Three-dimensional porous photo-thermal fiber felt with salt-resistant property for high efficient solar distillation |
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| Authors: | Jingjing Zhang Xueqing Luo Xiaoxin Zhang Ying Xu Hongbo Xu Jinlong Zuo Dongmei Liu Fuyi Cui Wei Wang |
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| Institution: | 1. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China;2. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150090, China;3. Department of Environmental Engineering, Harbin University of Commerce, Harbin 150076, China;4. School of Ecology and Environment, Zhengzhou University, Zhengzhou 450000, China |
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| Abstract: | The urgent need for fresh water resource is a public issue facing the world. Solar distillation for seawater desalination is a promising freshwater production method. Interfacial solar evaporation systems based on 2D photo-thermal membranes have been widely studied, but salt pollution is one of the main challenges for solar distillation. In order to solve this problem, a hydrophilic three-dimensional (3D) porous photo-thermal fiber felt (PFF) was obtained by one-step method, through a simple polydopamine (PDA) coating method with hydrophobic graphite felt as a substrate. The PFF had a good evaporation rate of 1.48 kg m?2 h-1 and its corresponding light-vapor conversion efficiency reached 87.4%. In addition, the PFF exhibited an excellent salt-resistant ability when applied to photo-thermal evaporation of high-salinity seawater with 10 wt% NaCl, owing to its intrinsic 3D macroporous structure for the migration circulation of salt ions. The development of the PFF offers a new route for the exploration of salt-resistant photo-thermal materials and is promising for the practical application of solar distillation. |
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| Keywords: | Solar distillation Photo-thermal evaporation Solar desalination Salt resistance Solar evaporation |
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