气凝胶
海水淡化
材料科学
太阳能淡化
石墨烯
光热治疗
蒸发
化学工程
聚吡咯
海水
氧化物
纳米技术
复合材料
聚合物
化学
冶金
膜
工程类
地质学
物理
海洋学
热力学
生物化学
聚合
作者
Mengru Zhang,Fan Xu,Wenjie Liu,Yaqi Hou,Liyun Su,Xin Zhang,Ruihua Zhang,Lijun Zhou,Xiaomei Yan,Miao Wang,Xu Hou,Yang Cao
出处
期刊:Nano Research
[Springer Nature]
日期:2022-01-17
卷期号:16 (4): 4219-4224
被引量:34
标识
DOI:10.1007/s12274-021-4041-4
摘要
Solar-driven water evaporation is a sustainable method to purify seawater. Nevertheless, traditional volumetric water-evaporation systems suffer from the poor sunlight absorption and inefficient light-to-thermal conversion. Also, their anti-bacterial and anti-fouling performances are crucial for the practical application. Herein, we introduce reduced graphene oxide (RGO) with broadband absorbance across the entire solar spectrum, and polypyrrole (PPy), an antibacterial polymer with efficient solar absorption and low thermal conductivity, to develop integrated RGO/PPy aerogel as both the solar absorber and evaporator for highly efficient solar-driven steam generation. As a result, the RGO/PPy aerogel shows strong absorption and good photothermal performance, leading to an evaporation rate of 1.44 kg·m−2·h−1 and high salt rejection (up to 99.99%) for real seawater, with photothermal conversion efficiency > 90% under one sun irradiation. The result is attributed to the localized heat at the air—water interface by the RGO/PPy and its porous nature with functional groups that facilitates the water evaporation. Moreover, the RGO/PPy demonstrates excellent durability and antibacterial efficiency close to 100% for 12 h, crucial characteristics for long-term application. Our well-designed RGO/PPy aerogel with efficient water desalination performance and antibacterial property provides a straightforward approach to improve the solar-driven evaporation performance by multifunctional materials integration, and offers a viable route towards practical seawater desalination.
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