene (TIPB) compared to traditional zeolite catalysts. This synthesis strategy was extended to prepare various zeolitic nanocrystal aggregates (ZSM-5, Beta, TS-1, etc.) with well-organized hierarchical micro-meso-macroporous structures.
authors: State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P.R. China. xyyang@fundp.ac.be
authors: Xiao-Yu
authors: XY
authors: Yang
authors: Ge
authors: G
authors: Tian
authors: Li-Hua
authors: LH
authors: Chen
authors: Yu
authors: Y
authors: Li
authors: Joanna C
authors: JC
authors: Rooke
authors: Ying-Xu
authors: YX
authors: Wei
authors: Zhong-Min
authors: ZM
authors: Liu
authors: Zhao
authors: Z
authors: Deng
authors: Gustaaf
authors: G
authors: Van Tendeloo
authors: Bao-Lian
authors: BL
authors: Su