PREPARATION OF NANOSTRUCTURE MnO$_{\bf 2}$ SINGLE CRYSTAL IN VARIOUS ACID SOLUTION
Received date: 2010-02-11
Revised date: 2010-04-28
Online published: 2010-07-11
Supported by
Supported by National Natural Science Foundation of China (No.50762003) and Natural Science Foundation of Hainan Province (No.807009)
Nanostructure MnO2 single crystal was prepared through redox reactions of potassium permanganate in different inorganic acid (hydrochloric acid, sulfuric acid and nitric acid) and organic acid (acetate). The products were characterized by TEM and XRD. It indicated that the crystal structure and morphology of the synthesized MnO2 can be tailored by adjusting the pH value in solution and reaction temperature. It was also found that layer folded δ-MnO2 microspheres were obtained at low reaction temperature and low hydrochloric acid concentration, whereas α-MnO2 single-crystal nanorods were fabricated with increased reaction temperature and hydrochloric acid concentration. The possible formation mechanism of δ-MnO2 microspheres and α-MnO2 nanorods is also discussed.
Key words： MnO2; nanostructures; redox reaction
CHEN Yong , HONG Yu-Zhen , MA Yan-Beng , YANG Hao , LI Jian-Bao . PREPARATION OF NANOSTRUCTURE MnO$_{\bf 2}$ SINGLE CRYSTAL IN VARIOUS ACID SOLUTION[J]. Acta Metall Sin, 2010 , 46(7) : 857 -861 . DOI: 10.3724/SP.J.1037.2010.00088
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