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

来源：

WATER RESEARCH | 2023年 / 239卷

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

页数：9