文献类型：期刊文献

英文题名：Effect of hydrothermal time, pH, morphology of manganese oxides

作者：Zhang, Zhiqing; Mu, Jin

机构：[1]E China Univ Sci & Technol, Dept Chem, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2007

卷号：28

期号：5

起止页码：793

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000247620600017)】；

语种：英文

外文关键词：manganese oxides; hydrothermal treatment; crystal phase; morphology

摘要：gamma-MnOOH nanowires and Mn3O4 nanoparticles were prepared in the hydrothermal process. The effect of hydrothermal time, pH, and alkali on morphology and composition of manganese oxides was investigated. The results of XRD, TEM, and SEM showed that the gamma-MnOOH prepared in shorter hydrothermal time was a mixture of nanocubes and nanowires, while in longer hydrothermal time was pure nanowires. Interestingly, increasing the pH of the reaction system from 8 to 10, the mixture of gamma-MnOOH nanowires and Mn3O4 nanoparticles was obtained. Alkali types also were discussed in directing the reaction and crystallization of manganese oxides. The product was pure gamma-MnOOH when using NaOH in the system, but a mixture of Mn3O4 and gamma-MnOOH was obtained when using NH3 center dot H2O.