Adjusting Channel Size within PVA-Based Hydrogels via Ice Templating for Enhanced Solar Steam Generation
2020-09-28
发表期刊ACS APPLIED ENERGY MATERIALS (IF:5.4[JCR-2023],5.9[5-Year])
ISSN2574-0962
卷号3期号:9页码:9216-9225
发表状态已发表
DOI10.1021/acsaem.0c01584
摘要

Solar steam generation has attracted interest in recent years as a clean source for power generation and water treatment. To achieve a high rate of steam generation, it is important for the solar evaporator to not only have high photothermal conversion efficiency but also have a large effective surface area for water evaporation. Herein, we report the use of PVA-based composite hydrogels as the solar evaporator, which inner channel sizes were adjusted through an ice-templating method. Although PVA hydrogels have been actively pursued as a promising material for solar steam generation, the influence of inner channel sizes to material performance has not yet been well investigated. Up to this point, the inner channel sizes of most reported PVA-based solar evaporators have been in the range of several to a few tens of micrometers. In this study, we have narrowed the channel size down to submicrometer range by suppressing growth of ice crystals while freezing the hydrogels. Strong capillary force transport of water over long distances. Therefore, even when the hydrogel was molded into a pillar structure with length of several centimeters, water could be rapidly transported from one end to another, allowing effective evaporation at much increased heights compared to hydrogels with larger channel sizes. The increase in surface area for water evaporation led to a steam generation rate of 6.35 kg m(-2) h(-1) per water surface area covered by the evaporator under 1 sun illumination (100 mW cm(-2)), which is significantly higher than previously reported values.

关键词solar steam photothermal conversion poly(vinyl alcohol) hydrogel physical cross-linking MXene composite
收录类别SCI ; SCIE ; EI
资助项目ShanghaiTech University[2017F0201-000-11] ; School of Physical Science and Technology (SPST) of ShanghaiTech University[EM02161943]
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号WOS:000576676900117
出版者AMER CHEMICAL SOC
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/123531
专题物质科学与技术学院_硕士生
物质科学与技术学院_PI研究组_Franklin Jongmyung Kim组
物质科学与技术学院_本科生
物质科学与技术学院_博士生
通讯作者Kim, Franklin
作者单位
1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;
2.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201203, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院
第一作者的第一单位物质科学与技术学院
推荐引用方式
GB/T 7714
Li, Chuang,Fan, Li,Zhu, Runzhi,et al. Adjusting Channel Size within PVA-Based Hydrogels via Ice Templating for Enhanced Solar Steam Generation[J]. ACS APPLIED ENERGY MATERIALS,2020,3(9):9216-9225.
APA Li, Chuang.,Fan, Li.,Zhu, Runzhi.,Li, Xin.,Wen, Piao.,...&Kim, Franklin.(2020).Adjusting Channel Size within PVA-Based Hydrogels via Ice Templating for Enhanced Solar Steam Generation.ACS APPLIED ENERGY MATERIALS,3(9),9216-9225.
MLA Li, Chuang,et al."Adjusting Channel Size within PVA-Based Hydrogels via Ice Templating for Enhanced Solar Steam Generation".ACS APPLIED ENERGY MATERIALS 3.9(2020):9216-9225.
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