Exploration of a photo-redox desalination generator

Chen, Fuming; Karthick, R.; Zhang, Qi; Wang, Jian; Liang, Mengjun; Dai, Jinhong; Jiang, Xiaofang; Jiang, Yue

doi:10.1039/c9ta06307b

Cited by 38 publications

(36 citation statements)

References 31 publications

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“…In this case, the combination of CDI and PV technology to conduct electrochemical desalination by solar power has received increasing attention and has gradually been developed into the SED technology (see Table ). − ,− , Analogous to photosupercapacitor and photobattery, − herein, we also divide SED into two categories according to the arrangement of CDI and PV components: (1) integrated device model, referring to a model in which the PV cells and desalination cells are connected by wires, and (2) monolithic device model, referring to an all-in-one device consisting of both photoelectrode and electrochemical desalination electrode (Figure a–c).…”

Section: Solar-powered Desalination Of High-salinity Watermentioning

confidence: 99%

“…For example, Chen et al . used a dye-modified TiO 2 as a photoelectrode to generate photogenerated electrons under solar irradiation and promote a redox reaction in the desalination cell . The three-electrode photoelectrochemical desalination cell has also attracted increasing attention from researchers.…”

Section: Solar-powered Desalination Of High-salinity Watermentioning

confidence: 99%

“…The obtained secondary energy can be subsequently used to promote the utilization of alternative water resources. To date, advanced solar-powered water treatment technologies, such as solar-thermal interface desalination (STID), ,− solar-thermal membrane desalination (STMD), − solar-driven electrochemical desalination (SED), − and solar-thermal atmospheric water harvesting (ST-AWH), − ,− have been rapidly developed. These solar-driven technologies have great potential for the development of next-generation sunlight–energy–water nexus.…”

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confidence: 99%

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Solar-Powered Sustainable Water Production: State-of-the-Art Technologies for Sunlight–Energy–Water Nexus

Sheng

et al. 2021

ACS Nano

311

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Alternative water resources (seawater, brackish water, atmospheric water, sewage, etc.) can be converted into clean freshwater via high-efficiency, energy-saving, and cost-effective methods to cope with the global water crisis. Herein, we provide a comprehensive and systematic overview of various solar-powered technologies for alternative water utilization (i.e., "sunlight−energy−water nexus"), including solar-thermal interface desalination (STID), solarthermal membrane desalination (STMD), solar-driven electrochemical desalination (SED), and solar-thermal atmospheric water harvesting (ST-AWH). Three strategies have been proposed for improving the evaporation rate of STID systems above the theoretical limit and designing allweather or all-day operating STID systems by analyzing the energy transfer of the evaporation and condensation processes caused by solar-thermal conversion. This review also introduces the fundamental principles and current research hotspots of two other solar-driven seawater or brackish water desalination technologies (STMD and SED) in detail. In addition, we also cover ST-AWH and other solar-powered technologies in terms of technology design, materials evolution, device assembly, etc. Finally, we summarize the content of this comprehensive review and discuss the challenges and future outlook of different types of solar-powered alternative water utilization technologies.

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Section: Solar-powered Desalination Of High-salinity Watermentioning

confidence: 99%

Section: Solar-powered Desalination Of High-salinity Watermentioning

confidence: 99%

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confidence: 99%

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Solar-Powered Sustainable Water Production: State-of-the-Art Technologies for Sunlight–Energy–Water Nexus

Sheng

et al. 2021

ACS Nano

311

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“…However, there are still some issues in the system such as chloride oxidation, the pH value changes and the reduced energy efficiency etc. In our recent work, we reported a photo-anode-based continuous desalination unit based on the redox 91 reaction of 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine 1-oxyl (TEMPO) 42 , which consists of 92 TiO2 photoanode modified with LEG4 dye and TEMPO redox electrolyte. The salt removal 93 rate (SRR) is very limited due to the low photocurrent but still serves as an important proof-94 of-concept for the continuous photo-desalination.…”

