Magnetic resonance study of nanocrystalline 0.10MnO/0.90ZnO

Magnetic properties of nanosize ZnO powders doped with MnO magnetic dopand have been studied. Sample designated as 0.10MnO/0.90ZnO was characterized by XRD that revealed the presence of ZnO and ZnMnO3 phases. An average size of magnetic ZnMnO3 nanocrystallites was 9 nm. Magnetic resonance study has been carried out in the 4-290 K temperature range. The spectrum at each temperature was analyzed in terms of three components. The temperature dependences of resonance field, linewidth and integrated intensity of these components have been determined. Magnetic centers responsible for producing the observed spectra have been proposed.

Influences of Physicochemical Properties of ZnO on the Adsorptive Desulfurization Performance of Ni/ZnO Adsorbent

ZnO nanoparticles with high surface area were synthesized by hydrothermal homogeneous precipitation method, and the influences of physicochemical properties of ZnO materials on the adsorptive desulfurization performance of Ni/ZnO adsorbent were investigated. Activity evaluation showed that the Ni/ZnO adsorbent using nanosize ZnO as support materials had better adsorption performance, and the sulfur adsorption capacity was maximized depending on the surface area and particle size of ZnO materials. The thiophene removal efficiency and the breakthrough capacity (10 ppm level) were found to be 100% and 6.1 (mg of sulfur per g of adsorbent), respectively.

Synthesis of ZnO Nanoparticles Embedded in a Polymeric Matrix; Effect of Curing Temperature

We studied ZnO nanoparticle formation in a polyimide (PI) film. Polyamic acid (PAA) was spin-coated onto Zn thin films and PAA/metal films were cured at various temperatures. Transmission electron microscopy was used to characterize oxide nanoparticles in the polyimide film. Nanosize ZnO particles were formed in the polyimide film regardless of the curing temperature. The size and the density of ZnO particles depended on the curing temperature. Th