Al2O3 Microspheres Prepared by Cathode Plasma Electrolysis

Al2O3 microspheres were prepared by cathode plasma electrolysis (CPE) in an aqueous solution of Al(NO)3·9H2O. Compared with high-temperature calcination methods, the CPE method afforded the preparation of microspheres directly at room temperature. The results showed that regular microspheres formed under relatively high concentrations of Al(NO)3·9H2O. The microspheres, with diameters mostly in the range of 5–30 μm, consisted of γ-Al2O3 and α-Al2O3. The possible formation mechanism included the following processes: (1) Al(OH)3 intermediate was formed during the cathodic reactions; (2) plasma energized the intermediate to Al2O3; and (3) microspheres formed under the effect of the surface tension.

[1]  Hongchang Pang,et al.  Fabrication synthesis of porous Al2O3 hollow microspheres and its superior adsorption performance for organic dye , 2016 .

[2]  Sun Zhenguo,et al.  Preparation of Al2O3 poly-hollow microsphere (PHM) ceramics using Al2O3 PHMs coated with sintering additive via co-precipitation method , 2015 .

[3]  Jimin Fang,et al.  Study of the preparation of γ-Al2O3 nano-structured hierarchical hollow microspheres with a simple hydrothermal synthesis using methylene blue as structure directing agent and their adsorption enhancement for the dye , 2015 .

[4]  Tian Gan,et al.  Pt nanoparticles-functionalized hierarchically porous γ-Al2O3 hollow spheres based electrochemical sensor for ultrasensitive guaiacol detection , 2015 .

[5]  Q. Liao,et al.  Synthesis of millimeter-scale Al2O3 ceramic hollow spheres by an improved emulsion microencapsulation method , 2015 .

[6]  F. Kang,et al.  Facile synthesis of hierarchical porous γ-Al2O3 hollow microspheres for water treatment. , 2014, Journal of colloid and interface science.

[7]  G. Luo,et al.  In situ preparation of Pd/Al2O3–SiO2 composite microspheres by combining a sol–gel process and precipitation process in a microchannel , 2014 .

[8]  K. Zhou,et al.  Porous Al2O3 microspheres prepared by a novel ice-templated spray drying technique , 2014 .

[9]  A. B. Pandit,et al.  Preparation of Alumina and Alumina-Ceria Microspheres using an Internal Gelation Process and their Characterization , 2012 .

[10]  P. Gupta,et al.  Electrolytic plasma technology: Science and engineering—An overview , 2007 .

[11]  L. Xiuyan,et al.  Preparation of bauxite ceramic microsphere , 2007 .

[12]  Y. Shimizu,et al.  Preparation of hollow alumina microspheres by microwave-induced plasma pyrolysis of atomized precursor solution , 2005 .

[13]  R. Mokaya,et al.  Hollow spheres of crystalline porous metal oxides: A generalized synthesis route via nanocasting with mesoporous carbon hollow shells , 2005 .

[14]  Z. Károly,et al.  Preparation of Hollow Alumina Microspheres by RF Thermal Plasma , 2004 .

[15]  Z. Károly,et al.  Hollow alumina microspheres prepared by RF thermal plasma , 2003 .

[16]  Y. Shimizu,et al.  Fabrication of hollow alumina microspheres via core/shell structure of polymethylmethacrylate/alumina prepared by mechanofusion , 2002 .

[17]  Jiechao Jiang,et al.  Electrolytic plasma processing for cleaning and metal-coating of steel surfaces , 2002 .

[18]  V. Jayaraman,et al.  Synthesis of beta alumina from aluminum hydroxide precursor formed by gel to crystallite conversions , 1996 .