One-dimensional visible-light-driven bifunctional photocatalysts based on Bi4Ti3O12 nanofiber frameworks and Bi2XO6 (X = Mo, W) nanosheets
One-dimensional visible-light-driven bifunctional photocatalysts based on Bi4Ti3O12 nanofiber frameworks and Bi2XO6 (X = Mo, W) nanosheets
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基于 Bi4Ti3O12 纳米纤维框架和 Bi2XO6 (X = Mo, W) 纳米片的一维可见光驱动双功能光催化剂
DOI：
10.1016/j.apcatb.2014.06.023
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发表时间：
2014-11-01
影响因子：
22.1
通讯作者：
Zhang, Xitian
中科院分区：
文献类型：
--
作者：
Liu, Ying;Zhang, Mingyi;Zhang, Xitian
氧化铟半导体因其独特的电子结构和层状晶体而成为重要的光催化剂。本文采用静电纺丝和溶剂热相结合的方法，成功地合成了两种基于Bi4Ti3O12纳米纤维骨架和Bi2XO6 （X= Mo，W）纳米片的氧化铟半导体异质结构。高分辨率透射电镜结果表明，在异质结中，Bi4Ti3O12纳米纤维与Bi2MoO6或Bi2WO6纳米片之间形成了紧密的界面。光催化实验表明，在可见光下，Bi4Ti3O12/Bi2XO6 （X = Mo， W）异质结构比裸Bi4Ti3O12和Bi2XO6 （X = Mo， W）具有更强的光催化活性，这主要是由于Bi4Ti3O12/Bi2XO6异质结的光协同作用引起的光诱导界面电荷转移。由于纳米纤维骨架的长径比大，其异质结构可以很容易地通过沉淀回收而不降低光催化活性。此外，这种简单而通用的策略可以提供一种通用的方法来制造其他异质结构的含Bi（III）氧化物，如Bi4Ti3O12/BiVO4和Bi4Ti3O12/BiOCl。(C) 2014 Elsevier B.V.版权所有
Aurivillius oxide semiconductors are important photocatalysts because of their unique electronic structure and layered crystal. In this paper, two kinds of Aurivillius oxide semiconductor heterostructures based on Bi4Ti3O12 nanofiber frameworks and Bi2XO6 (X= Mo,W)nanosheets are successfully synthesized by combining the electrospinning technique and solvothermal method. The high-resolution transmission electron microscopy results reveal that an intimate interface between Bi4Ti3O12 nanofibers and Bi2MoO6 or Bi2WO6 nanosheets forms in the heterojunctions. Photocatalytic tests show that the Bi4Ti3O12/Bi2XO6 (X = Mo, W) heterostructures exhibit enhanced photocatalytic activity than bare Bi4Ti3O12 and Bi2XO6 (X = Mo, W) under visible light, mainly owing to the photoinduced interfacial charge transfer based on the photosynergistic effect of the Bi4Ti3O12/Bi2XO6 heterojunction. The heterostructures can be reclaimed easily by sedimentation without a decrease of the photocatalytic activity due to the large length to diameter ratio of nanofiber frameworks. Moreover, such simple and versatile strategy can provide a general way to fabricate other heterostructures of Bi(III)-containing oxides, such as Bi4Ti3O12/BiVO4 and Bi4Ti3O12/BiOCl. (C) 2014 Elsevier B.V. All rights reserved.