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Citation: YANG Ze-Heng, SONG Xin-Min, ZHANG Wei-Xin, WANG Hua, WANG Fang. Synthesis and Catalytic Performance of α-/β-MnO₂ Nanorods[J]. Chinese Journal of Applied Chemistry, ;2008, 25(1): 13-16. shu

Synthesis and Catalytic Performance of α-/β-MnO₂ Nanorods

1.
School of Chemical Engineering, Hefei University of Technology, Hefei 230009

Corresponding author: YANG Ze-Heng,
Received Date: 5 February 2007
Available Online: 26 May 2007
Fund Project: 国家自然科学基金(20576024) (20576024)安徽省自然科学基金(070414165)资助项目 (070414165)

α-and β-MnO₂ nanorods were successfully prepared by a hydrothermal method based on the redox reaction of KMnO₄ and ascorbic acid(AA).XRD,TEM techniques were used to characterize the as-prepared MnO₂ samples.The results indicated that reaction temperature and reaction time were the key factors to determine the crystallographic forms of the final products from the hydrothermal system,in which the molar ratio of AA to KMnO₄ was 1:5.α-MnO₂ nanorods were obtained when the reaction was conducted at 150~160℃ for 12 h,while β-MnO₂ nanorods were prepared at 170℃ for 24 h.The catalytic activities of the as-prepared MnO₂ nanorods and commercial MnO₂ were evaluated by minitoring the degradation of fuchsin acid in the presence of H₂O₂.Both α-and β-MnO₂ nanorods exhibited higher catalytic activity on the degradation of fuchsin acid than bulk MnO₂.β-MnO₂ had the highest activity among the three,resulting in 97.6% decoloration of the fuchsin acid solution within 60 minutes.
- hydrothermal method,
- nano MnO₂,
- fuchsin acid,
- catalytic activity
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Synthesis and Catalytic Performance of α-/β-MnO₂ Nanorods