Single-Phase Solid Solution (TiO2)x-(YSZ)1−x Mesoporous Nanoparticles with Catalytic Activity in the Oxidation of Methane
Single-Phase Solid Solution (TiO2)x-(YSZ)1−x Mesoporous Nanoparticles with Catalytic Activity in the Oxidation of Methane
复制标题
DOI：
10.1021/jp105834a
复制
发表时间：
2010-10
影响因子：
3.7
通讯作者：
S. Somacescu;J. Moreno;P. Osiceanu;B. Su;V. Parvulescu
中科院分区：
文献类型：
--
作者：
S. Somacescu;J. Moreno;P. Osiceanu;B. Su;V. Parvulescu
以十六烷基三甲基溴化铵（CTAB）为表面活性剂导向剂和成孔剂，采用水热处理自组装法合成了二氧化锆−氧化钇−二氧化钛三元体系中具有单相固溶体萤石结构的介孔纳米粉体，二氧化钛含量为0~30 mol%。通过X射线衍射（XRD）、拉曼光谱（Raman）、扫描和透射电子显微镜（SEM和TEM）、热重分析（TG-DTG）、N2吸附/解吸等温线（BET）和X射线光电子能谱（XPS）对所得材料进行了表征。合成的介孔纳米颗粒是单相微晶，晶体尺寸和直径在 6 至 12 nm 之间，平均孔径约为 2 nm。所合成的介孔样品在 550 °C 下煅烧后的比表面积仍高达 140 m2/g。所有光谱方法都清楚地证实了 Ti4+ 在后期中的均匀掺入。
Mesoporous nanosized powders with single-phase solid solution fluorite structure in the ternary oxide zirconia−yttria−titania system, with titania contents from 0 to 30 mol %, were synthesized by the self-assembling method associated with hydrothermal treatment using cetyltrimethylammonium bromide (CTAB) as the surfactant-directing agent and pore-forming agent. The resulting materials were characterized by X-ray diffraction (XRD), Raman spectroscopy (Raman), scanning and transmission electron microscopy (SEM and TEM), thermogravimetric analysis (TG-DTG), N2 adsorption/desorption isotherms (BET), and X-ray photoelectron spectroscopy (XPS). The as-synthesized mesoporous nanoparticles are single-phase crystallites with a crystal size and diameter between 6 and 12 nm and mean pore size around 2 nm. The specific surface area of the as-synthesized mesoporous samples after calcination at 550 °C remains as high as 140 m2/g. All spectroscopic methods clearly confirm the homogeneous incorporation of Ti4+ in the lat...