Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (11): 3106-3112.doi: 10.3866/PKU.WHXB20101114

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Fabrication of Al2O3 Nanoparticles by Cathodic Plasma Electrolysis

LI Zhao-Hu, ZHANG Zhi-Kun, GUO Deng-Zhu   

  1. Key Laboratory for Physics and Chemistry of Nanodevices, Ministry of Education, Department of Electronics, Peking University, Beijing 100871, P. R. China
  • Received:2010-05-24 Revised:2010-07-22 Published:2010-10-29
  • Contact: GUO Deng-Zhu E-mail:guodz@pku.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (60971002) and National Key Basic Research Programof China (973) (2006CB932402).

Abstract:

We used aluminum as the cathodic material and an aqueous solution of 3 mol·L-1 NH4NO3 as the electrolyte in our work. Al2O3 nanoparticles were fabricated using asymmetrical electrodes during cathodic plasma electrolysis. The morphology and structure of the particles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray energy dispersion (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). We identified cubic Al2O3 as the main component. The changes in current and optical emission phenomena during the cathodic plasma electrolysis were also studied. Based on the experimental results, we discuss the mechanisms responsible for particle formation.

 

Key words: Cathodic plasma electrolysis, Al2O3 nanoparticle, Cathodic ablation, Solution oxidation, Microscopic characterization

MSC2000: 

  • O646.541