1. Low-temperature synthesis of metal tungstates nanocrystallites in ethylene glycol
- Author
-
Chen, Di, Shen, Guozhen, Tang, Kaibin, Zheng, Huagui, and Qian, Yitai
- Subjects
- *
NANOSTRUCTURES , *X-ray diffraction , *GLYCOLS , *TRANSMISSION electron microscopy , *CHEMICAL reactions - Abstract
In this paper, we report the low-temperature synthesis of metal tungstate, MWO4 (
M=Ca , Sr, Ba, Cd, Zn, Pb) nanocrystallites. By reaction between metal chloride and sodium tungstate in ethylene glycol at 180 °C for 10 h, well-crystallized tungstate particles were successfully obtained. Characterization by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) shows that the product powders consist of nanosize particles. Photoluminescence measurement reveals that the as-obtained CaWO4, CdWO4, and PbWO4 show excitonic peaks at about 430, 500 and 500 nm, respectively. The solvent and reaction conditions are important in the formation of the products. [Copyright &y& Elsevier]- Published
- 2003
- Full Text
- View/download PDF