Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (09): 1121-1125.doi: 10.3866/PKU.WHXB20060917

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Three Dimensional Ordered Macroporous ZrO2 Prepared by Directly Calcining ZrOCl2

SHEN Yong;WU Quan-Zhou;LI Yu-Guang   

  1. (School of Chemistry and Chemical Engineering, SunYat-sen University, Guangzhou 510275, P. R. China)
  • Received:2006-03-09 Revised:2006-05-17 Published:2006-09-04
  • Contact: SHEN Yong

Abstract: Three dimensional ordered macroporous (3DOM) zirconium dioxides with pore diameters of about 500 nm are successfully prepared via a direct calcining step, using a methanol solution of ZrOCl2•8H2O as filling precursor and polystyrene sphere (PS) colloid crystals as templates. The method of synthesis is simple, quicker than other synthesis, and based on readily available precursors. Precursor concentration and a second filling of the 3D packed polystyrene spheres are important parameters in fine tuning the mechanical properties of the walls and achieving long range ordered materials. Low calcination temperature (≤500 ℃) introduces impurities in the wall structure of zirconia and crystallite phase transformation in the crystal structure. Excess high calcination temperature (≥ 800 ℃) leads the 3D wall structure destroyed and collapse. The BET behaviour of 3DOM-ZrO2 shows that pore wall has a non-porous structure, which agrees with the TEM results.

Key words: ZrO2, Polystyrene sphere, 3DOM, Colloid crystal