Synthesis and solar photo-thermal conversion of Au, Ag, and Au-Ag blended plasmonic nanoparticles
Synthesis and solar photo-thermal conversion of Au, Ag, and Au-Ag blended plasmonic nanoparticles
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DOI：
10.1016/j.enconman.2016.09.015
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发表时间：
2016-11-01
影响因子：
10.4
通讯作者：
Zhu, Jiaqi
中科院分区：
文献类型：
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作者：
Chen, Meijie;He, Yurong;Zhu, Jiaqi
对Au、Ag及Au-Ag混合纳米粒子的太阳光热转换性能进行了实验研究。实验结果表明，随着Au NP体积分数的增加，温度和光热转换效率均增加。然而，具有较低NP体积分数的纳米流体显示出较高的比吸收率（SAR），因为每个NP的光子吸收是有限的。等离子体Au和Ag纳米流体表现出比半导体ZnO和TiO 2纳米流体更好的光热转换性能。Au-Ag共混纳米颗粒（1.75- 0.15ppm）的光热转换效率为30.97%。这几乎等于Au NP（1.75 ppm）和Ag NP（0.15 ppm）分别的光热转换效率的算术和（30.91%），因为Au和Ag NP分别吸收不同的波段。我们的工作提供了一种很有前途的方法，通过混合不同的NP来匹配太阳光谱强度，而不是增加相同NP的体积分数，来制备用于太阳能光热转换的工作流体。(C)2016爱思唯尔有限公司版权所有
An experimental investigation was performed on the solar photo-thermal conversion performance of Au, Ag and Au-Ag blended Nanoparticles (NPs). The experimental results showed that both the temperature and photo-thermal conversion efficiency increased as the Au NP volume fraction increased. However, nanofluids with lower NP volume fractions showed a higher Specific Absorption Rate (SAR) since the photon-absorption of each NP was limited. Plasmonic Au and Ag nanofluids showed a better photo thermal conversion performance than semiconductor ZnO and TiO2 nanofluids. The photo-thermal conversion efficiency of Au-Ag blended NPs (1.75-0.15 ppm) was 30.97%. This is almost equal to the arithmetic sum (30.91%) of the photo-thermal conversion efficiencies of Au NPs (1.75 ppm) and Ag NPs (0.15 ppm) separately because of the separate absorption of different wavebands by the Au and Ag NPs. Our work provides a promising method for preparing working fluids for solar photo-thermal conversion by mixing different NPs to match the solar spectral intensity instead of increasing the volume fraction of the same NP. (C) 2016 Elsevier Ltd. All rights reserved.