Section: Introductionmentioning

confidence: 99%

Photocathode-assisted redox flow desalination

et al. 2020

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“…Recently, we demonstrated photoelectrochemical desalination using a two-electrode configuration, and it was found to offer only low salt removal owing to the weak photocurrent generation. [44,45] Based on the concept mentioned above, we have enhanced the photocurrent with a three-electrode configuration by integrating quasi-solidstate dye-sensitized solar cells (q-DSSCs) and a redox-flow desalination device. [46] The two devices were interconnected by platinized graphite paper as an intermediate electrode.…”

Section: Introductionmentioning

confidence: 99%

Achieving High‐Quality Freshwater from a Self‐Sustainable Integrated Solar Redox‐Flow Desalination Device

Karthick

Wei

Chen

et al. 2021

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As predicted by the International Energy Agency, our planet faces an energy and water crisis in the next 20 years. [1] Human demand for energy and water continues to increase, but the amounts produced are insufficient to meet consumption. [2][3][4][5][6] The ocean is a huge water source, and freshwater can be obtained by salt removal from seawater, which can be performed via two major commercial techniques: thermal distillation and membrane processing. [7][8][9][10][11][12][13][14] The thermal-based desalination techniques include multi-stage distillation, multieffect distillation, and vapor compression, all of which consume tremendous amounts of thermal energy. For example, the total energy consumption of a multistage flash evaporation process is in the range of 50-100 kWh m −3 to achieve highquality water production. [8,15] This makes it only suitable for specific areas with abundant thermal energy sources. Membrane-based desalination includes reverse osmosis and electrodialysis processes. [11,[16][17][18] Using these techniques can reduce energy consumption to <10 kWh m −3 with an output water quality with a salt content of <500 ppm. [8,19,20] In this regard, special attention has been paid to energy and water demand by the research community. [21][22][23][24] These issues have led to the development of a new technique in which renewable energy and desalination technologies are externally coupled to minimize energy consumption. [25] In contrast to the above techniques, electrochemical desalination has become a promising and versatile method that offers dual roles of desalination and energy storage simultaneously. [26][27][28][29][30][31][32][33][34] It removes salt ions through electrode-based reactions either by physical adsorption (capacitive deionization or nonfaradaic processes) or chemical reaction processes (battery desalination or faradaic processes). Meanwhile, the photoelectrochemical process technology becomes a crucial part for the environmental remediation, for instance: the process of water splitting by photoelectrochemical method paves a new way to reduce energy consumption. [35][36][37] Similarly, to achieve a zero-energy consumption process, photoelectrochemical desalination technology has recently been introduced. [38,39] In addition, another concept of solar desalination has been extensively studied: solar thermal desalination. In solar thermal Solar-assisted electrochemical desalination has offered a new energy-water nexus technology for sustainable development in recent studies. However, only a few reports have demonstrated insufficient photocurrent, a low salt removal rate, and poor stability. In this study, a high-quality freshwater level of 5-10 ppm (from an initial feed of 10 000 ppm), an enhanced salt removal rate (217.8 µg cm −2 min −1 of NaCl), and improved cycling and long-term stability are achieved by integrating dye-sensitized solar cells (DSSCs) and redox-flow desalination (RFD) under light irradiation without additional electrical energy consumption. The DSSC redox electrolyte ...

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Exploration of a photo-redox desalination generator

Abstract: A photo-redox catalysis desalination cell demonstrated the dual functions of desalination and photo-electricity energy conversion.

Cited by 38 publications

References 31 publications

Solar-Powered Sustainable Water Production: State-of-the-Art Technologies for Sunlight–Energy–Water Nexus

Solar-Powered Sustainable Water Production: State-of-the-Art Technologies for Sunlight–Energy–Water Nexus

Photocathode-assisted redox flow desalination

Achieving High‐Quality Freshwater from a Self‐Sustainable Integrated Solar Redox‐Flow Desalination Device

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