Plant leaves inspired sunlight-driven purifier for high-efficiency clean water production

被引：201

作者：

Geng, Hongya ^{[1
]}

Xu, Qiang ^{[2
,3
]}

Wu, Mingmao ^{[1
]}

Ma, Hongyun ^{[1
]}

Zhang, Panpan ^{[4
]}

Gao, Tiantian ^{[1
]}

Qu, Liangti ^{[1
,2
,3
,4
]}

Ma, Tianbao ^{[2
,3
]}

Li, Chun ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, MOE Key Lab Bioorgan Phosphorus Chem & Chem Biol, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Minist Educ PR China, State Key Lab Tribol, Dept Mech Engn, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Minist Educ PR China, Dept Mech Engn, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China

[4] Beijing Inst Technol, Sch Chem & Chem Engn, Beijing 100081, Peoples R China

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

中国博士后科学基金; 国家重点研发计划;

关键词：

GRAPHENE OXIDE; MOLECULAR-DYNAMICS; SEAWATER DESALINATION; MEMBRANE; ENERGY; POLY(N-ISOPROPYLACRYLAMIDE); GENERATION; HYDROGELS; IONS;

D O I：

10.1038/s41467-019-09535-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Natural vascular plants leaves rely on differences in osmotic pressure, transpiration and guttation to produce tons of clean water, powered by sunlight. Inspired by this, we report a sunlight-driven purifier for high-efficiency water purification and production. This sunlightdriven purifier is characterized by a negative temperature response poly(N-isopropylacrylamide) hydrogel (PN) anchored onto a superhydrophilic melamine foam skeleton, and a layer of PNIPAm modified graphene (PG) filter membrane coated outside. Molecular dynamics simulation and experimental results show that the superhydrophilicity of the relatively rigid melamine skeleton significantly accelerates the swelling/deswelling rate of the PNPG-F purifier. Under one sun, this rational engineered structure offers a collection of 4.2 kg m(-2) h(-1) and an ionic rejection of > 99% for a single PNPG-F from brine feed via the cooperation of transpiration and guttation. We envision that such a high-efficiency sunlight driven system could have great potential applications in diverse water treatments.

引用

页数：10

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