Title of article :
Surfactant-mediated synthesis of metal substituted hexaaluminate from alumina sol
Author/Authors :
Cho، نويسنده , , Sung June and Seo، نويسنده , , Yong Seog and Song، نويسنده , , Kwang Sup and Jeong، نويسنده , , Nam Jo and Kang، نويسنده , , Sung Kyu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Abstract :
Manganese substituted hexaaluminate has been prepared using environmentally benign surfactants such as Triton X-100, under ambient condition with a commercial alumina sol and metal acetate precursors. The surface area of the pure alumina can be controlled to 10–70 m2 g−1 using cetyltrimethylammonium chloride after heating in oxygen flow at 1200°C for 6 h. The crystal structure of the obtained alumina was high purity θ-Al2O3. Incorporation of La and Mn leads to the formation of the high purity manganese substituted hexaaluminate with a surface area of 30–40 m2 g−1 which is also controllable using organic additives such as urea. The catalytic activity of the manganese substituted hexaaluminate was comparable to the sol–gel derived hexaaluminate catalyst from metal alkoxides.
Keywords :
Organic–inorganic composite , Methane combustion , Hexaaluminate catalyst , Alumina sol , Environmentally benign surfactant , ?-Al2O3
Journal title :
Applied Catalysis B: Environmental
Journal title :
Applied Catalysis B: Environmental