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.

Key words: MANGANESE OXIDE, ZIRCONIUM OXIDE, ASSEMBLING, X-RAY DIFFRACTION ANALYSIS, TRANSMISSION ELECTRON MICROSCOPY, ULTRAVIOLET SPECTROPHOTOMETRY, PARAMAGNETIC RESONANCE, ADSORPTION