Marvelous self-assembly of hierarchically nanostructured porous zirconium phosphate solid acids with high thermal stability

Zhong Yong Yuan, Tie Zhen Ren, Ammar Azioune, Jean Jacques Pireaux, Bao Lian Su

Research output: Contribution to journalArticle

Abstract

A hierarchical structure of thermally stable macroporous zirconium phosphate solid acids with supermicroporous walls was prepared by a simple self-assembly process from the precursors of zirconium propoxide and orthophosphoric acid solution. The macroporous structures are uniform with the diameters ranging from 300 to 800 nm, one-dimensional channel-like. The effect of surfactant Brij 56 on the formation of macroporous structures has been studied. The frameworks of the synthesized hierarchical zirconium phosphates are amorphous with Zr-O-P bonding, exhibiting remarkably high thermal stability (at least 800 °C), on the basis of the X-ray diffraction (XRD), N2 adsorption, X-ray photoelectron spectroscopy (XPS) analysis, Fourier transform infrared (FT-IR) and 31P nuclear magnetic resonance (NMR) spectra. Larger quantities of Zr-OH and P-OH groups are observed besides surface hydroxyl groups, suggesting the presence of acidity and the possibility of surface functionalization for practical applications including catalysis. The macroporous zirconium phosphates with hierarchical structures could also be the potential and efficient catalyst supports for the design of the structured catalysts and reactors.

Original languageEnglish
Pages (from-to)647-654
Number of pages8
JournalCatalysis Today
Volume105
Issue number3-4
DOIs
Publication statusPublished - 15 Aug 2005

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Keywords

  • Acidic property
  • Macroporous structure
  • Self-assembly
  • Supermicroporosity
  • Zirconium phosphate

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