Solar-driven enhanced chemical adsorption and interfacial evaporation using porous graphene-based spherical composites

被引:9
|
作者
Kim, Ye Eun [1 ]
Lim, Junwan [1 ]
Lee, Hyunjung [2 ]
Lee, Eunyoung [1 ]
Kim, Dong Yeong [1 ]
Jun, Young-Si [1 ]
Han, Jong Hun [1 ]
Lee, Sang Hyun [1 ]
机构
[1] Chonnam Natl Univ, Sch Chem Engn, 77 Yongbong Ro, Gwangju 61186, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 335 Gwahangno, Daejeon 34141, South Korea
基金
新加坡国家研究基金会;
关键词
Porous; Graphene-based spherical composites; Interfacial evaporation; Chemical adsorption; Solar; AQUEOUS-SOLUTION; WATER; HEAT; DEGRADATION; TEMPERATURE; TECHNOLOGY; NANOSHEETS; ENERGY;
D O I
10.1016/j.chemosphere.2021.133013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Solar-energy-driven water purification is a promising technology for obtaining clean water during the current global climate crisis. Solar absorbers with high light absorption capacity and efficient energy conversion are critical components of solar-driven water evaporation and purification systems. Herein, we demonstrate that porous reduced graphene oxide (rGO)-based composite spheres facilitate efficient water evaporation and effective organic pollutant adsorption from water. Most solar light (>99% for 1 mm thick composites) is absorbed by the porous rGO-based composite spheres floating on water and is subsequently converted into heat, which is efficiently transferred to water at the air-water interface. Evaporation efficiency via energy conversion by the floating sphere composites reaches similar to 74%. The increase in surface temperature of water also contributes to improving the adsorption capacity of the rGO-based composite spheres for organic pollutants. Furthermore, the composites can effectively block ultraviolet radiation, preventing the chemical reaction of water pollutants into harmful components.
引用
收藏
页数:7
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