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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Improving the performance of pervaporation membranes via localized heating through incorporation of silver nanoparticles
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Improving the performance of pervaporation membranes via localized heating through incorporation of silver nanoparticles

机译：通过引入银纳米颗粒进行局部加热来改善全蒸发膜的性能

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摘要

Noble metal nanoparticles (NPs) can efficiently release heat under optical excitation. Applying this principle of plasmonic heating, earlier work on incorporation of gold NPs into hydrophilic or hydrophobic membranes resulted in improved fluxes under laser irradiation without significantly lowering their selectivities. The present study aims at extending the concept of localized heating (plasmonic heating) of membranes to cheaper silver NPs and more energy efficient LED light instead of gold NPs and a laser device. In addition, the application range of the localized heating for membranes is now extended to pervaporation where the evaporation step is expected to benefit from the localized heating. Silver NPs were incorporated into the PDIViS based pervaporation membranes by an in situ method, as confirmed by TEM images and UV-Vis spectra. The influence of the plasmonic heating on pervaporation performance of Ag-PDMS membranes was investigated by applying sweep gas pervaporation coupled to 400 nm LED light irradiation. The results indicate that applying LED light irradiation can significantly improve the pervaporation performance of Ag-PDMS membranes. It was concluded that plasmonic heating is an attractive strategy to enhance the pervaporation membrane performance.
机译：贵金属纳米颗粒（NPs）在光激发下可以有效释放热量。应用等离子加热原理，早期将金纳米颗粒掺入亲水或疏水膜的工作在激光辐照下提高了通量，而没有显着降低其选择性。本研究旨在将膜的局部加热（等离子加热）的概念扩展到更便宜的银NP和更节能的LED光，而不是金NP和激光设备。另外，膜的局部加热的应用范围现在扩展到全蒸发，其中蒸发步骤有望受益于局部加热。如TEM图像和UV-Vis光谱所证实，通过原位方法将银纳米颗粒掺入基于PDIViS的渗透膜中。等离子体加热对Ag-PDMS膜全蒸发性能的影响是通过将吹扫气体全蒸发与400 nm LED光辐射耦合进行研究的。结果表明，施加LED光照射可以显着改善Ag-PDMS膜的全蒸发性能。结论是，等离子体加热是增强全蒸发膜性能的有吸引力的策略。

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