Zhang Wei-Miao, Yan Jun, Su Qin, Han Jiang, Gao Jie-Feng
School of Chemistry and Chemical Engineering, Yangzhou University, No 180, Road Siwangting, Yangzhou, Jiangsu, 225002, China.
School of Chemistry and Chemical Engineering, Yangzhou University, No 180, Road Siwangting, Yangzhou, Jiangsu, 225002, China; State Key Laboratory of Polymer Materials Engineering, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, Sichuan 610065, P. R. China; Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Building 22, Qinyuan, No.2318, Yuhangtang Road, Cangqian Street, Yuhang District, Hangzhou 311121, People's Republic of China.
J Colloid Interface Sci. 2022 Apr 15;612:66-75. doi: 10.1016/j.jcis.2021.12.093. Epub 2021 Dec 16.
Interfacial evaporation has recently received great interest from both academia and industry to harvest fresh water from seawater, due to its low cost, sustainability and high efficiency. However, state-of-the-art solar absorbers usually face several issues such as weak corrosion resistance, salt accumulation and hence poor long-term evaporation stability. Herein, a hydrophobic and porous carbon nanofiber (HPCNF) is prepared by combination of the porogen sublimation and fluorination. The HPCNF possessing a macro/meso porous structure exhibits large contact angles (as high as 145°), strong light absorption and outstanding photo-thermal conversion performance. When the HPCNF is used as the solar absorber, the evaporation rate and efficiency can reach up to 1.43 kg mh and 87.5% under one sunlight irradiation, respectively. More importantly, the outstanding water proof endows the absorber with superior corrosion resistance and salt rejection performance, and hence the interfacial evaporation can maintain a long-term stability and proceed in a variety of complex conditions. The HPCNFs based interfacial evaporation provides a new avenue to the high efficiency solar steam generation.
由于成本低、可持续性强且效率高，界面蒸发最近在学术界和工业界都引起了极大的兴趣，旨在从海水中获取淡水。然而，目前最先进的太阳能吸收器通常面临几个问题，如耐腐蚀性弱、盐积累以及因此导致的长期蒸发稳定性差。在此，通过致孔剂升华和氟化相结合的方法制备了一种疏水性多孔碳纳米纤维（HPCNF）。具有大孔/介孔结构的HPCNF表现出大的接触角（高达145°）、强的光吸收和出色的光热转换性能。当HPCNF用作太阳能吸收器时，在一个太阳光照下，蒸发速率和效率分别可达1.43 kg m⁻¹ h⁻¹和87.5%。更重要的是，出色的防水性赋予了吸收器优异的耐腐蚀性和防盐性能，因此界面蒸发能够保持长期稳定性，并在各种复杂条件下进行。基于HPCNF的界面蒸发为高效太阳能蒸汽产生提供了一条新途径。
