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The impact of surface chemistry on the performance of localized solar-driven evaporation system.

Yu S, Zhang Y, Duan H, Liu Y, Quan X, Tao P, Shang W, Wu J, Song C, Deng T - Sci Rep (2015)

Bottom Line: Such newly developed evaporation system is composed of top plasmonic light-to-heat conversion layer and bottom porous supporting layer.Additionally, this work demonstrated that the evaporation rate mainly depends on the wettability of bottom supporting layer rather than that of top light-to-heat conversion layer.The findings in this study not only elucidate the role of surface chemistry of each layer of such double-layered evaporation system, but also provide additional design guidelines for such localized evaporation system in applications including desalination, distillation and power generation.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, P.R. China.

ABSTRACT
This report investigates the influence of surface chemistry (or wettability) on the evaporation performance of free-standing double-layered thin film on the surface of water. Such newly developed evaporation system is composed of top plasmonic light-to-heat conversion layer and bottom porous supporting layer. Under solar light illumination, the induced plasmonic heat will be localized within the film. By modulating the wettability of such evaporation system through the control of surface chemistry, the evaporation rates are differentiated between hydrophilized and hydrophobized anodic aluminum oxide membrane-based double layered thin films. Additionally, this work demonstrated that the evaporation rate mainly depends on the wettability of bottom supporting layer rather than that of top light-to-heat conversion layer. The findings in this study not only elucidate the role of surface chemistry of each layer of such double-layered evaporation system, but also provide additional design guidelines for such localized evaporation system in applications including desalination, distillation and power generation.

No MeSH data available.


Related in: MedlinePlus

(a) Evaporation weight change of HLN-HLA, HBN-HLA, HLA and HBA as a function of time under Xenon lamp with power density of ~14.3 kW/m2; optical images and IR images of HLN-HLA (b) and broken HBN-HBA (c); (d,e) SEM images of HBN-HBA after exposed to Xenon lamp with power density of ~14.3 kW/m2.
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f3: (a) Evaporation weight change of HLN-HLA, HBN-HLA, HLA and HBA as a function of time under Xenon lamp with power density of ~14.3 kW/m2; optical images and IR images of HLN-HLA (b) and broken HBN-HBA (c); (d,e) SEM images of HBN-HBA after exposed to Xenon lamp with power density of ~14.3 kW/m2.

Mentions: Further investigation on AANF’s evaporation performance under strong light intensity was carried out by employing a Fresnel lens (Shenzhen Salens Technology Co., Ltd) to focus the Xenon light upon the surface of AANF (light power density is ~14.3 kW/m2), while other parameters of the setup were kept the same. As shown in Fig. 3a, the evaporation rate reached as fast as ~1.1 mg/s, which was about 6 times higher than their performance under weak light.


The impact of surface chemistry on the performance of localized solar-driven evaporation system.

Yu S, Zhang Y, Duan H, Liu Y, Quan X, Tao P, Shang W, Wu J, Song C, Deng T - Sci Rep (2015)

(a) Evaporation weight change of HLN-HLA, HBN-HLA, HLA and HBA as a function of time under Xenon lamp with power density of ~14.3 kW/m2; optical images and IR images of HLN-HLA (b) and broken HBN-HBA (c); (d,e) SEM images of HBN-HBA after exposed to Xenon lamp with power density of ~14.3 kW/m2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4559801&req=5

f3: (a) Evaporation weight change of HLN-HLA, HBN-HLA, HLA and HBA as a function of time under Xenon lamp with power density of ~14.3 kW/m2; optical images and IR images of HLN-HLA (b) and broken HBN-HBA (c); (d,e) SEM images of HBN-HBA after exposed to Xenon lamp with power density of ~14.3 kW/m2.
Mentions: Further investigation on AANF’s evaporation performance under strong light intensity was carried out by employing a Fresnel lens (Shenzhen Salens Technology Co., Ltd) to focus the Xenon light upon the surface of AANF (light power density is ~14.3 kW/m2), while other parameters of the setup were kept the same. As shown in Fig. 3a, the evaporation rate reached as fast as ~1.1 mg/s, which was about 6 times higher than their performance under weak light.

Bottom Line: Such newly developed evaporation system is composed of top plasmonic light-to-heat conversion layer and bottom porous supporting layer.Additionally, this work demonstrated that the evaporation rate mainly depends on the wettability of bottom supporting layer rather than that of top light-to-heat conversion layer.The findings in this study not only elucidate the role of surface chemistry of each layer of such double-layered evaporation system, but also provide additional design guidelines for such localized evaporation system in applications including desalination, distillation and power generation.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, P.R. China.

ABSTRACT
This report investigates the influence of surface chemistry (or wettability) on the evaporation performance of free-standing double-layered thin film on the surface of water. Such newly developed evaporation system is composed of top plasmonic light-to-heat conversion layer and bottom porous supporting layer. Under solar light illumination, the induced plasmonic heat will be localized within the film. By modulating the wettability of such evaporation system through the control of surface chemistry, the evaporation rates are differentiated between hydrophilized and hydrophobized anodic aluminum oxide membrane-based double layered thin films. Additionally, this work demonstrated that the evaporation rate mainly depends on the wettability of bottom supporting layer rather than that of top light-to-heat conversion layer. The findings in this study not only elucidate the role of surface chemistry of each layer of such double-layered evaporation system, but also provide additional design guidelines for such localized evaporation system in applications including desalination, distillation and power generation.

No MeSH data available.


Related in: MedlinePlus