Cerium-based metal organic frameworks with UiO-66 architecture: synthesis, properties and redox catalytic activity
作者:Martin Lammert、Michael T. Wharmby、Simon Smolders、Bart Bueken、Alexandra Lieb、Kirill A. Lomachenko、Dirk De Vos、Norbert Stock
DOI:10.1039/c5cc02606g
日期:——
A series of nine Ce(iv)-based metal organic frameworks with the UiO-66 structure containing linker molecules of different sizes and functionalities were obtained under mild synthesis conditions and short reaction times.
Crystal Structure and Solution Species of Ce(III) and Ce(IV) Formates: From Mononuclear to Hexanuclear Complexes
作者:Christoph Hennig、Atsushi Ikeda-Ohno、Werner Kraus、Stephan Weiss、Philip Pattison、Hermann Emerich、Paula M. Abdala、Andreas C. Scheinost
DOI:10.1021/ic400999j
日期:2013.10.21
cerium(IV) both form formatecomplexes. However, their species in aqueoussolution and the solid-state structures are surprisingly different. The species in aqueoussolutions were investigated with Ce K-edge EXAFS spectroscopy. Ce(III) formate shows only mononuclear complexes, which is in agreement with the predicted mononuclear species of Ce(HCOO)2+ and Ce(HCOO)2+. In contrast, Ce(IV) formate forms
Highly dispersed metal oxide nanoparticle sols are of great interest in science and engineering because of their broad potential applications in optics, electronics, sensors, catalysis, biomedicines, and even in cosmetics. Here, we report the size-controlled synthesis of cerium oxide nanoparticle sols by a reflux method with poly(vinylpyrrolidone) as a coating agent to afford stable monodispersions of spherical particles with size of 50–120 nm. The size of nanoparticles can be easily controlled by appropriate adjustment of the molecular weight of the added polymer. Colloidal crystals of cerium oxide are also obtained by evaporation of the cerium oxide sol. As cerium oxide has a larger refractive index than silica and polymers typically used for the preparation of colloidal crystals, the present sols are expected to be useful for the fabrication of high-performance photonic crystals.
Facile Preparation of M
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<sup>n</sup>
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<sup>+</sup>
‐Doped (M = Cu, Co, Ni, Mn) Hierarchically Mesoporous CeO
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Nanoparticles with Enhanced Catalytic Activity for CO Oxidation
作者:Jingcai Zhang、Jinxin Guo、Wei Liu、Shuping Wang、Anran Xie、Xiufang Liu、Jun Wang、Yanzhao Yang
DOI:10.1002/ejic.201403078
日期:2015.2
A series of transition-metal-doped (Cu, Co, Ni, Mn) hierarchicallymesoporous CeO2 nanoparticles have been fabricated through a simple solvothermal strategy. The effect of these doping metals on the morphology and the phase transformation of the Ce(HCOO)3 precursor was investigated. The specific order in which the doping metal cations (except Cu2+) are added during the synthesis process has a remarkable