| Title | Hydrothermal synthesis of Bi2WO6 uniform hierarchical microspheres |
| Authors | 黄新堂 |
| Issue Date | 2007 |
| Publisher | Crystal Growth & Design |
| Keywords | MICROSPHERES SCANNING electron microscopy TRANSMISSION electron microscopy NANOSTRUCTURES |
| Citation | Crystal Growth & Design. Jul2007, Vol. 7 Issue 7, p1350-1355. 6p. |
| Abstract | Bi2WO6uniform hierarchical microspheres were grown on a large scale at 180 °C by a simple hydrothermal method with the help of the surfactant poly(vinyl pyrrolidone) (PVP). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) were used to characterize the product. The result indicated that three-dimensional (3D) Bi2WO6microspheres were constructed layer-by-layer from a large number of two-dimensional (2D) sheets, which were composed of numerous interconnected square nanoplates with a mean side length of 65 nm. Pore-size distribution analysis showed that both mesopores and macropores existed in the 3D microstructures. The formation mechanism was discussed on the basis of the results of time-dependent experiments. It was demonstrated that PVP played a key role in the formation of such hierarchical microspheres. By adjusting the amount of PVP, Bi2WO6with different morphologies can be attained accordingly. UV−vis spectroscopy was further employed to estimate the band gap energy of the hierarchical structures. Our work may shed some light on the design of other well-defined complex nanostructures, and the as-grown architectures may have potential applications. [ABSTRACT FROM AUTHOR] Copyright of Crystal Growth & Design is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Appears in Collections: | 基科部办公室 |
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