Antibacterial Janus cellulose/MXene paper with exceptional salt rejection for sustainable and durable solar-driven desalination

被引:8
作者
Ling, Hao [1 ]
Wang, Lei [1 ]
Zhou, Haonan [1 ]
Zhou, Yunfeng [1 ]
Yang, Yang [1 ]
Ge, Wenjiao [1 ]
Wang, Xiaohui [1 ]
机构
[1] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China
基金
中国国家自然科学基金;
关键词
Papers; Janus structure; Solar seawater desalination; Cellulose; MXene; EFFICIENT; ENERGY;
D O I
10.1016/j.jcis.2024.06.248
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
The scarcity of freshwater resources and increasing demand for drinking water have driven the development of durable and sustainable desalination technologies. Although MXene composites have shown promise due to their excellent photothermal conversion and high thermal conductivity, their high hydrophilicity often leads to salt precipitation and low durability. In this study, we present a novel Cellulose (CF)/MXene paper with a Janus hydrophobic/hydrophilic configuration for long-term and efficient solar-driven desalination. The paper features a dual-layer structure, with the upper hydrophobic layer composed of CF/MXene paper exhibiting convexness to serve as a photothermal layer with exceptional salt rejection properties. Simultaneously, the bottom porous layer made of CF acts as an efficient thermal insulation. This unique design effectively minimizes heat loss and facilitates efficient water transportation. The Janus CF/MXene paper demonstrates a high evaporation rate of 1.11 kg m- 2h- 1 and solar thermal conversion efficiency of 82.52 % under 1 sun irradiation. Importantly, even after 2500 h of operation in a simulated seawater environment, the paper maintains a stable evaporation rate without significant salt deposition and biodegradation due to an antibacterial rate exceeding 90 %. These findings highlight the potential of the Janus CF/MXene paper for scalable manufacturing and practical applications in solar-driven desalination.
引用
收藏
页码:515 / 525
页数:11
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