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Tillandsia‐Inspired Hygroscopic Photothermal Organogels for Efficient Atmospheric Water Harvesting
Author(s) -
Ni Feng,
Qiu Nianxiang,
Xiao Peng,
Zhang Chang,
Jian Yukun,
Liang Yun,
Xie Weiping,
Yan Luke,
Chen Tao
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202007885
Subject(s) - photothermal therapy , sorption , moisture , materials science , chemical engineering , water content , flexibility (engineering) , chemistry , nanotechnology , adsorption , composite material , organic chemistry , geotechnical engineering , engineering , statistics , mathematics
Tillandsia species with degenerated roots have evolved into hygroscopic leaves that absorb moisture from air. This interesting biological adaptability has inspired us to develop an integrated hygroscopic photothermal organogel (POG) to achieve a solar‐powered atmospheric water harvesting (AWH). The well‐designed hydrophilic co‐polymeric skeleton is fabricated to accommodate hygroscopic glycerin medium, which enables the POG self‐contained property, mechanically flexibility and synergistic enhancement of moisture sorption. The integration of interpenetrated photothermal component of poly‐pyrrole‐dopamine (P‐Py‐DA) can endow the POG an efficient solar‐to‐thermal property for controllable solar‐driven interfacial water releasing. The integrated POG has an equilibrium moisture sorption of 16.01 kg m −2 at the RH of 90 %, and daily water production as high as 2.43 kg m −2 day −1 is achieved in actual outdoor experiments.