H. Nakabayashi, PREPARATION OF MICROCRYSTALLINE ZRO2 WITH MONOCLINIC STRUCTURE AND ITS STRONG ACID AND BASE SITES, Chemistry Letters, (11), 1996, pp. 945-946
The micro-crystalline ZrO2 with the monoclinic structure was prepared
by the calcination at low temperature of the Zr-hydroxide obtained by
the hydrolysis of Zr-alkoxide. Both the strong acid sires and the stro
ng base sites were observed to be simultaneously generated on the mono
clinic ZrO2 surface.