Practical water production from desert air

Fathieh, Farhad; Kalmutzki, Markus; Kapustin, Eugene A.; Waller, Peter J.; Yang, Jingjing; Yaghi, Omar M.

doi:10.1126/sciadv.aat3198

Cited by 481 publications

(466 citation statements)

References 24 publications

Supporting

Mentioning

401

Contrasting

Unclassified

Order By: Relevance

“…In this regard, Al‐MOFs are of special interest as they combine high operating temperatures, convenient syntheses in aqueous media, and high natural abundance of the metal sources. Moreover, their exceptional chemical stability in both aqueous and organic media makes this class of materials ideal for applications that are unsuitable for most MOFs, such as moisture harvesting, adsorption‐driven heat exchange, and water remediation . Unfortunately, the synthesis of highly crystalline Al‐MOFs is a long‐standing challenge as most of these can only be obtained as nanocrystalline powders and such limitations are known to have detrimental effects on MOFs’ porosity and sorption capacity .…”

Section: Introductionsupporting

confidence: 69%

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa

Gonzalez-Nelson

Shupletsov

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

A modulated synthesis approach based on the chelating properties of oxalic acid (H2C2O4) is presented as a robust and versatile method to achieve highly crystalline Al‐based metal‐organic frameworks. A comparative study on this method and the already established modulation by hydrofluoric acid was conducted using MIL‐53 as test system. The superior performance of oxalic acid modulation in terms of crystallinity and absence of undesired impurities is explained by assessing the coordination modes of the two modulators and the structural features of the product. The validity of our approach was confirmed for a diverse set of Al‐MOFs, namely X‐MIL‐53 (X=OH, CH3O, Br, NO2), CAU‐10, MIL‐69, and Al(OH)ndc (ndc=1,4‐naphtalenedicarboxylate), highlighting the potential benefits of extending the use of this modulator to other coordination materials.

show abstract

Section: Introductionsupporting

confidence: 69%

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa

Gonzalez-Nelson

Shupletsov

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 3a, PGF delivers the rapid moisture sorption with an equilibrium water uptake of 5.20 g g −1 at an RH of 100%, much higher than that of pure rGO and PAAS foam with the value of 0.26 and 1.29 g g −1 , respectively. Compared with previous reports (Table S1, Supporting Information), [13][14][15][16][24][25][26][27][28][29][30][31][32][33][34] PGF in this study shows an outstanding ability for moisture capture in the full range of humidity, which will largely broaden the applications in diverse environments. The microporous structure of PGF provides effective transport channels and an enlarged contact area for moisture, and oxygen functional groups of PAAS can spontaneously capture water molecules through hydrogen bonding ( Figures S3 and S4, Supporting Information).…”

Section: Doi: 101002/adma201905875mentioning

confidence: 51%

“…

contaminated inevitably by the impurities, such as microorganisms, fine particulate matters (PM), and toxic gases like sulfur oxides (SO x ). [13][14][15][16] However, MOF-801 only worked in a narrow RH range (<20% RH) with low water uptake, and the quality of the oozed water from PNI-PAAm/Alg hydrogel was uncertain for the risk of impurities. For instance, metalorganic frameworks (MOFs) like MOF-801 could harvest 0.25 g g −1 water at a relative humidity (RH) of 20%, and poly(Nisopropyl acrylamide)/sodium alginate (PNIPAAm/Alg) polymer hydrogel demonstrated 0.6 g g −1 water uptake at the RH of 80%, respectively.

…”

mentioning

confidence: 99%

Highly Efficient Clean Water Production from Contaminated Air with a Wide Humidity Range

