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- W2095200034 abstract "Abstract Mixed titanium (IV) and zirconium (IV) alkoxides were co-hydrolyzed either at room temperature or at 140 °C in the presence of ammonium-containing catalysts such as hydroxide, carbonate, chloride or nitrate. Mesoporous aggregates of Zr-doped (5 mol%) titania have been obtained at 140 °C and in the presence of catalyzing NH 4 OH or NH 4 Cl, respectively, whereas only microporous products resulted in performing the remaining treatments. By calcination at 400 °C the microporosity of the products drastically was reduced while their mesoporosity was preserved, contemporaneously the crystallization of anatase-type TiO 2 was favoured. The formation mechanism of mesopores in the absence of a templating agent is a consequence of a thermal interconnection of the primary particles with packed inter-particle spaces responsible of the mesoporosity. Such formation is discussed in terms of nature of catalyzing agent, alcoholic media, temperature and treatment time of hydrolysis." @default.
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- W2095200034 date "2010-07-01" @default.
- W2095200034 modified "2023-09-27" @default.
- W2095200034 title "Mesoporous aggregates of ZrO2-doped (5 mol%) titania by interconnection of primary nano-particles" @default.
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- W2095200034 doi "https://doi.org/10.1016/j.micromeso.2010.02.020" @default.
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