Influence of hydrogen peroxide in the preparation of nanocrystalline ceria
Influence of hydrogen peroxide in the preparation of nanocrystalline ceria
复制标题
DOI：
10.1021/cm063024z
复制
发表时间：
2007-05-01
影响因子：
8.6
通讯作者：
Miller, P. R.
中科院分区：
文献类型：
--
作者：
Scholes, F. H.;Hughes, A. E.;Miller, P. R.
通过在不同浓度的 H2O2 存在下用 NaOH 处理 Ce(III) 溶液，研究了 H2O2 在纳米晶 CeO2 制备中的影响。然后通过一系列技术检查所得沉淀材料，包括透射电子显微镜 (TEM)、X 射线衍射 (XRD)、热重分析 (TGA)、拉曼光谱和 X 射线光电子能谱 (XPS)。观察到 CeO2 微晶尺寸随着 H2O2 浓度的增加而减小。发现这与含有eta(2)-过氧化物(O-2(2-))物质的无定形材料的形成有关。
The influence of H2O2 in the preparation of nanocrystalline CeO2 has been investigated by treating solutions of Ce(III) with NaOH in the presence of different concentrations of H2O2. The resulting precipitated material was then examined by a range of techniques, including transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). A decrease in CeO2 crystallite size with increasing H2O2 concentration was observed. This was found to be associated with the formation of an amorphous material containing an eta(2)-peroxide (O-2(2-)) species.