Graphene Array-Based Anti-fouling Solar Vapour Gap Membrane Distillation with High Energy Efficiency

Gong, Biyao; Yang, Huachao; Wu, Shenghao; Xiong, Guoping; Yan, Jun; Cen, Kefa; Bo, Zheng; Ostrikov, Kostya Ken

doi:10.1007/s40820-019-0281-1

Cited by 81 publications

(28 citation statements)

References 40 publications

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“…Solar irradiation with representative intensities of 1000 and 700 W m –2 are applied corresponding to the value of standard test and flux of natural sunlight, respectively. [ 5,20,35–41 ]…”

Section: Resultsmentioning

confidence: 99%

High‐Yield and Low‐Cost Solar Water Purification via Hydrogel‐Based Membrane Distillation

Wen

Zhao

et al. 2021

Adv Funct Materials

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As an eco‐friendly means, solar water purification has attracted substantial research interest regarding material design, system engineering, and energy management. However, the low water yield and relatively high cost essentially restrict its practical potential. Here, a hydrogel‐based ultrathin membrane (HUM) is developed to synergistically coordinate facilitated vapor transfer and environmental energy harvesting for solar‐driven membrane distillation. The evaporation front is directly exposed to an airflow, which fundamentally eliminates the temperature polarization induced energy consumption. As such, the humidity of the output flow is significantly increased, and thus the vapor collection ratio rises to over 80% to achieve a high water yield of 2.4 kg m–2 h–1 under one sun without any energy recycling and cooling accessories. The HUM with a raw material cost of $0.36 m–2 offers a competitive potential cost of freshwater production of about $0.3–1.0 m–3. This work demonstrates a promising membrane distillation strategy based on sustainable energy toward both decentralized water purification and large‐scale water treatment.

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Section: Resultsmentioning

confidence: 99%

High‐Yield and Low‐Cost Solar Water Purification via Hydrogel‐Based Membrane Distillation

Wen

Zhao

et al. 2021

Adv Funct Materials

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“…[ 4 ] With a tailored photothermal design, it is possible to have all these factors synergistically combined. [ 29 ] The goal to ameliorate each individual component is consistent, i.e., to minimize heat loss and maximize efficiency. Therefore, a comprehensive understanding of photothermal conversion by ascertaining its working principle and energy balance becomes particularly necessary.…”

Section: Design Principles To Approach 100% Efficiencymentioning

confidence: 99%

Structure Architecting for Salt‐Rejecting Solar Interfacial Desalination to Achieve High‐Performance Evaporation With In Situ Energy Generation

et al. 2020

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requirement has given rise to research thrusts being focused on the development of solar-driven evaporation based desalination technologies. [4][5][6][7] The research on using solar energy in the desalination process has a long history. [3,8,9] In a traditional singleslope basin-like solar still (Figure 1a), saline water is heated and subsequently evaporated by directly exposing to solar radiation. Solar energy is absorbed and converted into thermal energy by a black light-absorbing liner that is situated at the bottom of the solar basin. [10] Due to this design, the solar absorber is immersed in bulk seawater and it hardly receives a fraction of the incoming solar radiation owing to poor light penetration through the thick water layer. Furthermore, the produced heat is easily dissipated into the bulk water, and further lost to the surroundings through water surface radiation, convection and conduction. Due to the above reasons, the resulting solar-tosteam conversion efficiency is inevitably low. Nanoparticle dispersed fluid was then demonstrated to harness solar energy and found to be a great boon to direct water vapor generation. [11,12] A solar conversion efficiency of up to ≈70% can be possibly achieved because heat loss to bulk water is mitigated ( Figure 1b). [13,14] However, research on this advancement didn't last because of the development of solar interfacial heating strategy, which is shown in Figure 1c. The concept of interfacial evaporation was first put forth in 2014 by two reports simultaneously, [15,16] and received a surge of attention and interest immediately in the following years. The most prominent feature of solar interfacial evaporation lies in the position of the solar absorber, which is at the interface between saline liquid and the above air. This special configuration not only minimizes heat loss from the solar absorber to bulk water, but also provides significantly more surface area for prompt vapor release. Also, solar radiation is photothermally localized at the surface of solar absorber, giving rise to high surface temperature, which enables fast heat transfer to water. With it, water transported from reservoir can be heated and evaporated immediately to achieve a higher rate of steam generation. In addition to the differences in heating strategies, it should be noted that all the solar stills follow the same evaporation-condensation route for desalination and clean water collection, and to this end, a similar device structure (e.g., solar still with sloping cover) is usually employed.The past few years have witnessed a rapid development of solar-driven interfacial evaporation, a promising technology for low-cost water desalination. As of today, solar-to-steam conversion efficiencies close to 100% or even beyond the limit are becoming increasingly achievable in virtue of unique photothermal materials and structures. Herein, the cutting-edge approaches are summarized, and their mechanisms for photothermal structure architecting are uncovered in order to achieve ultrahigh conversion e...

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“…151 Solar driven desalination employing graphene is a fastgrowing subject with many other works worth consideration. [152][153][154] As this review is focused on pressure-driven processes, this opportunity is here also mentioned without entering in too many details.…”

Section: Other Processes Including Solar Desalination Specicmentioning

confidence: 99%

Advantages, limitations, and future suggestions in studying graphene-based desalination membranes

Castelletto

Boretti

2021

RSC Adv.

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Graphene Array-Based Anti-fouling Solar Vapour Gap Membrane Distillation with High Energy Efficiency

Cited by 81 publications

References 40 publications

High‐Yield and Low‐Cost Solar Water Purification via Hydrogel‐Based Membrane Distillation

High‐Yield and Low‐Cost Solar Water Purification via Hydrogel‐Based Membrane Distillation

Structure Architecting for Salt‐Rejecting Solar Interfacial Desalination to Achieve High‐Performance Evaporation With In Situ Energy Generation

Advantages, limitations, and future suggestions in studying graphene-based desalination membranes

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