Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (10): 2286-2294.doi: 10.3866/PKU.WHXB201307151


Controllable Preparation of Rambutan-Shape AlOOH/Al2O3 Nanomaterials with a Composite Soft Template

XU Jing, QIANG Jin-Feng, WANG Rui-Juan, NIU Wen-Jun, SHEN Ming   

  1. College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu Province, P. R. China
  • Received:2013-05-02 Revised:2013-07-15 Published:2013-09-26
  • Contact: SHEN Ming
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21273194) and Priority Academic Program Development of Jiangsu Higher Education Institutions, China.


Using PEG4000-DL-aspartic acid as a composite soft template, Al(NO3)3 as an aluminumsource and urea as an alkali source, homogeneous rambutan-shaped AlOOH nanomaterials were successfully synthesized by a simple heating method under atmospheric conditions. The effects of the concentrations of reactants and additives on the morphology and size of the particles were studied and the possible formation mechanismof the γ-AlOOH nanostructures was explored. The rambutan-like γ-AlOOH particles had a core-shell structure resembling a ball within a ball. Based on the statistical results fromSEMimages of the particles, the ball diameter, external diameter, shell thickness and length of burr-like projections were about 400, 600, 15 and 60 nm, respectively. Results indicate that γ-Al2O3 retained the morphology of the AlOOH precursor following calcination at 600℃ for 5 h. Brunauer-Emmett-Teller (BET) N2-adsorption experiments showed that the specific surface area of rambutan-shaped γ-Al2O3 reached as high as 299.97 m2·g-1.

Key words: Alumina nanostructure, Polyethylene glycol, DL-aspartic acid, Composite soft template, Atmospheric refluxing