Z. Tian, Yuan-Gen Yin, S. Suib
May 15, 1997
Citations
1
Influential Citations
45
Citations
Journal
Chemistry of Materials
Abstract
The readily available permanganate, KMnO4, was successfully utilized in the synthesis of manganese oxide octahedral molecular sieve (OMS-1) with the todorokite type structure. The magnesium concentration in the starting materials was systematically varied to study the synthetic chemistry of Mg−OMS-1. The techniques such as powder XRD, ICP, TGA, TPD, and redox titrations were all applied to characterize the as-synthesized Mg−OMS-1 samples. The correlation between the amount of magnesium in the starting materials and the properties of Mg−OMS-1 results in differences in (1) colors, (2) crystalline purity, and (3) thermal stabilities. Magnesium(II) ions are believed to be doped into the framework of the OMS-1 structure, but the major amount of Mg2+ mainly behaves as a template and is located in the tunnels of OMS-1. Two interesting Mg2+ concentration windows have been observed, one for the starting materials and another for the Mg2+ ions in the framework of Mg−OMS-1 which cover the magnesium concentration ran...