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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.

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Related in: MedlinePlus

(a) Floating double-layered film (top: light-to-heat conversion layer; bottom: supporting layer) with varying wettability; Optical images of hydrophilic leaf of Osmanthus fragrans (b) and hydrophobic leaf of cactus (c); (d) Schematic of preparation of AAO-based AuNP film (AANF); (e) Optical image of AANF; (f) Front view SEM image of AANF. ((a,d) were drawn by Chengyi Song. The images in (b,c) were taken by Chengyi Song).
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f1: (a) Floating double-layered film (top: light-to-heat conversion layer; bottom: supporting layer) with varying wettability; Optical images of hydrophilic leaf of Osmanthus fragrans (b) and hydrophobic leaf of cactus (c); (d) Schematic of preparation of AAO-based AuNP film (AANF); (e) Optical image of AANF; (f) Front view SEM image of AANF. ((a,d) were drawn by Chengyi Song. The images in (b,c) were taken by Chengyi Song).

Mentions: This paper studies the impact of surface chemistry on the evaporation performance of the localized solar-driven evaporation system using anodic aluminum oxide (AAO)-based gold nanoparticle (AuNP) films. Through surface group functionalization and modulation, the surface chemistry of the top light-to-heat conversion layer and the bottom supporting layer were tailored to study the effect (Fig. 1a). The study shows that the surface chemistry of bottom supporting layer plays a more important role in affecting the evaporation performance than that of top light-to-heat conversion layer. This work provides the systematic study of the surface chemistry in modulating the heat localized evaporation and the findings will help further improve the design of such evaporation system.


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) Floating double-layered film (top: light-to-heat conversion layer; bottom: supporting layer) with varying wettability; Optical images of hydrophilic leaf of Osmanthus fragrans (b) and hydrophobic leaf of cactus (c); (d) Schematic of preparation of AAO-based AuNP film (AANF); (e) Optical image of AANF; (f) Front view SEM image of AANF. ((a,d) were drawn by Chengyi Song. The images in (b,c) were taken by Chengyi Song).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1: (a) Floating double-layered film (top: light-to-heat conversion layer; bottom: supporting layer) with varying wettability; Optical images of hydrophilic leaf of Osmanthus fragrans (b) and hydrophobic leaf of cactus (c); (d) Schematic of preparation of AAO-based AuNP film (AANF); (e) Optical image of AANF; (f) Front view SEM image of AANF. ((a,d) were drawn by Chengyi Song. The images in (b,c) were taken by Chengyi Song).
Mentions: This paper studies the impact of surface chemistry on the evaporation performance of the localized solar-driven evaporation system using anodic aluminum oxide (AAO)-based gold nanoparticle (AuNP) films. Through surface group functionalization and modulation, the surface chemistry of the top light-to-heat conversion layer and the bottom supporting layer were tailored to study the effect (Fig. 1a). The study shows that the surface chemistry of bottom supporting layer plays a more important role in affecting the evaporation performance than that of top light-to-heat conversion layer. This work provides the systematic study of the surface chemistry in modulating the heat localized evaporation and the findings will help further improve the design of such evaporation system.

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