期刊
CARBON
卷 188, 期 -, 页码 265-275出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.12.029
关键词
MXene; Natural materials; Salt resistance; High-efficiency; Solar desalination
资金
- National Natural Science Foundation of China [51973100]
- China Postdoctoral Science Foundation [2020M682125]
- National Key Research Development Project [2019YFC0121402]
- Qingdao University State Key Laboratory of Bio-Fibers and Eco-Textiles [RZ2000003334]
A low-cost, high-efficient solar evaporator derived from waste biomass was constructed with a Janus structure in this study, showing effective solar energy driven water evaporation for seawater desalination. The multifunctional photothermal sponge has a hydrophobic top layer and a hydrophilic bottom layer to prevent salt accumulation, ensuring high efficiency and stable water vapor output. The evaporator also exhibited excellent antibacterial property and potential for use in large-scale wastewater treatment and clean water generation.
Effective use of solar energy to produce steam for solving the problem of global shortage of fresh water is considered to be a promising technology. In this work, we reported a low-cost, high-efficient, waste biomass-derived solar evaporator with Janus structure was readily constructed from porous pomelo peel (PP). This multifunctional photothermal sponge has a hydrophobic top layer and a hydrophilic bottom layer to prevent the accumulation of salt on the surface of the evaporator, ensuring high efficiency and stable water vapor output. After hydrophobic modification of one side of freeze-dried PP, MXene was sprayed on the Janus PP (JPP), the interfacial solar energy driven water evaporation can be effectively realized for seawater desalination. The evaporation rate and solar thermal conversion efficiency of JPP@MXene (JPP@M) under simulated sunlight irradiation with one sun (1 kW m(-2)) were 1.48 kg m(-2).h(-1) and 92.3% respectively. Under simulated sunlight irradiation of 1 sun, a high efficiency evaporation performance could be maintained after 50 cycles. In addition, JPP@M could be used to effectively reduce the viscosity of heavy crude oil through solar-assisted heating, resulting in effective purification. Moreover, JPP@M exhibited excellent antibacterial property, which is more important for biomass samples. This cost-efficient, sustainable and eco-friendly photothermic sponge is expected to be used for large-scale wastewater treatment and clean water generation. (C) 2021 Published by Elsevier Ltd.
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