کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1267200 | 972326 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Organized and highly dispersed growth of MnO2 nano-rods by sonochemical hydrolysis of Mn(3)acetate Organized and highly dispersed growth of MnO2 nano-rods by sonochemical hydrolysis of Mn(3)acetate](/preview/png/1267200.png)
Highly dispersed and non-agglomerated α-MnO2 nano-needles of dimensions 20–30 nm have been synthesized by the application of ultrasound radiation on the aqueous solution consisting of manganese(3)acetate close to neutral pH followed by mild drying. With a similar reaction system, hot hydrolysis (non-sonochemical process) produced β-MnO2 nano-rods of length 100–200 nm but with high degree agglomeration. Sonochemical cavitation phenomenon is suggested to have a pronounced effect for the formation of special phase and morphology. The effect is proved by the difference in the intermediate products which has difference in crystalinity and phase-purity. The intermediate phases are identified to be single-phase γ-MnOOH for the non-sonochemical reaction and mixture of γ-MnOOH, α-MnO2 and β-MnO2 for the sonochemical products.
Journal: Ultrasonics Sonochemistry - Volume 13, Issue 6, September 2006, Pages 549–556