Double-photoelectrode redox desalination of seawater

被引:10
|
作者
Liang, Mengjun [1 ,2 ,3 ]
Zhang, Jiancong [2 ]
Chen, Xuncai [2 ,4 ]
Zaw, Mono [5 ]
Oo, Than Zaw [5 ]
Lwin, Nyein Wint [5 ]
Aung, Su Htike [5 ]
Chen, Yuan [6 ]
Chen, Fuming [1 ,2 ]
机构
[1] South China Normal Univ, Sch Elect & Informat Engn, Foshan 528225, Peoples R China
[2] South China Normal Univ, Sch Phys & Telecommun Engn, Guangzhou 510006, Peoples R China
[3] Hubei Univ Technol, Hubei Key Lab High Efficiency Utilizat Solar Energ, Wuhan 430068, Peoples R China
[4] Southern Med Univ, Sch Forens Med, Guangzhou Key Lab Forens Multiom Precis Identifica, Guangzhou 510515, Peoples R China
[5] Univ Mandalay, Dept Phys, Mat Res Lab, Mandalay 05032, Myanmar
[6] Univ Sydney, Sch Chem & Biomol Engn, Darlington, NSW 2006, Australia
基金
澳大利亚研究理事会;
关键词
Redox flow desalination; Dye-sensitized solar cell; TiO; 2; photoanode; NiO photocathode; SENSITIZED SOLAR-CELLS; PHOTOCATALYTIC FUEL-CELL; WASTE-WATER TREATMENT; ENERGY-CONVERSION; PHOTOCATHODE; PERFORMANCE; PHOTOANODE; CHALLENGES; ELECTRICITY; EFFICIENCY;
D O I
10.1016/j.watres.2023.120051
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
High energy consumption and low salt removal rate are key barriers to realizing practical electrochemical seawater desalination processes. Here, we demonstrate a novel solar-driven redox flow desalination device with double photoelectrodes to achieve efficient desalination without electrical energy consumption. The device consists of three parts: one photoanode unit, one photocathode unit, and one redox flow desalination unit sandwiched between the two photoelectrode units. The photoelectrode units include a TiO2 photoanode and a NiO photocathode sensitized with N719 dye, triiodide/iodide redox electrolyte, and graphite paper integrated electrodes decorated with 3,4-ethylene-dioxythiophene. Two salt feeds are located between two ferro/ferricyanide redox flow chambers. Under light illumination, high-quality freshwater is obtained from brackish water containing different concentrations of NaCl from 1000 to 12,000 ppm with a high NaCl removal rate. The device can work in multiple desalination cycles without significant performance declines. Furthermore, natural seawater with an ionic conductivity of 53.45 mS cm-1 is desalinated to freshwater. This new design opens opportunities to realize efficient and practical solar-driven desalination processes.
引用
收藏
页数:9
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