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 01.07.2011   Карта сайта     Language По-русски По-английски
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01.07.2011









Oxalic acid mediated synthesis of WO3·H2O nanoplates and self-assembled nanoflowers under mild conditions


Linzhi Lia, Jingzhe Zhaoa, Corresponding Author Contact Information, E-mail The Corresponding Author, E-mail The Corresponding Author, Yi Wangc, Corresponding Author Contact Information, Yunling Lia, b, Dechong Maa, Yan Zhaoa, b, Shengnan Houa and Xinli Haoa





a College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China


b College of Chemistry, Jilin University, Changchun, 130012, PR China


c Department of Regenerative Medicine, School of Pharmaceutical Sciences, Jilin University, Changchun 130023, PR China




Received 12 February 2011;


revised 26 April 2011;


accepted 2 May 2011.


Available online 7 May 2011.












Abstract



Tungsten oxide hydrate (WO3·H2O) nanoplates and flower-like assemblies were successfully synthesized via a simple aqueous method. The effects of reaction parameters in solution on the preparation were studied. Nanoplates and nanoflowers can be selectively prepared by changing the amount of H2C2O4. In-situ assembly of nanoplates to nanoflowers was also proposed for the formation of assembled nanostructures. In addition, the reaction time and temperature have important effects on the sizes of the as-obtained samples. Crystal structure, morphology, and composition of final nanostructures were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Optical properties of the synthesized samples and the growth mechanism were studied by UV–vis detection. Degradation experiments of Rhodamine B (RhB) were also performed on samples of nanoplates and nanoflowers under visible light illumination. Nanoflower sample exhibited preferable photocatalytic property to nanoplate sample.












Graphical abstract



The oxalic acid has a key role for the structure of WO3·H2O evolution from plates to flowers and the dehydration process of WO3·2H2O to WO3·H2O.


Full-size image





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  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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