Moisture-indicating cellulose aerogels for multiple atmospheric water harvesting cycles driven by solar energy

被引：38

作者：

Sun, Jiaming ^{[1
,2
]}

An, Bang ^{[1
,2
]}

Zhang, Kun ^{[1
,2
]}

Xu, Mingcong ^{[1
,2
]}

Wu, Zhenwei ^{[1
,2
]}

Ma, Chunhui ^{[1
,2
]}

Li, Wei ^{[1
,2
]}

Liu, Shouxin ^{[1
,2
]}

机构：

[1] Minist Educ, Key Lab Biobased Mat Sci & Technol, Harbin, Peoples R China

[2] Northeast Forestry Univ, Engn Res Ctr Adv Wooden Mat, Minist Educ, Harbin 150040, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2021年 / 9卷 / 43期

基金：

中国国家自然科学基金;

关键词：

CARBON; PERFORMANCE; DESICCANT; DEVICE;

D O I：

10.1039/d1ta07498a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Despite the boom in atmospheric water harvesting (AWH) techniques used to deal with the challenge of clean water shortage, few studies focus on hygroscopic materials that can indicate a moisture change in real time. Here, a moisture-indicating hygroscopic aerogel working in a broad range of relative humidities (RHs) and with fast sorption kinetics is designed for solar driven sorption-based AWH by integrating ethanolamine-decorated CoCl2 (E-CoCl2), microfibrillated cellulose (MFC) and LiCl-decorated polypyrrole (Cl-ppy). The specimen can visually indicate the sorption process in real time while harvesting moisture, achieving a flexible response to changes in environmental humidity and solar radiation. Fabricating an open, unordered, interconnected skeleton in E-CoCl2 using MFC can effectively enhance its sorption kinetics and also prevent the leakage of liquefied salt solution. The specimen has water sorption capacities of 0.39-2.05 kg kg(-1) under RH 25-85% within 3.5 h and can quickly desorb within 1.5 h under 1 sun. An AWH device can conduct 3 sorption/desorption cycles within 9 h during one day outdoors and produces 2.81 kg(water) kg(sorbent)(-1). This strategy is a promising approach to enable sustainable water delivery without geographical and hydrological limitations, especially for the landlocked communities and arid areas.

引用

页码：24650 / 24660

页数：11