Bioinspired Asymmetric Polypyrrole Membranes with Enhanced Photothermal Conversion for Highly Efficient Solar Evaporation

被引:74
作者
Gao, Can [1 ]
Li, Yimeng [1 ,2 ]
Lan, Lizhen [1 ,2 ]
Wang, Qing [1 ]
Zhou, Buguang [1 ]
Chen, Yue [1 ]
Li, Jiecong [1 ]
Guo, Jiansheng [1 ]
Mao, Jifu [1 ,2 ,3 ]
机构
[1] Donghua Univ, Key Lab Text Sci & Technol, Minist Educ, Shanghai 201620, Peoples R China
[2] Donghua Univ, Key Lab Text Ind Biomed Text Mat & Technol, Shanghai 201620, Peoples R China
[3] Donghua Univ, Shanghai Frontiers Sci Ctr Adv Text, Shanghai 201620, Peoples R China
基金
上海市自然科学基金;
关键词
asymmetric polypyrrole membranes; bioinspired evaporator; omnidirectional photothermal conversion; reduced evaporation enthalpy; solar desalination;
D O I
10.1002/advs.202306833
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Solar-driven interfacial evaporation (SDIE) has attracted great attention by offering a zero-carbon-emission solution for clean water production. The manipulation of the surface structure of the evaporator markedly promotes the enhancement of light capture and the improvement of evaporation performance. Herein, inspired by seedless lotus pod, a flexible pristine polypyrrole (PPy) membrane with macro/micro-bubble and nanotube asymmetric structure is fabricated through template-assisted interfacial polymerization. The macro- and micro-hierarchical structure of the open bubbles enable multiple reflections inner and among the bubble cavities for enhanced light trapping and omnidirectional photothermal conversion. In addition, the multilevel structure (macro/micro/nano) of the asymmetric PPy (PPy-A) membrane induces water evaporation in the form of clusters, leading to a reduction of water evaporation enthalpy. The PPy-A membranes achieve a full-spectrum light absorption of 96.3% and high evaporation rate of 2.03 kg m-2 h-1 under 1 sun. Long-term stable desalination is also verified with PPy-A membranes by applying one-way water channel. This study demonstrates the feasibility of pristine PPy membranes in SDIE applications, providing guidelines for modulation of the evaporator topologies toward high-efficient solar evaporation. A seedless lotus-pod-inspired asymmetric pristine PPy (PPy-A) membrane is fabricated via template-assisted interfacial polymerization for solar-driven interfacial evaporation. The hierarchical macro/micro open bubbles enhance light absorption of PPy-A membrane, facilitating omnidirectional photothermal conversion. The unique multilevel structure of PPy-A membrane induces water evaporation in cluster form, leading to low evaporation enthalpy, achieving highly efficient solar evaporation.image
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页数:11
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