三维有序二氧化锰大孔材料的模板技术合成及表征

以单分散SiO2 胶态晶体球形成的三维有序结构为模板 ,利用胶体晶模板技术合成了三维长程有序的二氧化锰大孔材料 .通过X射线粉末衍射 (XRD)和扫描电子显微镜 (SEM)对产物进行了表征 .其中XRD数据显示所得产物为纯四方相二氧化锰 .SEM结果表明 ,所合成的二氧化锰大孔材料孔大小均匀 ,空间排列高度有序 ,很好地复制了SiO2 胶态晶体球的自组装方式 .此外 ,对三维有序二氧化锰大孔材料的合成过程进行了分析 ,研究了前体填充次数对产物孔结构的完整性和有序性的影响 ,还发现产物孔径的收缩存在异常现象 .

Creating Ordered Macroporous MnO2 by Colloidal Crystals Template Methods

Using close-packed colloidal crystals-silica as the template, a novel 3D well-ordered and long-ranged periodic macroporous material MnO_2 has been prepared by colloidal crystals template methods. The prepared product has been characterized by means of X-ray diffraction (XRD) and scanning electron micrography (SEM). The X-ray diffraction displays that the phase of MnO_2 is tetragonal, and the scanning electron micrography shows that MnO_2 replicates the structure of the started template and exhibits 3D long-range ordered honeycomb framework. The process of preparing the 3D order macroporous MnO_2 was discussed. The effect of the infiltration times to the final morphology of MnO_2 was studied and an abnormity existed in the shrinkage of the final outcome.