Fabrication of Au/TiO2 nanowires@carbon fiber paper ternary composite for visible-light photocatalytic degradation of gaseous styrene
Fabrication of Au/TiO2 nanowires@carbon fiber paper ternary composite for visible-light photocatalytic degradation of gaseous styrene
复制标题
Au/TiO2纳米线@碳纤维纸三元复合材料的制备用于可见光光催化降解气态苯乙烯
DOI：
10.1016/j.cattod.2016.06.026
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发表时间：
2017-03-01
期刊：
影响因子：
5.3
通讯作者：
Yamashita, Hiromi
中科院分区：
文献类型：
--
作者：
Shi, Jiayuan;Chen, Jiangyao;Yamashita, Hiromi
在这项工作中，采用湿法涂覆、水热生长和光还原相结合的方法，合成了Au纳米颗粒将TiO2纳米线装饰到分级多孔碳纤维纸上（Au/TiO(2)NWs@CFP）三元复合材料。表征表明，CFP 的 3D 网络被金纳米颗粒（直径 1.8 nm）装饰的锐钛矿 TiO2 纳米线均匀封装，直径为 15-30 nm，长度为几微米。 Au/TiO(2)NWs@CFP复合材料的形成经历了以下三个关键步骤：在CFP上形成TiO2岛、在TiO2岛上原位生长TiO2纳米线以及在TiO2纳米线上沉积Au纳米粒子。气态苯乙烯的光催化降解表明Au/TiO(2)NWs@CFP在可见光照射下表现出优异的光活性和光稳定性。这归因于三种组分（TiO2纳米线、CFP和Au纳米颗粒）的协同作用，可以增强可见光吸收强度，减少光生电荷和空穴的复合，并提高对有机污染物的吸附。该策略将为三元复合光催化剂的合成及其在可见光照射下空气净化中的应用提供有效途径。 (C) 2016 Elsevier B.V. 保留所有权利。
In this work, Au nanoparticles decorated TiO2 nanowires onto hierarchically porous carbon fiber paper (Au/TiO(2)NWs@CFP) ternary composite was synthesized using a combining approach of wet coating, hydrothermal growth and photoreduction. Characterization revealed that the 3D network of CFP was homogeneously encapsulated by Au nanoparticles (1.8 nm in diameter) decorated anatase TiO2 NWs with diameter of 15-30 nm and length of several microns. The formation of the Au/TiO(2)NWs@CFP composite undergoes the following three key-steps: formation of TiO2 islands on CFP, in-situ growth of TiO2 NWs on the TiO2 islands and deposition of Au NPs onto TiO2 NWs. Photocatalytic degradation of gaseous styrene showed that Au/TiO(2)NWs@CFP exhibited the excellent photoactivity and photostability under visible light irradiation. It is attributed to the synergistic effect of the three components (TiO2 NWs, CFP and Au nanoparticles), which can enhance visible light absorption intensity, reduce the recombination of photogenerated charges and holes, as well as improve the adsorption of organic pollutants. The present strategy would offer an effective way for the synthesis of ternary composite photocatalyst and its application to air purification under visible light irradiation. (C) 2016 Elsevier B.V. All rights reserved.