Polyacid doping-enabled efficient solar evaporation of polypyrrole hydrogel
Polyacid doping-enabled efficient solar evaporation of polypyrrole hydrogel
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聚酸掺杂实现聚吡咯水凝胶的高效太阳能蒸发
DOI：
10.1021/acsanm.0c02765
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发表时间：
2021-06
期刊：
影响因子：
9.9
通讯作者：
Xia Youyi
中科院分区：
文献类型：
--
作者：
Wu Yuzhen;Shen Lei;Zhang Changxing;Gao Hong;Chen Jun;Jin Ling;Lin Peng;Zhang Hexin;Xia Youyi
利用太阳能蒸馏技术进行水净化被认为是一种可持续的淡水生产方法。因此，开发高效的太阳能吸收系统已经获得了相当大的关注。在这项研究中，我们报告了一个氧化石墨烯（GO）还原氧化石墨烯（rGO）Janus膜通过激光处理的GO膜的保护下的水凝胶。使用激光功率将GO膜的一侧还原为rGO，而GO膜的另一侧由水凝胶保护以避免激光烧蚀并保持膜的完整性和原始状态。GO层的亲水性和rGO层的相对疏水性彼此互补并协同工作。亲水性GO侧提供了良好的水传输通道并表现出良好的阻挡盐渗透，而具有3D粗糙表面的相对疏水性rGO侧通过增加阳光吸收来增加蒸发速率。因此，所得GO-rGO Janus膜在1个太阳照射下表现出91.4%的高太阳能-蒸汽效率，这高于先前报道的大多数石墨烯基光热转换材料的太阳能-蒸汽效率。同时，发现GO-rGO Janus膜是高效和耐盐的，并且可用于各种类型的水的净化，包括海水和过饱和盐水。因此，制备的GO-rGO Janus膜有助于太阳能的收集，本研究为开发高效的Janus膜用于淡水生产提供了有益的尝试。
Water purification by solar distillation technique is considered a sustainable method of producing fresh water. Thus, the development of a highly efficient solar absorber system has gained considerable attention. In this study, we report a graphene oxide (GO)–reduced graphene oxide (rGO) Janus membrane produced via laser treatment of the GO membrane under the protection of hydrogel. One side of the GO membrane is reduced to rGO using laser power, while the other side of the GO membrane is protected by hydrogel to avoid laser ablation and retain the integrity and original state of the membrane. The hydrophilicity of the GO layer and the relative hydrophobicity of the rGO layer complement each other and work synergistically. The hydrophilic GO side provides a good water transmission channel and exhibits good block salt penetration, whereas the relatively hydrophobic rGO side with a 3D rough surface increases the evaporation rate by increasing the sunlight absorption. Therefore, the resultant GO–rGO Janus membrane under 1 sun illumination exhibits a high solar-to-vapor efficiency of 91.4%, which is higher than that of most graphene-based photothermal conversion materials previously reported. Simultaneously, it is found that the GO–rGO Janus membrane is highly efficient and salt resistant and can be utilized for the purification of various types of water, including seawater and supersaturated brine. Therefore, the GO–rGO Janus membrane made may help to collect solar energy, and this research can be considered as a useful attempt to develop an efficient Janus membrane for producing fresh water.
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影响因子：
16.6
作者：
Bae K;Kang G;Cho SK;Park W;Kim K;Padilla WJ
通讯作者：
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影响因子：
38.3
作者：
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影响因子：
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影响因子：
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作者：
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29.4
作者：
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