Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (08): 737-741.doi: 10.3866/PKU.WHXB20030813

• ARTICLE • Previous Articles     Next Articles

A New Route to Fabricate Highly Ordered Three-dimensional Macroporous Al2O3

Wu Quan-Zhou;Shen Yong;Li Yu-Guang   

  1. School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275
  • Received:2003-02-17 Revised:2003-04-02 Published:2003-08-15
  • Contact: Li Yu-Guang

Abstract: Using low-cost Al(NO3)3•9H2O as raw material and citric acid as chelator, highly ordered three-dimensional macroporous (3DOM) Al2O3 with pore size of 250~350 nm has been successfully fabricated by a template method in which polystyrene colloidal crystal with diameter of about 600 nm were used as template. The TGA, TG-IR and SEM observations show that adding citric acid is in favor of forming the three-dimensional ordered structure since it can avoid forming agglomerated particles during heat treatment. Within the range of 0.5~0.8 mol•L-1 of the precursor concentration, the Al2O3 samples obtained are highly ordered three-dimensional macroporous materials, and such macroporou structure is maintained up to 1 100 ℃,showing a high thermostability.

Key words: Three-dimensional ordered macropore, Al2O3, Polystyrene colloidal crystal