A simple one step approach to preparation of gamma-MnOOH multipods and beta-MnO2 nanorods

作者：Jia Yanjin^*; Xu Jian; Zhou Lihui; Liu Honglai; Hu Ying

来源：Materials Letters, 2008, 62(8-9): 1336-1338.

DOI：10.1016/j.matlet.2007.08.041

• gamma-MnOOH multipods
• beta-MnO2 nanorods
• hydrothermal synthesis
• nanomaterials
• crystal growth

Multipod-like gamma-MnOOH and rod-like beta-MnO2 nanocrystals are synthesized by oxidization of manganese sulphate hydrate (MnSO4-H2O) using sodium chlorate (NaClO3) as an oxidizing agent in a simple hydrothermal reaction system in the absence of any templates, catalysts, or organic reagents. The powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to characterize the as-prepared products. Based on the results of XRD and SEM, multipod-like gamma-MnOOH can be transformed into rod-like beta-MnO2 nanocrystals via one step synthetic route by simply increasing the reaction time while other conditions are kept constant. And a possible transfer mechanism via a nucleation-dissolution-anisotropic growth-recrystallization process is presented.

• 出版日期2008-3-31
• 单位华东理工大学; 上海市计量测试技术研究院