Au/Pt Nanoparticle-Decorated TiO2 Nanofibers with Plasmon-Enhanced Photocatalytic Activities for Solar-to-Fuel Conversion
Au/Pt Nanoparticle-Decorated TiO2 Nanofibers with Plasmon-Enhanced Photocatalytic Activities for Solar-to-Fuel Conversion
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DOI：
10.1021/jp409311x
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发表时间：
2013-11
影响因子：
3.7
通讯作者：
Zhenyi Zhang;Z. Wang;Shaowen Cao;Can Xue
中科院分区：
文献类型：
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作者：
Zhenyi Zhang;Z. Wang;Shaowen Cao;Can Xue
我们提出了通过简单的静电纺丝制备的Au和Pt纳米粒子共修饰的二氧化钛纳米纤维。电子显微镜分析表明，Au和Pt纳米粒子在TiO 2纳米纤维中分散良好，粒径为5-12 nm。本设计的Au/Pt共装饰的二氧化钛纳米纤维导致显着增强的光催化活性的氢气生成和CO2还原。这是由于Pt的电子吸收功能和Au纳米粒子的表面等离子体共振（SPR）的协同作用，显著提高了光激发TiO 2的电荷分离能力。我们的研究表明，通过合理设计复合纳米结构，可以通过SPR效应收获可见光，以增强由紫外光引发的半导体的光催化活性，从而更有效地利用整个太阳光谱进行能量转换。
We present the fabrication of TiO2 nanofibers codecorated with Au and Pt nanoparticles through facile electrospinning. The Au and Pt nanoparticles with sizes of 5–12 nm are well-dispersed in the TiO2 nanofibers as evidenced by electron microscopic analyses. The present design of Au/Pt codecoration in the TiO2 nanofibers leads to remarkably enhanced photocatalytic activities on both hydrogen generation and CO2 reduction. This great enhancement is attributed to the synergy of electron-sink function of Pt and surface plasmon resonance (SPR) of Au nanoparticles, which significantly improves charge separation of photoexcited TiO2. Our studies demonstrate that through rational design of composite nanostructures one can harvest visible light through the SPR effect to enhance the photocatalytic activities of semiconductors initiated by UV-light to more effectively utilize the whole solar spectrum for energy conversion.