基于异形纳米天线的复合光催化材料合成及性能表征

项目名称： 基于异形纳米天线的复合光催化材料合成及性能表征

项目编号： No.21273038

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 黄彩进

作者单位： 福州大学

项目金额： 80万元

中文摘要： 高量子效率、宽光谱响应和高稳定性光催化剂及其作用本质，是当前国际光催化领域的重要课题和前沿。在提高光利用率及拓展光吸收频谱的研究，等离子体型复合光催化材料吸引着众多研究者的关注。等离子体型金属纳米颗粒从纳米光学角度可看做光学纳米天线。纳米天线具有场剧增、场约束以及场定向辐射等基本功能。基于对纳米光学天线的研究进展，通过对纳米天线的构件：金属纳米颗粒的形状进行调控,形状的不规则导致其表面等离子共振的响应频谱增大，从而达到可见光谱响应范围的拓宽及光利用率的提高。尤其对于星状的纳米颗粒天线，其每个端点可看做纳米点光源并且邻近的端点间由于相互作用而造成其间的近场光强度极大剧增。本项目以基于异形（不规则）纳米天线复合光催化材料的设计、合成及光催化效率提高为研究重点，深入地研究该类材料在可见光诱导下，等离子体型金属与等离子体共振所起的作用本质、光吸收性能及光催化反应性能之间的构效关系和调控规律，探索

中文关键词： 表面等离子体共振；光催化剂；金属纳米颗粒；光学纳米天线；BCN

英文摘要： Photocatalysts with high efficiency, broad spectral response and high chemical stability is always a research hotspot and frontier in the field of photocatalysis. Plasmonic photocatalysts attract more and more attention due to their ability of enhancing photocatalytic activity under visible light. Single plasmonic metal(Au,Ag…) nanoparticles can be considered as a simple optical nano-antenna possessing functionalities of field confinement,field enhancement and redirectivity. As a nano-antenna,its plasmonic spectral reponse can be broadened by its shape and morphology which play an important role on the surface plasmon peak and its bandwidth. This can result in enlarging its visible-light absorption spectrum and improving the efficiency of solar photons capture, especially for a nano-antenna with an irregular shape. Furthermore, for an irregularly shaped antenna such as a star-like antenna, the electromagnetic field intensity around its apexes forms light nanosources and inbetween the apexes is dramatically enhanced， which is attributed to the mutual electromagnetic interaction of the apexes. The shape-caused field enhancement holds promise for amplifying the local field intensity of photocatalytic materials and increasing thus quantum efficiency of photocatalysis. This project focuses on the design and synthesis

英文关键词： Surface plasmon resonance；Photocatalysts；Metal nanoparticles；Optical nano-antenna；BCN