Loofah Sponge-Derived Hygroscopic Photothermal Absorber for All-Weather Atmospheric Water Harvesting

被引：46

作者：

Yao, Wei ^{[1
,2
]}

Zhu, Xiaodong ^{[1
,2
]}

Xu, Zhenglong ^{[1
,2
]}

Davis, Ruth Anaya ^{[3
]}

Liu, Guanglei ^{[1
,2
]}

Zhong, Haibin ^{[1
,2
]}

Lin, Xianglong ^{[1
]}

Dong, Pei ^{[4
]}

Ye, Mingxin ^{[1
]}

Shen, Jianfeng ^{[1
]}

机构：

[1] Fudan Univ, Inst Special Mat & Technol, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[3] Howard Univ, Dept Mech Engn, Washington, DC 20059 USA

[4] George Mason Univ, Dept Mech Engn, Fairfax, VA 22030 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2022年 / 14卷 / 03期

关键词：

loofah; BC/CNT film; biomass material; moisture absorption; solar steam generation; AMBIENT HUMIDITY; COLLECTION; EFFICIENT; HYDROGEL; SYSTEMS;

D O I：

10.1021/acsami.1c20576

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The loofah gourd is like a natural water tank that stores underground water and drains it out after aging, leaving only a three-dimensional network consisting of hollow and interconnected fibers. This phenomenon inspired us to fabricate a solar-energy-powered sorption-based atmospheric water harvesting device using a loofah sponge. Herein, moisture absorption and photothermal conversion strategies are rationally designed to fast release the absorbed water. This is accomplished by filling the hollow and connected loofah fiber with LiCl and replacing the original luffa peel with a bacterial cellulose (BC)/carbon nanotube (CNT) photothermal conversion membrane. As a result, loofah/BC/CNT (LBC)@LiCl presents a high water absorption capacity of 2.65 g g(-1) at 90% relative humidity (RH) and fast water release performance of 1.33 kg m(-2) h(-1) under 1.0 sun. Noticeably, similar to 1.92-2.40 kg LBC@LiCl can produce daily drinking water for adults (2000-2500 mL) in one night outdoors at similar to 66% RH, proving that it is a feasible method to overcome the drinking water shortage of poor and arid areas using cheap and renewable biomass material.

引用

页码：4680 / 4689

页数：10

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