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Sonochemical Method (sonochemical + method)
Selected AbstractsSynthesis of Zinc Oxide Nanostructures with Controlled Morphologies Using a Simple Sonochemical MethodJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 12 2007Xi-peng Pu Zinc oxide (ZnO) nanostructures were synthesized by a simple sonochemical method without the assistance of an additional surfactant. The morphologies can simply be controlled only by changing the addition sequence of NH3·H2O. When NH3·H2O was added before or at the beginning of the ultrasonic treatment, a flower-like nanostructure and ellipsoidal particles self-assembled by nanorods were obtained, respectively. The strong visible emission implied high atomic defects. The emission intensity was dependent on the addition sequence of NH3·H2O greatly. [source] Sonochemical Method for the Preparation of Hollow SnO2 MicrospheresCHINESE JOURNAL OF CHEMISTRY, Issue 7 2006Xia Zhang Abstract A simple sonochemical route has been successfully developed to synthesize SnO2 hollow microspheres. The obtained sample is characterized by XRD, TEM, XPS and UV-visible spectrophotometer. The TEM image of the sample at high magnification shows that the shell of the hollow sphere is composed of 3,5 nm SnO2 nanoparticles. A possible formation mechanism of the hollow spheres is briefly discussed. [source] Sonochemical synthesis and characterization of ZnO nanorod/Ag nanoparticle compositesCRYSTAL RESEARCH AND TECHNOLOGY, Issue 11 2009Fei Li Abstract A simple sonochemical route for the synthesis of Ag nanoparticles on ZnO nanorods is reported. Ultrasonic irradiation of a mixture of ZnO nanorods, Ag(NH3)2+, and formaldehyde in an aqueous medium yields ZnO nanorod/Ag nanoparticle composites. The powder X-ray diffraction of the ZnO/Ag composites shows additional diffraction peaks corresponding to the face-center-cubic structured Ag crystalline, apart from the signals from the ZnO nanorods. Scanning electron microscopy and transmission electron microscopy images of the ZnO/Ag composites reveal that the ZnO nanorods are coated with Ag nanoparticles with a mean size of several tens nanometer. The absorption band of ZnO/Ag composites is distinctly broadened and red-shifted, indicating the strong interfacial interaction between ZnO nanorods and Ag nanoparticles. This sonochemical method is simple, mild and readily scaled up, affording a simple way for synthesis of other composites. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Hierachically Nanostructured Mesoporous Spheres of Calcium Silicate Hydrate: Surfactant-Free Sonochemical Synthesis and Drug-Delivery System with Ultrahigh Drug-Loading CapacityADVANCED MATERIALS, Issue 6 2010Jin Wu Ultrahigh drug-loading capacity and the linear relationship between the cumulative amount of released drug and the natural logarithm of release time were discovered for the hierachically nanostructured mesoporous spheres of calcium silicate hydrate (CSH) obtained by a surfactant-free sonochemical method (see figure). During the release of loaded ibuprofen in simulated body fluid, CSH gradually transformed to hydroxyapatite. [source] Synthesis of Zinc Oxide Nanostructures with Controlled Morphologies Using a Simple Sonochemical MethodJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 12 2007Xi-peng Pu Zinc oxide (ZnO) nanostructures were synthesized by a simple sonochemical method without the assistance of an additional surfactant. The morphologies can simply be controlled only by changing the addition sequence of NH3·H2O. When NH3·H2O was added before or at the beginning of the ultrasonic treatment, a flower-like nanostructure and ellipsoidal particles self-assembled by nanorods were obtained, respectively. The strong visible emission implied high atomic defects. The emission intensity was dependent on the addition sequence of NH3·H2O greatly. [source] | ||||||||||