Abstract
Octahedral layered molecular sieve materials (OL-1) having the birnessite structure have been synthesized using sol-gel preparation methods. The sol obtained by redox reaction between sucrose and KMnO{sub 4} is then used to make films via (a) immersion, (b) spray coating, (c) spin coating, and (d) spatula coating. Crystalline OL-1 thin films have been prepared by methods a-c. Thin homogeneous films are most readily prepared by spray coating. Spin coating leads to noncrystalline and manganese-deficient films. The films have been characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, and scanning Auger microscopy. The microscopy and Auger experiments show that there was no charging, implying these samples are good electrical conductors. The films are free from large amounts of impurity ions and carbonaceous deposits formed during the syntheses. 25 refs., 5 figs., 3 tabs.
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