20 research outputs found
Influence of hydrogen peroxide in the preparation of nanocrystalline ceria
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 η2-peroxide (O22-) species
Efficient evaluation of the material response of tissues reinforced by statistically oriented fibres
Local developmental state and order in China's urban development during transition
10.1111/j.0309-1317.2004.00527.xInternational Journal of Urban and Regional Research282424-44