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Preparation of an Excellent Z-type SrWO4@Bi2WO6 Heterojunction Photocatalyst and Its Photocatalytic Performance under Simulated Sunlight
ChemistrySelect ( IF 2.1 ) Pub Date : 2021-09-13 , DOI: 10.1002/slct.202102213
Bobo Guo 1, 2 , Yufen Gu 1, 2
Affiliation  

In this work, a simple chemical co-precipitation method was employed to prepare a series of excellent Z-type SrWO4@Bi2WO6 (SWO@BWO) heterojunction composites, in which SrWO4 was successfully assembled on Bi2WO6 nanosheets. The outstanding separation efficiency of photo-generated carriers (e/h+) originated from synergetic effect of semiconductor heterojunctions under simulated sunlight effectively improved photocatalytic activity, resulting in a more prominent performance for organic dyestuff degradation compared with its counterparts. Based on the photocatalytic degradation of Methylene blue (MB) experiment, coming to a conclusion is that 10wt %SWO@BWO composite (η=92.9 % for 50 min) has the prominent photocatalytic activity. The photocatalytic performance of 10wt %SWO@BWO composite is 6.36 and 2.6 times as high as that of bare SWO and BWO, respectively. This composite also has better degradation performance for Tetracycline Hydrochloride (TC) and Tetrabromobisphenol A (TBBPA). According to the active species capture experiment, .OH are dominant in the degradation process of MB, and role of h+ and .O2 is also indispensable. Our research provides a simple approach for establishing Z-scheme heterojunction photocatalysts with great photocatalytic performance.

中文翻译:

一种优异的Z型SrWO4@Bi2WO6异质结光催化剂的制备及其模拟日光下的光催化性能

在这项工作中,采用简单的化学共沉淀方法制备了一系列优异的Z型SrWO 4 @Bi 2 WO 6 (SWO@BWO)异质结复合材料,其中SrWO 4成功组装在Bi 2 WO 6纳米片上. 出色的光生载流子分离效率 (e /h +)源自半导体异质结在模拟阳光下的协同效应,有效提高了光催化活性,使其对有机染料的降解性能较同类产品更为突出。基于亚甲蓝(MB)光催化降解实验,得出的结论是10wt%SWO@BWO复合材料(η=92.9%,50分钟)具有显着的光催化活性。10wt%SWO@BWO复合材料的光催化性能分别是裸SWO和BWO的6.36倍和2.6倍。该复合材料对盐酸四环素 (TC) 和四溴双酚 A (TBBPA) 也具有更好的降解性能。根据活性物种捕获实验,. OH在MB降解过程中占主导地位,h的作用+. O 2 -也是必不可少的。我们的研究为建立具有良好光催化性能的 Z 型异质结光催化剂提供了一种简单的方法。
更新日期:2021-09-13
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