Journal of Chromatography & Separation Techniques
Open Access

Highly selective oxidation of benzyl alcohol to benzaldehyde catalyzed by Zn-Fe2O4@ZnO core-shell nanostructures

International Summit on Current Trends in Mass Spectrometry

July 13-15, 2015 New Orleans, USA

Rahmatollah Rahimi, Mahdi Heidari-Golafzani and MahboubehRabbani

Scientific Tracks Abstracts: J Chromatogr Sep Tech

Abstract :

In this study, ZnO nanoparticles have been immobilized on the surface of Zn-Fe2O4 nanohallow spheres by sol-gel method and the core-shell structure of Zn-Fe2O4@ZnOnanohallow spheres were characterization by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and vibration sample magnetometery (VSM). The SEM images reveal formation of sphere structure. The TEM micrographs confirm that the size of catalyst is about 150 nm and the thickness of ZnO shell is smaller than 30 nm. Results of VSM illustrate that Zn-Fe2O4@ZnOparticles are superparamagnetic.The catalytic activity ofZn-Fe2O4@ZnOnanohallow spheres was investigated for oxidation ofbenzylic alcohols using H2O2 as an oxidant.The resultant Zn-Fe2O4@ZnOnanohallow spheres were highly selective for oxidation of benzyl alcohols to corresponding benzaldehydes. It was found that the asâ??prepared catalyst display the excellent performance, whereby, 100% selectivity ofbenzaldehydewas achieved at close to 92% conversion.

Biography :

Rahmatollah Rahimi has completed his PhD at Howard University (USA). He has been now serving as a full Professor in the Department of Chemistry, Iran University of Science and Technology. He has published about 90 papers in reputed journals.