RETRACTED: Macroporous photothermal bilayer evaporator for highly efficient and self-cleaning solar desalination

Lee, Jaehyeon; Kim, Ki Woong; Park, Sung Ho; Yoon, Gun Young; Kim, Jeongju; Lee, Sang Joon

doi:10.1016/j.nanoen.2020.105130

Cited by 34 publications

(16 citation statements)

References 47 publications

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“…Solar desalination has become one of the most eye-catching technologies in the field of desalination. − Until now, there have been many reports on solar desalination, such as evaporators based on porous hydrogel, aerogel, or plasmonic materials. − These evaporators convert solar energy into thermal energy and promote the evaporation of brine to achieve efficient separation of water and salt. Many researchers have made great efforts to increase the evaporation rate and achieved impressive results in high-speed solar desalination. ,, Nevertheless, the rapid evaporation of brine is usually accompanied by severe salt crystallization on the evaporator surface, which will dramatically reduce the light absorption efficiency of evaporators, leading to the termination of desalination and the collapse of the evaporator (Figure a). It is still challenging for solar desalination to avoid salt crystallization.…”

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confidence: 99%

“…Note that it is more exciting to achieve salt resistance in treating brine with a higher concentration, even in saturated brine. Despite the fact that some evaporators try to work in high-concentration brine, there is still a lack of research on the desalination behavior of saturated brine. , We believe the evaporators which can efficiently work in saturated brine possess the most potent salt resistance and are expected to solve the salt crystallization problem toward practical application of solar desalination.…”

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confidence: 99%

“…Many researchers have made great efforts to increase the evaporation rate and achieved impressive results in high-speed solar desalination. 17,23,24 Nevertheless, the rapid evaporation of brine is usually accompanied by severe salt crystallization on the evaporator surface, which will dramatically reduce the light absorption efficiency of evaporators, leading to the termination of desalination and the collapse of the evaporator (Figure 1a). It is still challenging for solar desalination to avoid salt crystallization.…”

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confidence: 99%

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Reed Leaves Inspired Silica Nanofibrous Aerogels with Parallel-Arranged Vessels for Salt-Resistant Solar Desalination

Dong¹,

Chen³

et al. 2021

ACS Nano

159

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Sufficient and clean freshwater is still out of reach for billions of people around the world. Solar desalination from brine is regarded as one of the most promising proposals to solve this severe crisis. However, most of the reported evaporators to date still suffer from the decreasing evaporation rate caused by salt crystallization accumulated on their surface. Here, inspired by the vascular tissue structure, transpiration, and antifouling function of reed leaves, we design biomimetic hierarchical nanofibrous aerogels with parallel-arranged vessels and hydrophobic surfaces for highly efficient and salt-resistant solar desalination. Foldable vessel walls and flexible silica nanofibers give the reed leaf-inspired nanofiber aerogels (R-NFAs) excellent mechanical properties and enable them to withstand repeated compression. Besides, the R-NFAs can efficiently absorb sunlight (light absorption efficiency: 94.8%) and evaporate the brine to vapor, similar to reed leaves (evaporation rate: 1.25 kg m −2 h −1 under 1 sun). More importantly, enabled by the hydrophobic surfaces and parallel-arranged vessels, the R-NFAs can work stably in high-concentration brine (saturated, 26.3 wt %) under high-intensity light (up to 6 sun), demonstrating potent salt resistance. It is expected that R-NFAs with combined antisalt pore and surface structures will provide a designed concept for salt-resistant solar desalination.

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confidence: 99%

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Reed Leaves Inspired Silica Nanofibrous Aerogels with Parallel-Arranged Vessels for Salt-Resistant Solar Desalination

Dong¹,

Chen³

et al. 2021

ACS Nano

159

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“…The substrate is divided into two parts: the bottom two layers are fixed to prevent the deformation of the substrate, and the rest of the copper atoms are set as the heat source. The liquid argon film consists of 5112 atoms with a density of 1.367 g/cm 3 . The diameter of the copper nanoparticle is 2.6 nm.…”

Section: ■ Simulation System and Methodsmentioning

confidence: 99%

Atomistic Insight into the Effects of Depositional Nanoparticle on Nanoscale Liquid Film Evaporation

Shao

Cao

et al. 2021

Langmuir

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Nanoscale liquid film evaporation plays an essential role in many engineering applications. This study carries out molecular dynamics simulations on the effects of the depositional nanoparticle’s wettability and volume in base fluid on the evaporation process to understand how the depositional nanoparticle affects the evaporation heat transfer. Increasing the nanoparticle’s wettability can enhance the evaporation heat transfer process, and the enhancement effect of the hydrophobic surface is more remarkable than that of the hydrophilic surface. This because the increasing wettability causes more significant solid–liquid interaction. However, the potential energy of argon atoms at the liquid–vapor interface is almost unaffected by wettability. Moreover, when the depositional nanoparticle locates below the free liquid film, increasing the nanoparticle volume has a better heat transfer performance. As the volume increases, the heat transfer through the nanoparticle becomes more obvious, which effectively enhances the heat transfer at the solid–liquid interface and the liquid–vapor interface. The latent heat of phase change at the liquid–vapor interface is almost unchanged so that the evaporation can be enhanced. This research provides an understanding of the effects of depositional nanoparticles on nanoscale evaporation, which can impact several engineering applications, including devices’ cooling and fluid transport.

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“…The average daily efficiency of the DLSW was 71.5% and the productivity of distilled water increased by 215% if hot brackish water was fed at night. Lee et al 8 proposed a super hydrophilic thermally insulated microporous membrane composed of carbonized sucrose and polydimethylsiloxane as an efficient solar evaporator, which reached a purified water production rate of 1.28 kg m −2 h −1 . In their study, solar energy is used as the only driving energy.…”

Section: Introductionmentioning

confidence: 99%

Dome-arrayed chitosan/PVA hydrogel-based solar evaporator for steam generation

Mao

Liu

Tian

et al. 2022

Sci Rep

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Water evaporation systems with solar energy as the primary driving energy have received extensive attention in recent years. This work studies the preparation method and performance of hydrogel evaporators using chitosan and polyvinyl alcohol (PVA) as a framework and carbon nanoparticles (CNPs) as the photothermal material. The evaporation rate of CPC (chitosan/PVA and CNPs) hydrogel obtained reaches 2.28 kg m−2 h−1. Simultaneously, a three-dimensional structure is designed based on the two-dimensional double-layer evaporation system in this study. An evaporator with a tiny-pool structure and a hydrogel with a dome-arrayed structure is designed. These two structures achieve highly efficient evaporation rates of 2.28 kg m−2 h−1 and 3.80 kg m−2 h−1, respectively. These optimized designs improve the evaporation rate of the overall system by ~ 66.7%. The developed evaporation devices provide a promising pathway for developing the double-layer evaporators, which promote the new development of water purification with a solar-driven evaporation system.

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RETRACTED: Macroporous photothermal bilayer evaporator for highly efficient and self-cleaning solar desalination

Cited by 34 publications

References 47 publications

Reed Leaves Inspired Silica Nanofibrous Aerogels with Parallel-Arranged Vessels for Salt-Resistant Solar Desalination

Reed Leaves Inspired Silica Nanofibrous Aerogels with Parallel-Arranged Vessels for Salt-Resistant Solar Desalination

Atomistic Insight into the Effects of Depositional Nanoparticle on Nanoscale Liquid Film Evaporation

Dome-arrayed chitosan/PVA hydrogel-based solar evaporator for steam generation

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