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In situ generation of carbonized polyaniline nanowires on thermally-treated and electrochemically-etched carbon fiber cloth for high efficient solar seawater desalination
Desalination ( IF 9.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.desal.2019.114303
Kai Wang , Bingbing Huo , Fang Liu , Yiwei Zheng , Minghao Zhang , Liang Cui , Jingquan Liu

Abstract Utilizing solar energy to evaporate water is an environment-friendly and promising approach for various applications such as seawater desalination. Various photothermal materials can be developed for evaporating water, however, there are still some drawbacks such as complicated synthesis processes, weak/narrow absorbance, bulkiness, and low evaporation rate, which severely limit their commercial applications. Herein, we reported the preparation of electrochemically-etched carbon fiber cloth with surface-coated carbonized polyaniline nanowires (ECFC/CPANW) based on thermally-treated pre-oxidized polyacrylonitrile fiber cloth for highly efficient solar steam generation. This ECFC/CPANW composite has the advantages of low thermal conductivity, effective broadband solar absorption, good hydrophilicity and water transfer ability. When ECFC/CPANW and polyurethane foam are bound together as a solar evaporator, ECFC/CPANW achieved the highest vaporization efficiency of up to 93.7% under 1 sun illumination, which is more efficient than those of most materials previously reported. Therefore, this kind of photo-thermal conversion material with low cost, good stability and environmental friendliness could envision promising practical application for water treatment.

中文翻译:

在热处理和电化学蚀刻的碳纤维布上原位生成碳化聚苯胺纳米线,用于高效太阳能海水淡化

摘要 利用太阳能蒸发水是一种环保且有前景的方法,可用于海水淡化等各种应用。各种光热材料可用于蒸发水,但仍存在合成工艺复杂、吸光度弱/窄、体积大、蒸发速率低等缺点,严重限制了其商业应用。在此,我们报道了基于热处理的预氧化聚丙烯腈纤维布制备具有表面涂层碳化聚苯胺纳米线 (ECFC/CPANW) 的电化学蚀刻碳纤维布,用于高效太阳能蒸汽产生。这种ECFC/CPANW复合材料具有低热导率、有效的宽带太阳能吸收、良好的亲水性和传水能力等优点。当 ECFC/CPANW 和聚氨酯泡沫结合在一起作为太阳能蒸发器时,ECFC/CPANW 在 1 次阳光照射下实现了高达 93.7% 的最高蒸发效率,这比之前报道的大多数材料的效率更高。因此,这种成本低、稳定性好、环境友好的光热转换材料有望在水处理中具有广阔的实际应用前景。
更新日期:2020-05-01
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