Enhanced photocatalytic activity of Bi2WO6/TiO2 composite coated polyester fabric under visible light irradiation
Enhanced photocatalytic activity of Bi2WO6/TiO2 composite coated polyester fabric under visible light irradiation
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DOI：
10.1016/j.apsusc.2017.11.136
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发表时间：
2018-03-30
影响因子：
6.7
通讯作者：
Guo, Ronghui
中科院分区：
文献类型：
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作者：
Du, Zoufei;Cheng, Cheng;Guo, Ronghui
本研究采用一步水热法制备了一种可见光驱动光催化剂Bi2WO6/TiO2复合材料，并将其涂覆在涤纶织物上。采用x射线光电子能谱（XPS）、扫描电镜（SEM）、透射电镜（TEM）、x射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）比表面积、紫外-可见漫反射光谱、光致发光光谱（PL）对样品进行了系统表征。通过可见光下对罗丹明B （RhB）和亚甲基蓝（MB）的降解，评价了Bi2WO6/TiO2涂层聚酯织物的光催化活性。通过去除红酒污渍，对织物的自洁性能进行了评价。结果表明，不规则形状的Bi2WO6/TiO2复合材料成功地涂覆在聚酯织物上。紫外-可见吸收光谱在可见光区表现出较宽的吸收带，扩大了吸收光谱的范围，有助于提高光催化降解效率。Bi2WO6/TiO2复合涤纶织物的光催化活性与TiO2含量有关。Bi2WO6/15%TiO2包覆涤纶织物对RhB和MB的降解效率分别达到98%和95.1%，远高于纯Bi2WO6和TiO2包覆涤纶织物。此外，Bi2WO6/15%TiO2包覆涤纶织物在连续三次光催化实验中表现出良好的循环稳定性。此外，Bi2WO6/TiO2涂层聚酯织物具有良好的自清洁性能。这项工作可以推广到设计其他复合光催化剂涂层，通过耦合合适的宽和窄带隙半导体来提高织物的活性。(C) 2017 Elsevier B.V.版权所有
In this study, a visible-light-driven photocatalyst Bi2WO6/TiO2 composite was reported using one-step hydrothermal method and then coated on the polyester fabric. The samples were systematically characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area, UV-vis diffuse reflection spectroscopy and photoluminescence spectroscopy (PL). The photocatalytic activity of Bi2WO6/TiO2 coated polyester fabric was evaluated by degradation of Rhodamine B (RhB) and Methylene blue (MB) under visible light irradiation. The self-cleaning property of the fabrics was assessed through removing red wine stain. The results reveal that the Bi2WO6/TiO2 composites with irregular shape are coated on the polyester fabric successfully. The UV-vis absorption spectra show a broad absorption band in the visible region, which extends the scope of absorption spectrum and helps to improve the photocatalytic degradation efficiency. Photocatalytic activities of the Bi2WO6/TiO2 composite polyester fabric are associated with the content of TiO2. Bi2WO6/15%TiO2 coated polyester fabric exhibits the degradation efficiency for RhB and MB up to 98% and 95.1%, respectively, which is much higher than that of pure Bi2WO6 and TiO2 coated polyester fabric. Moreover, Bi2WO6/15%TiO2 coated polyester fabric shows good cycle stability toward continuous three cycles of photocatalytic experiment for dyes degradation. In addition, the Bi2WO6/TiO2 coated polyester fabric shows good self-cleaning property. This work could be extended to design of other composite photocatalyst coating on the fabric for enhancing activity by coupling suitable wide and narrow band-gap semiconductors. (C) 2017 Elsevier B.V. All rights reserved.