标题:Fabrication of three dimensional CeO2 hierarchical structures: Precursor template synthesis, formation mechanism and properties
作者:Wei, Jingjing; Yang, Zhijie; Yang, Yanzhao
作者机构:[Wei, Jingjing; Yang, Zhijie; Yang, Yanzhao] Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Funct Aggregate Mat, Educ Minist, Jinan 250100, Peop 更多
通讯作者:Yang, YZ
通讯作者地址:[Yang, YZ]Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Funct Aggregate Mat, Educ Minist, Jinan 250100, Peoples R China.
来源:CRYSTENGCOMM
出版年:2011
卷:13
期:7
页码:2418-2424
DOI:10.1039/c0ce00635a
摘要:In this paper, three dimensional mesoporous CeO2 hierarchical structures were synthesized through the thermal decomposition of cerium formate precursors, which were prepared by a solvothermal method. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR), and Thermal gravimetric (TG) was applied to characterize the precursors. Urchin-like Ce(HCOO)(3) precursors were prepared using dimethyl sulfoxide (DMSO) and ammonia solution (1 M) as solvent and base source, respectively, while coral-like Ce(HCOO)(3) precursors were prepared using dimethyl formamide (DMF) and NH4HCO3 as solvent and base source, respectively. The formation mechanism of the hierarchical structured precursors was proposed involving a process of anisotropic growth-H2O induced self-assembly-oriented aggregation and disassembly-Ostwald ripening. CeO2 hierarchical structures were obtained by annealing the corresponding Ce(HCOO)(3) precursors at 400 degrees C for 60 min. N-2 adsorption-desorption isotherms indicate that both CeO2 hierarchical structures derived from their Ce(HCOO)(3) precursors display large surface areas and high pore volumes. In addition, the as-prepared CeO2 catalysts with hierarchical structures are highly active for conversion of CO to CO2.
收录类别:SCOPUS;SCIE
WOS核心被引频次:41
Scopus被引频次:41
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952822806&doi=10.1039%2fc0ce00635a&partnerID=40&md5=c4511eea4f5d73951c9e0162e10321e4
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