et al. 2019

View full text Add to dashboard Cite

contaminated inevitably by the impurities, such as microorganisms, fine particulate matters (PM), and toxic gases like sulfur oxides (SO x ). [11,12] Recently, miscellaneous hygroscopic materials have been explored for moisture capture. For instance, metalorganic frameworks (MOFs) like MOF-801 could harvest 0.25 g g −1 water at a relative humidity (RH) of 20%, and poly(Nisopropyl acrylamide)/sodium alginate (PNIPAAm/Alg) polymer hydrogel demonstrated 0.6 g g −1 water uptake at the RH of 80%, respectively. [13][14][15][16] However, MOF-801 only worked in a narrow RH range (<20% RH) with low water uptake, and the quality of the oozed water from PNI-PAAm/Alg hydrogel was uncertain for the risk of impurities. As a result, it is still a big challenge for harvesting high-quality clean water free of impurities from the air within a full range of humidity.Herein, we demonstrate a highly efficient clean water production system from a contaminated environment with a wide range of humidity based on a rationally designed sodium polyacrylate (PAAS)/graphene framework (PGF). This porous framework with plentiful oxygen functional groups facilitates the sorption of water vapor in humid air and simultaneously grabs the impurities under van der Waals force (Figure 1). Moreover, a high solar-thermal conversion capability of PGF makes water easily desorbed under sun irradiation. [2,17,18] As a result, such a PGF presents the equilibrium water uptake of 0.14 g g −1 at a low RH of 15%, and a superhigh uptake of 5.20 g g −1 at an RH of 100%, exhibiting the excellent water uptake ability in a wide range of humidity. Under solar irradiation of 1 sun (1 kW m −2 ), the sorbed water can be quickly desorbed into vapor within a few minutes to generate clean water free of impurities. Thus, the PGF meets the requirements of efficient moisture capture, impurities filtration, and clean water production from natural air. For practical application, a lab-made prototype of moisture purification and water harvest (MPWH) system is built to collect over 25 L clean water per kilogram of PGF daily from the atmospheric environment. This PGF offers an efficient platform to capture moisture in ordinary and contaminated air for the production of high-quality clean water.The porous PGF is easily prepared through a convenient freeze-drying method (see details in Materials and Methods, Supporting Information). Typically, PAAS is well dispersed in a graphene oxide (GO) dispersion after ultrasonic treatment (Figure 2a). After the freeze-drying (Figure 2b) and reductionThe huge amount of moisture in the air is an unexplored and overlooked water resource in nature, which can be useful to solve the worldwide water shortage. However, direct water condensation from natural or even hazy air is always inefficient and inevitably contaminated by numerous impurities of dust, toxic gas, and microorganisms. In this regard, a drinkable and clean water harvester from complex contaminated air with a wide humidity range based on porous sodium polyacrylate/graphene framework (PGF...

show abstract

“…In 2017, Yaghi and Wang and co-workers first demonstrated a porous MOF (MOF-801, [Zr 6 O 4 (OH) 4 (fumarate) 6 ]) exhibited superior ability to capture water from the atmosphere at low humidity levels (as low as 20%) by using low-grade heat from natural sunlight. [204] The results found that this device can produce 100 g of water per kilogram of MOF-801 per day-and-night cycle after carefully modifying the condenser and the title angle to the sunlight. Surprisingly, 2.8 L water per kilogram of MOF daily can be delivered at low humidity levels without any energy input.…”

Section: Photothermal-assisted Water Harvesting From Airmentioning

confidence: 95%

Harnessing Solar‐Driven Photothermal Effect toward the Water–Energy Nexus

et al. 2019

View full text Add to dashboard Cite

Producing affordable freshwater has been considered as a great societal challenge, and most conventional desalination technologies are usually accompanied with large energy consumption and thus struggle with the trade‐off between water and energy, i.e., the water–energy nexus. In recent decades, the fast development of state‐of‐the‐art photothermal materials has injected new vitality into the field of freshwater production, which can effectively harness abundant and clean solar energy via the photothermal effect to fulfill the blue dream of low‐energy water purification/harvesting, so as to reconcile the water–energy nexus. Driven by the opportunities offered by photothermal materials, tremendous effort has been made to exploit diverse photothermal‐assisted water purification/harvesting technologies. At this stage, it is imperative and important to review the recent progress and shed light on the future trend in this multidisciplinary field. Here, a brief introduction of the fundamental mechanism and design principle of photothermal materials is presented, and the emerging photothermal applications such as photothermal‐assisted water evaporation, photothermal‐assisted membrane distillation, photothermal‐assisted crude oil cleanup, photothermal‐enhanced photocatalysis, and photothermal‐assisted water harvesting from air are summarized. Finally, the unsolved challenges and future perspectives in this field are emphasized. It is envisioned that this work will help arouse future research efforts to boost the development of solar‐driven low‐energy water purification/harvesting.

show abstract

Practical water production from desert air

Abstract: Next-generation MOF device and material for water production from desert air.

Cited by 481 publications

References 24 publications

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Highly Efficient Clean Water Production from Contaminated Air with a Wide Humidity Range

Harnessing Solar‐Driven Photothermal Effect toward the Water–Energy Nexus

Contact Info

Product

Resources

About