阳光
蒸腾作用
卤水
超亲水性
材料科学
三聚氰胺
化学工程
化学
环境科学
复合材料
生物化学
有机化学
物理
工程类
润湿
光合作用
天文
作者
Hongya Geng,Qian Xu,Mingmao Wu,Hongyun Ma,Panpan Zhang,Tiantian Gao,Liangti Qu,Lei Gao,Chun Li
标识
DOI:10.1038/s41467-019-09535-w
摘要
Abstract 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 sunlight-driven 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.
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