NDLI: Room temperature synthesis of a novel $γ-MnO_{2}$hollow structure for aerobic oxidation of benzyl alcohol

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Room temperature synthesis of a novel $γ-MnO_{2}$hollow structure for aerobic oxidation of benzyl alcohol

Content Provider	Scilit
Author	Fu, Xiaobo Feng, Jiyun Wang, Huan Ng, Ka Ming
Copyright Year	2009
Description	Journal: Nanotechnology A novel gamma-MnO(2) hollow structure has been synthesized at room temperature using a simple chemical reaction between MnSO(4) and KMnO(4) in aqueous solution without using any templates, surfactants, catalysts, calcination and hydrothermal processes. The synthesized gamma-MnO(2) hollow structure was characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and BET analysis. It was found that the hollow structure consisting of short gamma-MnO(2) nanorods with diameters of 5-10 nm and lengths of 50-100 nm could form when the MnSO(4)/KMnO(4) mole ratio was equal to or larger than 2.3. The excess amount of Mn(2+) in solution was observed to promote the crystallization of gamma-MnO(2) nanorods and the formation of the gamma-MnO(2) hollow structure. In addition, the evolution of microstructure and morphology of the products obtained with a MnSO(4)/KMnO(4) mole ratio of 2.3 at different reaction times revealed that the hollow structure was formed via an Ostward ripening process. Furthermore, the obtained gamma-MnO(2) hollow structure was found to exhibit a better catalytic performance than conventional gamma-MnO(2) in the aerobic oxidation of benzyl alcohol to benzaldehyde, demonstrating its possible application in alcohol oxidation.
Related Links	http://iopscience.iop.org/0957-4484/20/37/375601/pdf/0957-4484_20_37_375601.pdf
ISSN	09574484
e-ISSN	13616528
DOI	10.1088/0957-4484/20/37/375601
Journal	Nanotechnology
Issue Number	37
Volume Number	20
Language	English
Publisher	IOP Publishing
Publisher Date	2009-08-26
Access Restriction	Open
Subject Keyword	Journal: Nanotechnology Condensed Matter Physics Scanning Electron Microscopy Transmission Electron Microscopy X Ray Diffraction Chemical Reaction
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering

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