nanocrystalline complex oxides have been synthesized by combination of sol–gel auto combustion and ultrasonic irradiation techniques using copper nitrate, zinc nitrate as metallic nitrates and glycine, urea and thiourea as fuels. sol-gel combustion (combination of the chemical sol–gel process and the combustion process) as a proper synthesized technique is used to synthesize zno/cuo nanocomposi...

The composites Au/SiO2, Au/TiO2, Au/Al2O3, ZnO/TiO2, ZnO/Al2O3 and Eu2O3/SiO2, Eu2O3/TiO2 Eu2O3/Al2O3 were prepared using a solid-state method. effect of the polymer precursors was investigated two precursor polymers, Chitosan Poly(styrene-co-4vinylpyridine), (PS-co-4-PVP) in M/MxLy•Chitosan//M’xO’y as well M/MxLy•PS-co-4-PVP//M’xO’y with M’xO’y = SiO2, TiO2 Al2O3. effects on particle size morp...

A number of various commercial technologies are available to remove contaminants from gasification gases, particularly those biomass. However, new cheaper needed meet the stringent requirements in gas cleaning, especially for biomass production. In this paper, we discuss suitability sorbents prepared by us based on oxides or carbonates metals (Al2O3, CaO, CuO, Fe2O3, MgO, MnO, Na2O and ZnO) rem...

In this work, the structural defects and thermal conductivity of CuO, ZnO, CuO/ZnO nanowires have been studied, using molecular dynamics simulation with COMB3 potential. The initial parameters atoms positions were taken from reports bulk materials tenorite wurtzite structures, respectively. Nanowires grown along c-axis, as observed experimentally. results confirm apparition in systems after a f...

Specimen transfer under controlled environment conditions, such as temperature, pressure, and gas composition, is necessary to conduct successive complementary in situ characterization of materials sensitive to ambient conditions. The in situ transfer concept is introduced by linking an environmental transmission electron microscope to an in situ X-ray diffractometer through a dedicated transmi...

In this study, esterification reaction of different carboxylic acids (Acetic acid, Palmitic acid, Oleic acid) with ethanol was investigated by ZnO, Al2O3-ZnO mixed oxide and phosphotungestic acid (10 %wt) immobilized on the Al2O3-ZnO mixed oxide. The heterogeneous catalysts were characterized by XRD, BET, FE-SEM and EDX techniques. Optimum yield was achieved by using 10% HPW/Al2O3-ZnO as the be...