UV-light photocatalytic properties of the bismuth lutetium tungstate system Bi2-xLuxWO6 (0 ≤ x ≤ 1)

被引：14
作者：
Ahsaine, Hassan Ait [1 ]
机构：
[1] Mohammed V Univ, Lab Chim Appl Mat, Ctr Mat Sci, Fac Sci, Rabat, Morocco
来源：
MATERIALS LETTERS | 2020年 / 276卷
关键词：
Bismuth tungstate; Lutetium; UV-Light; Photodegradation; HYDROTHERMAL SYNTHESIS; BI2WO6; HETEROJUNCTION; CONSTRUCTION;
D O I：
10.1016/j.matlet.2020.128221
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Bi2-xLuxWO6 (0 <= x <= 1) photocatalysts were prepared by solid-state reaction at 1000 degrees C. The pristine Bi2WO6 (BWO) possesses the best photocatalytic Rhodamine B degradation performance under UV-light illumination. BWO reaches an efficiency of nearly 90% in 160 min, the photocatalytic efficiency decreases with substituting Bi with Lu which is a fact attributable to the specific surfaces which decrease when the composition x increases due to the increasing crystallite sizes (around 2 mm) of the Bi2-xLuxWO6 (BLWO) phases and the Bi1.2Lu0.8WO6 exhibited the lowest efficiency of 37%. Free radical trapping experiments showed that holes and the superoxide ions are the active species which predominate the photocatalytic reaction. (C) 2020 Elsevier B.V. All rights reserved.
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