Manganese oxide catalyst promoted with sodium and supported on silica exhibits fairly good activity and selectivity towards the synthesis of ethylene from methane at the optimum operating conditions. Methane and oxygen were fed into a tubular fixed bed reactor packed with catalyst under atmospheric pressure. The effects of temperature, residence time and feed composition on conversion, selectiv...

A continuum-based elastic micromechanics model is developed for silica nanoparticle/polyimide composites with various nanoparticle/polyimide interfacial treatments. The model incorporates the molecular structures of the nanoparticle, polyimide, and interfacial regions, which are determined using a molecular modeling method that involves coarse-grained and reversemapping techniques. The micromec...

Single-crystal Gd2O3 films were grown epitaxially on GaAs~100! substrate. From the single-crystal momentum space analysis on four different samples, 185, 45, 25, and 18 Å thick, a Mn2O3 isomorphous cubic structure is identified. The Gd2O3 film aligns its twofold ~110! axis with the fourfold ~100! surface normal of the substrate, while aligning its @001# and @ 1̄10# axes with the @011# and @011̄# ...

Atomic layer deposition method was used to grow thin films consisting of ZrO2 and MnOx layers. All depositions were carried out at 300 oC. Some characteristics the manganese(III)acetylacetonate ozone process investigated, such as crystallinity dependence growth rate on temperature. partly crystalline in their as-deposited state. Zirconium oxide contained cubic tetragonal phases ZrO2, while mang...

Mn2O3 nanoparticles have been synthesized using chemical co-precipitation method. The as were characterized by X-ray diffractometer (XRD), UV-Visible spectrophotometer (UV-Vis) and Fourier Transform Infra-Red (FTIR) results indicate that possessed crystallites having sizes 12.56 nm 11.90 with cubic orthorhombic structures respectively. two samples are named M1 M2. gas response of both the was i...

Dilution of contact, hard sphere-like, nanoparticle-nanoparticle interactions upon mixing plays a key role in explaining nanoparticle dispersion in athermal all-polymer nanocomposites, as illustrated for polystyrene-nanoparticle/linear-polystyrene blends as a model system.