Mesoporous TiO2-CeO2 mixed oxide(m-TiO2-CeO2) were synthesized using n-cetylpyridinium chloride (C16PyCl) as a structure-directing agent under the neutral conditions and room temperature. The synthesized mesoporous sa...Mesoporous TiO2-CeO2 mixed oxide(m-TiO2-CeO2) were synthesized using n-cetylpyridinium chloride (C16PyCl) as a structure-directing agent under the neutral conditions and room temperature. The synthesized mesoporous samples were characterized by FT-IR, XRD, and N2 adsorption BET methods. The incorporation of Ce3+ ions into the channel wall improves the stability of the mesoporous structure obviously. After ruthenium being loaded by the impregnating method, the Ru particle strongly interacts with the mesoporous mixed supports. Although a part of the particles are possible to block the support pores, the catalytic activity of ruthenium supported on the m-TiO2-CeO2 for methanol decomposition to carbon monoxide and hydrogen is significantly higher than that of ruthenium supported on m-TiO2. A synergistic effect between CeO2 and TiO2 was observed for promoting the catalytic properties of Ru.展开更多
Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination ...Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination temperature and nickel-doped on mesoporous TiO_ 2 were discussed.. The samples formed were characterized with XRD, FT-IR , TG, N_ 2 adsorption and desorption and TEM. The results indicated that mesoporous TiO_ 2 had a big pore diameter and a better stability with Brij35 as template, ratio of template to titanium source had a certain effect on the properties of mesoporous TiO_ 2, The dope of Ni ion has increased the specific surface area of the mesoporous titania.展开更多
文摘Mesoporous TiO2-CeO2 mixed oxide(m-TiO2-CeO2) were synthesized using n-cetylpyridinium chloride (C16PyCl) as a structure-directing agent under the neutral conditions and room temperature. The synthesized mesoporous samples were characterized by FT-IR, XRD, and N2 adsorption BET methods. The incorporation of Ce3+ ions into the channel wall improves the stability of the mesoporous structure obviously. After ruthenium being loaded by the impregnating method, the Ru particle strongly interacts with the mesoporous mixed supports. Although a part of the particles are possible to block the support pores, the catalytic activity of ruthenium supported on the m-TiO2-CeO2 for methanol decomposition to carbon monoxide and hydrogen is significantly higher than that of ruthenium supported on m-TiO2. A synergistic effect between CeO2 and TiO2 was observed for promoting the catalytic properties of Ru.
文摘Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination temperature and nickel-doped on mesoporous TiO_ 2 were discussed.. The samples formed were characterized with XRD, FT-IR , TG, N_ 2 adsorption and desorption and TEM. The results indicated that mesoporous TiO_ 2 had a big pore diameter and a better stability with Brij35 as template, ratio of template to titanium source had a certain effect on the properties of mesoporous TiO_ 2, The dope of Ni ion has increased the specific surface area of the mesoporous titania.
