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每周分享1.20

閱讀:679      發布時間:2016-1-20
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今天給大家分享的是20158月份《Original Paperl》上發表的一篇名為:Preparation of flower-like BiOBr-WO3-Bi2WO6 ternary hybrid with enhanced visible-light photocatalytic activity

文章摘要如下:

The flower-like BiOBr-WO3-Bi2WO6 (BOB-WO-BWO) ternary hybrids were designed and synthesized by an effective two-step approach. Specifically, WO3 decroated Bi2WO6 were prepared by one-step hydrothermal method and subsequent BiOBr layer via a cost-effective process. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and UV-vis diffuse reflectance spectroscopy (DRS) etc. The results indicated that WO3 nanoparticles and BiOBr small nanoplates could be dispersed on the surface of flower-like Bi2WO6 and the BiOBr-WO3-Bi2WO6 ternary hybrids with suitable BiOBr content showed higher photocatalytic activity than that of pure Bi2WO6. The enhanced photocatalytic activity of the BiOBr-WO3-Bi2WO6 was attributed to the cascade electrons transfer from Bi2WO6 to BiOBr and then to WO3 through the interfacial potential gradient in the ternary hybrid which prolong the lifetime of photo-generated charges. The photoluminescence and photo-electrochemical measurement have also verified that the suitable band potential of Bi2WO6, WO3 and BiOBr could help to achieve the efficient separation of photo-generated charges in the composite.

該文章中材料表征采用的是美國麥克儀器ASAP 2460

詳情可參考下面鏈接:

http://www.sciencedirect。。com/science/article/pii/S0925838815308331

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