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Electrochemical Synthesis and Characterization of Barium Tungstate Crystallites

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Barium tungstate (BaWO4) crystallites were successfully synthesized at room temperature via an easily-manipulated electrochemical method, using tungsten plates as electrodes and Ba(OH)2 solution as electrolyte. Effects of electric current value and reaction time on the crystallization and development of BaWO4 crystallites were initially studied and characterized by X-ray diffraction (XRD), scanning electron microscopy, and photoluminescent (PL) spectra technique, respectively. Experimental results showed that well-crystallized BaWO4 crystallites with ca. 2 m in diameter could be obtained at 0.5 A and a short reaction time of 10 min. XRD analysis showed that the as-prepared sample was a pure tetragonal phase of BaWO4 with scheelite structure. PL spectra revealed that BaWO4 crystallites displayed a very strong PL peak at 448 nm with the 380 nm excitation wavelength.

Document Type: Research Article


Affiliations: 1: School of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao 266109, China 2: State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

Publication date: June 1, 2009

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