Rattan-based solar evaporator with natural hierarchical and gradient pore structure for synergetic salt resistance and stable freshwater generation
文献类型： 外文期刊
作者： Yang, Rilong 1 ; Liu, Fangqingxin 1 ; Xia, Linmin 1 ; Wu, Xiaomei 1 ; Zhang, Xuexia 1 ; Guo, Fei 1 ; Yu, Yan 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350108, Peoples R China
2.Natl Forestry & Grassland Adm, Adm Key Lab Plant Fiber Funct Mat, Fuzhou 350002, Peoples R China
3.Fujian Acad Agr Sci, Agr Engn Inst, Fuzhou 350003, Peoples R China
关键词： Rattan; Solar desalination; Salt resistance; Gradient structure; Biomass
期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：9.136； 五年影响因子：8.258 ）
ISSN： 1383-5866
年卷期： 2022 年 286 卷
页码：
收录情况： SCI
摘要： The solar-driven interface evaporation (SIE) is considered as a potential approach for desalinating seawater and obtaining clean water. However, most reported SIE systems can hardly handle with the accumulating salt crystals. Herein, a new type of SIE device based on surface-carbonized rattan (C-rattan) is presented for high -performance and salt-free desalination. Owing to the hierarchical channels in each vascular bundle and the natural gradient structure of the rattan stem, the C-rattan evaporator can spontaneously generate salinity gradients between and within the vascular bundles that form a synergistic effect to prompt salt exchange and high-salinity solution reflow. In addition to a high water evaporation rate of 1.47 kg m(-2) h(-1) and an efficiency of 90.4% under 1 sun illumination, the C-rattan also presents an outstanding salt resistance ability and an evaporation rate of 1.17 kg m- 2 h(-1) even for the high-salinity brines (20 wt% NaCl solution). Additionally, the C -rattan possesses the self-cleaning ability that enables it to clear off extra added salt during the solar desalination process. Considering its low-cost and sustainable raw materials, simple preparation procedures, long-term salt resistance ability and self-cleaning capacity, the C-rattan-based SIE device holds a great promise for people living in developing regions to obtain drinkable water from seawater or high-salinity brine.
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