Synthesis, characterization, and ion-exchange properties of zinc and magnesium manganese oxides confined within MCM-41 channels

被引:66
作者
Aronson, BJ [1 ]
Blanford, CF [1 ]
Stein, A [1 ]
机构
[1] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 03期
关键词
D O I
10.1021/jp9920343
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Zinc- and magnesium-manganese oxide particles have been grown in the pores of MCM-41 using a procedure adapted from a mild synthesis for layered manganese oxides. The Mn-modified silicates were analyzed by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), N-2 sorption, infrared (IR) spectroscopy, diffuse reflectance ultraviolet-visible (DRUV-vis) spectroscopy, electron spin resonance (ESR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA), and the ion-exchange and electrochemical properties were tested. The occluded manganese oxide consisted of well-dispersed, multivalent particles with a weakly ordered or amorphous structure. Ion-exchange studies determined that the occluded manganese oxide was more accessible to exchanging ions than bulk-layered manganese oxides prepared by a similar synthesis.
引用
收藏
页码:449 / 459
页数:11
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