氧化锰团簇粒子在有序多孔氧化锆孔道中的组装及其特殊性能研究

利用醇溶液浸渍法及后续的热处理工艺成功实现了氧化锰团簇粒子在有序多孔氧化锆孔道中的组装，借助XRD，TEM，UV-vis，EPR以及O~2-TPD等分析手段进行样品结构表征及性能分析。研究表明，氧化锰团簇粒子能比较均匀地分散于规则的孔道中；团簇粒子的生长随着热处理温度的提高受到孔道大小的限制；孔道中的氧化锰团簇粒子能显示出与较大尺寸氧化锰粒子完全不同的强顺磁信号，并且还具有优异的表面氧吸附特性。

Study on the special properties of manganese oxide nanoclusters confined in the ordered porous zirconium oxide

Manganese oxide nanoclusters were synthesized within ordered porous ZrO~2 by using wet impregnation technique. X-ray powder diffraction, HRTEM, XPS, UV-vis spectroscopy, Electron paramagnetic resonance (EPR) spectroscopy and O~2-TPD measurement were adopted for the characterization of the synthesized materials. The results showed that the nanoclusters of manganese oxide could be successfully confined and randomly distributed into the pores of ZrO~2. The size of the MnO~2 nanoclusters was better confined by the dimension of the pore channels with increasing the heating temperature. EPR measurement revealed that decreasing of the particles' sizes led to a significant chagne in the magnetic property. The excellent oxygen adsorption properties of the clusters of manganese oxide confined into the pore channels were demonstrated by the O~2-TPD analysis.