Efficient Methylene Blue Removal over Hydrothermally Synthesized Starlike BiVO4
Efficient Methylene Blue Removal over Hydrothermally Synthesized Starlike BiVO4
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DOI：
10.1021/ie801516u
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发表时间：
2009-02-18
影响因子：
4.2
通讯作者：
Xu, Haolan
中科院分区：
文献类型：
--
作者：
Sun, Songmei;Wang, Wenzhong;Xu, Haolan
以乙二胺四乙酸（EDTA）为螯合剂，以水/乙醇为溶剂，采用水热法成功合成了纳米片堆叠的星状BiVO 4产物。发现EDTA与Bi 3+的摩尔比在这种形态的形成中起重要作用。这些星形的BiVO 4样品表现出较高的可见光驱动的光催化效率。在可见光照射下（λ> 420 nm），亚甲基蓝（MB）的降解率在25 min内可达91%，远高于紫外光照射下的降解率。对于固相反应法（块体BiVO 4）和其他水热合成法制备的BiVO 4样品。并进一步探讨了这些样品光催化活性差异的原因。
Nanoplate-stacked starlike BiVO4 products have been successfully synthesized by a hydrothermal method, where a water/ethanol mixture was the solvent and ethylenediamine tetraacetic acid (EDTA) was the chelating agent. The molar ratio of EDTA to Bi3+ was found to play an important role in the formation of this morphology. These starlike BiVO4 samples exhibited a high visible-light-driven photocatalytic efficiency. For the degradation of methylene blue (MB) under visible-light irradiation (lambda > 420 nm), about 91% of the MB was degraded within 25 min. This is much higher than. for BiVO4 samples prepared by solid-state reaction (bulk BiVO4) and other hydrothermal synthesis methods. The reasons for the differences in the photocatalytic activities of these BiVO4 samples were further investigated.