Choi, Jinsoon Shin, Chee Burm Suh, Dong Jin 2024-01-20T20:34:13Z 2024-01-20T20:34:13Z 2021-09-03 2009-10 0959-9428 https://pubs.kist.re.kr/handle/201004/132136 Vanadia-alumina composite aerogels were synthesized by a cogelation method using alcoholic solutions of metal chlorides under acidic conditions. The resulting aerogels exhibited high surface areas and narrow pore size distributions in the mesoporous region. The vanadium oxides existing on the surface of the aerogels predominantly developed into polyvanadates in terms of chemical structure following the introduction of V species up to 40 wt.% with 500 degrees C calcination. The intensities of the Raman spectra for the polyvanadates increased with vanadia content, while Raman bands shifted towards lower wavenumbers with decreasing vanadia content due to weak V-O bonds. Homogeneity of the surface vanadates on the aerogels was much higher than that on the impregnated materials, as observed in temperature programmed reduction and NH3 temperature programmed desorption patterns. English ROYAL SOC CHEMISTRY SELECTIVE CATALYTIC-REDUCTION OXIDE CATALYSTS OXIDATIVE DEHYDROGENATION MOLECULAR-STRUCTURE TOLUENE OXIDATION REACTIVITY MODEL SPECTROSCOPY TIO2 V2O5 Polyvanadate dominant vanadia-alumina composite aerogels prepared by a non-alkoxide sol-gel method Article 10.1039/b905435a 1 JOURNAL OF MATERIALS CHEMISTRY, v.19, no.41, pp.7704 - 7709 JOURNAL OF MATERIALS CHEMISTRY 19 41 7704 7709 scie scopus 000270795600019 2-s2.0-70350057294 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article SELECTIVE CATALYTIC-REDUCTION OXIDE CATALYSTS OXIDATIVE DEHYDROGENATION MOLECULAR-STRUCTURE TOLUENE OXIDATION REACTIVITY MODEL SPECTROSCOPY TIO2 V2O5 Aerogel Vanadia Alumina Non-alkoxide Sol-gel