Bioinspired Asymmetric Polypyrrole Membranes with Enhanced Photothermal Conversion for Highly Efficient Solar Evaporation
-
Published:2023-12-03
Issue:
Volume:
Page:
-
ISSN:2198-3844
-
Container-title:Advanced Science
-
language:en
-
Short-container-title:Advanced Science
Author:
Gao Can1,
Li Yimeng12,
Lan Lizhen12,
Wang Qing1,
Zhou Buguang1,
Chen Yue1,
Li Jiecong1,
Guo Jiansheng1ORCID,
Mao Jifu123
Affiliation:
1. Key Laboratory of Textile Science and Technology Ministry of Education Donghua University Shanghai 201620 China
2. Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai 201620 China
3. Shanghai Frontiers Science Center of Advanced Textiles Donghua University Shanghai 201620 China
Abstract
AbstractSolar‐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.
Funder
Fundamental Research Funds for the Central Universities
Natural Science Foundation of Shanghai Municipality
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)