Continuous flow-based laser-assisted plasmonic heating: A new approach for photothermal energy conversion and utilization
Continuous flow-based laser-assisted plasmonic heating: A new approach for photothermal energy conversion and utilization
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DOI：
10.1016/j.apenergy.2019.04.069
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发表时间：
2019-08-01
期刊：
影响因子：
11.2
通讯作者：
Xuan, Jin
中科院分区：
文献类型：
--
作者：
Belekoukia, Meltiani;Kalamaras, Evangelos;Xuan, Jin
本研究的目的是通过在连续流动条件下进行良好控制的实验来增强我们对等离子体Au/TiO 2纳米颗粒光热性能的理解。在此，使用532 nm激光照射进行修饰在TiO 2纳米颗粒上的Au纳米颗粒的等离子体激元加热实验。研究了Au负载量、纳米颗粒浓度、流速和激光强度等参数对纳米流体光学和光热性质的影响。结果表明，Au的存在显著提高了纳米流体的光热性能。特别地，与TiO 2纳米流体（22.5 ℃）和水基流体（20.5 ℃）相比，Au纳米流体表现出达到高达32 ℃的显著更高的温度，这归因于Au纳米颗粒表面上的局部表面等离子体共振效应。Au/TiO 2纳米流体的连续流动等离子体激元加热的概念，具有相当大的光学和热性能，是一种有前途的方法，在高效的光热应用，如工业化学过程中的热能供应。
The aim of this study is to enhance our understanding on photothermal performance of plasmonic Au/TiO2 nanoparticles by conducting a well-controlled experiment under continuous flow conditions. Herein, plasmonic heating experiments of Au nanoparticles decorated on TiO2 nanoparticles were performed using 532 nm laser irradiation. Different parameters, such as Au loading, concentration of nanoparticles, flow rate and laser intensity that could affect the optical and photothermal properties of the nanofluids were studied. The results revealed that the photothermal performance of the nanofluids was remarkably increased in the presence of Au. Particularly, Au nanofluid exhibits a significant higher temperature achieving up to 32 degrees C compared to that of TiO2 nanofluid (22.5 degrees C) and water-based fluid (20.5 degrees C) which is attributed to the localized surface plasmon resonance effect on the surface of Au nanoparticles. The concept of continuous-flow based plasmonic heating of Au/TiO2 nanofluid, with considerable optical and thermal properties, is a promising approach in efficient photothermal applications such as thermal energy supply in industrial chemical processes.