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- W2082451844 abstract "Spinel-type ZnAl2O4, γ-Al2O3, and three Al2O3-ZnAl2O4 solid solutions (at ZnO:Al2O3 = 1:2, 1:4, and 1:8) were prepared by controlled hydrolysis of mixed metal alkoxides, followed by calcination of the resulting gels at 773 K. Powder X-ray diffraction confirmed that all samples prepared were single phase cubic materials, with a lattice parameter, ao, gradually changing with composition between the limiting values ao = 0.790 nm (for γ-Al2O3) and ao = 0.809 nm (for ZnAl2O4). The mixed metal oxides were found to have specific surface areas ranging from 126 m2 g−1 for ZnAl2O4 to 288 m2 g−1 for γ-Al2O3, and pore radii of about 1.5–2 nm. IR spectroscopy of CO adsorbed at low temperature gave a main C-O stretching band at 2205–2210 cm−1, which was assigned to surface Al3+ ···CO adducts where coordinatively unsaturated Al3+ ions act as Lewis acid centers." @default.
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- W2082451844 date "1997-02-01" @default.
- W2082451844 modified "2023-10-16" @default.
- W2082451844 title "Preparation and characterization of spinel-type high surface area Al2O3-ZnAl2O4 mixed metal oxides by an alkoxide route" @default.
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- W2082451844 doi "https://doi.org/10.1016/s0927-6513(96)00073-9" @default.
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