Submicrocubes and highly oriented assemblies of MnCO3 synthesized by ultrasound agitation method and their thermal transformation to nanoporous Mn2O3.
MnCO(3) submicrocubes and highly oriented MnCO(3) nanocrystal assemblies with an ellipsoidal morphology have been successfully prepared by an ultrasonic solution approach. The effect of surfactants of sodium dodecylsulfate (SDS) and aerosol OT (AOT) on the morphology of MnCO(3) was investigated. Highly oriented ellipsoidal assemblies composed of approximately 5 nm MnCO(3) nanocrystals with porous nanostructures were prepared in the presence of SDS. Both sonochemical irradiation and surfactant play an important role in the formation of these highly oriented assemblies. Nanoporous Mn(2)O(3) was obtained by thermal treatment of MnCO(3) at 600 degrees C in air. The shape of MnCO(3) was sustained after thermal transformation to form nanoporous Mn(2)O(3). The products were characterized by X-ray powder diffraction, transmission electron microscopy, selected-area electron diffraction, field emission scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetric analysis.
Yang
Li-Xia
LX
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China.
Zhu
Ying-Jie
YJ
Tong
Hua
H
Wang
Wei-Wei
WW