Novel Synthesis of Thermally Stable, Alumina-modified Titania --Thermal Decomposition of Alkoxides in Organic Solvent--

Masaaki KOHNO, Toshimi FURUSHIMA, Hiroshi KOMINAMI*, Koji KAGAWA and Yoshiya KERA

Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University; Kowakae, Higashiosaka-shi, Osaka 577-8502 Japan
† Technical Research Center, The Kansai Electric Power Co., Inc., Nakoji, Amagasaki-shi 661-0974 Japan

Alumina-modified titania sample (Al-TiO2) in anatase form was synthesized by thermal decomposition of mixtures of alkoxides of titanium and aluminum in toluene at 300 °C. The Al-TiO2 prepared from titanium (IV) isopropoxide (TIP) and aluminum ethoxide (Ti/Al mole ratio 9) transformed into rutile at around 1000 °C, and it possessed a surface area of 48 m2g−1, even after calcination at 800 °C for 1 h. Another Al-TiO2 prepared from TIP and aluminum isopropoxide showed lesser thermal stability (39 m2 g−1 at 800 °C) , suggesting that reactivity of aluminum alkoxides determines the thermal stability of produced Al-TiO2.

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