Gold nanoparticles embedded in Ta2O5/Ta3N5 as active visible-light plasmonic photocatalysts for solar hydrogen evolution
Gold nanoparticles embedded in Ta2O5/Ta3N5 as active visible-light plasmonic photocatalysts for solar hydrogen evolution
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DOI：
10.1039/c4ta02991g
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发表时间：
2014-08
影响因子：
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通讯作者：
Luo Yujing;L. Xiaoming;Xinghua Tang;Yan Luo;Qianyao Zeng;Xiaolei Deng;Shaolei Ding;Sun Yiqun-Sun-Yiq
中科院分区：
文献类型：
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作者：
Luo Yujing;L. Xiaoming;Xinghua Tang;Yan Luo;Qianyao Zeng;Xiaolei Deng;Shaolei Ding;Sun Yiqun-Sun-Yiq
在这里，我们通过将金纳米粒子嵌入 Ta2O5 主体晶格中，展示了纳米 Au/Ta2O5 复合材料作为可见光响应等离子体光催化剂从水中析氢的新光催化活性。纳米 Au/Ta2O5 复合材料样品是通过简单的 Pechini 型溶胶-凝胶工艺制备的。在 1123 K 的氨流中进一步氮化纳米 Au/Ta2O5 复合材料样品，得到纳米 Au/Ta3N5 复合材料样品。与空白 Ta3N5 纳米粒子相比，所获得的纳米 Au/Ta3N5 复合材料在可见光区域表现出显着增强的从水中析氢的光催化活性。紫外-可见漫反射光谱和光催化活性测量表明，Au纳米颗粒表面等离子体共振的激发是纳米Au/Ta2O5复合材料新的再生光催化活性的原因，并且显着增强了纳米Au/Ta3N5复合材料在可见光区域析氢的光催化活性，这可能归因于电荷 纳米Au/Ta2O5复合材料中的传输效应以及嵌入Au纳米颗粒的表面等离子体共振引起的纳米Au/Ta3N5复合材料中电荷转移和近场电磁效应的协同效应。目前的研究可以为光催化、光伏和其他光电器件的等离子体金属/半导体复合系统的设计提供新的范例。
Here, we demonstrate a new recreating photocatalytic activity of a Nano Au/Ta2O5 composite for hydrogen evolution from water as a visible-light-responsive plasmonic photocatalyst by embedding Au nanoparticles in a Ta2O5 host lattice. The Nano Au/Ta2O5 composite samples were prepared through a simple Pechini-type sol–gel process. Further nitridating Nano Au/Ta2O5 composite samples in ammonia flow at 1123 K yielded Nano Au/Ta3N5 composite samples. The obtained Nano Au/Ta3N5 composite exhibited a significantly enhanced photocatalytic activity in the visible region for hydrogen evolution from water compared with blank Ta3N5 nanoparticles. UV-visible diffuse reflectance spectra and photocatalytic activity measurements indicated that the excitation of surface plasmon resonance of Au nanoparticles is responsible for the new recreating photocatalytic activity of the Nano Au/Ta2O5 composite and significantly enhanced photocatalytic activity of the Nano Au/Ta3N5 composite for hydrogen evolution in the visible region, which might be ascribed to the charge transfer effect in Nano Au/Ta2O5 composite and the synergetic effect of charge transfer and near-field electromagnetic effect in Nano Au/Ta3N5 composite induced by surface plasmon resonance of embedded Au nanoparticles. The current study could provide a new paradigm for designing plasmonic metal/semiconductor composite systems for photocatalytic, photovoltaic and other optoelectronic devices.