Tailoring the Desorption Behavior of Hygroscopic Gels for Atmospheric Water Harvesting in Arid Climates DOI Creative Commons
Hengyi Lu, Wen Shi, James H. Zhang

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(37)

Published: July 28, 2022

The ubiquitous nature of atmospheric moisture makes it a significant water resource available at any geographical location. Atmospheric harvesting (AWH) technology, which extracts from the ambient air to generate clean water, is promising strategy realize decentralized production. high uptake by salt-based sorbents them attractive for AWH, especially in arid environments. However, they often have relatively desorption heat, rendering release an energy-intensive process. A LiCl-incorporating polyacrylamide hydrogel (PAM-LiCl) capable effective environments proposed. interactions between hydrophilic network and captured more free weakly bonded significantly lowering heat compared with conventional neat salt sorbents. Benefiting affinity swelling polymer backbones, developed PAM-LiCl achieves ≈1.1 g g-1 20% RH fast sorption kinetics ≈0.008 min-1 further demonstrates daily yield up ≈7 this condition. These findings provide new pathway synthesis materials efficient absorption/desorption properties, reach energy-efficient AWH climates.

Language: Английский

A historical overview of the activation and porosity of metal–organic frameworks DOI
Xuan Zhang, Zhijie Chen, Xinyao Liu

et al.

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(20), P. 7406 - 7427

Published: Jan. 1, 2020

Since the first reports of metal-organic frameworks (MOFs), this unique class crystalline, porous materials has garnered increasing attention in a wide variety applications such as gas storage and separation, catalysis, enzyme immobilization, drug delivery, water capture, sensing. A fundamental feature MOFs is their porosity which provides space on micro- meso-scale for confining exposing functionalities. Therefore, designing with high developing suitable activation methods preserving accessing pore have been common theme MOF research. Reticular chemistry allows facile design from highly tunable metal nodes organic linkers order to realize different structures, topologies, With hope shedding light future research endeavors porosity, it worthwhile examine development MOFs, an emphasis how properly access space. In review, we will provide overview historic evolution followed by synopsis strategies preserve permanent MOFs.

Language: Английский

Citations

535
Evolution of water structures in metal-organic frameworks for improved atmospheric water harvesting DOI
Nikita Hanikel, Xiaokun Pei, Saumil Chheda

et al.

Science, Journal Year: 2021, Volume and Issue: 374(6566), P. 454 - 459

Published: Oct. 22, 2021

Designing water uptake Although the locations of molecules in some porous materials have been determined with diffraction techniques, determining filling sequence sites has challenging. Hanikel et al . used single-crystal x-ray to locate all pores metal-organic framework MOF-303 at different loadings (see Perspective by Öhrström and Amombo Noa). They this information on molecule adsorption modify linkers MOF control water-harvesting properties from humid air for temperature regimes. —PDS

Language: Английский

Citations

476
Metal–Organic Frameworks for Water Harvesting from Air, Anywhere, Anytime DOI Creative Commons
Wentao Xu, Omar M. Yaghi

ACS Central Science, Journal Year: 2020, Volume and Issue: 6(8), P. 1348 - 1354

Published: July 13, 2020

Water is essential to life. It estimated that by 2050 nearly half of the world population will live in water stressed regions, due either arid conditions or lack access clean water. This Outlook, written for general readers, outlines parameters this vexing societal problem and presents a solution global challenge. There plenty air potentially can be harvested not only from desert atmosphere where humidity low but also more humid regions needed. In principle, materials used harvest these climates should applicable deployment anywhere extract atmospheric at any time year. Metal–organic frameworks (MOFs) have emerged as unique class porous capable trapping relative levels 10%, doing so with facile uptake release kinetics. From laboratory testing field trials driest deserts, kilogram quantities MOFs been tested several generations devices. The initial results experiments showed could capture deliver over one liter per MOF day. More than an order magnitude increase productivity achieved members family when employed electrified device operating many cycles We show vision having year realizable idea giving "water independence" citizens world.

Language: Английский

Citations

374
Solar-Powered Sustainable Water Production: State-of-the-Art Technologies for Sunlight–Energy–Water Nexus DOI
Zhengtong Li, Xingtao Xu,

Xinran Sheng

et al.

ACS Nano, Journal Year: 2021, Volume and Issue: 15(8), P. 12535 - 12566

Published: July 19, 2021

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

Language: Английский

Citations

357
Weakly Humidity‐Dependent Proton‐Conducting COF Membranes DOI
Li Cao, Hong Wu, Yuliang Cao

et al.

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(52)

Published: Nov. 12, 2020

Abstract State‐of‐the‐art proton exchange membranes (PEMs) often suffer from significantly reduced conductivity under low relative humidity, hampering their efficient application in fuel cells. Covalent organic frameworks (COFs) with pre‐designable and well‐defined structures hold promise to cope the above challenge. However, fabricating defect‐free, robust COF proves an extremely difficult task due poor processability of materials. Herein, a bottom‐up approach is developed synthesize intrinsic proton‐conducting (IPC‐COF) nanosheets (NUS‐9) aqueous solutions via diffusion solvent co‐mediated modulation, enabling controlled nucleation in‐plane‐dominated IPC‐COF growth. These allow facile fabrication membranes. crystalline, rigid ion nanochannels exhibit weakly humidity‐dependent over wide range humidity (30–98%), 1–2 orders magnitude higher than that benchmark PEMs, prominent cell performance 0.93 W cm −2 at 35% RH 80 ° C arising superior water retention Grotthuss mechanism‐dominated conduction.

Language: Английский

Citations

296
Adsorption-based atmospheric water harvesting DOI Creative Commons
Mojtaba Ejeian, R.Z. Wang

Joule, Journal Year: 2021, Volume and Issue: 5(7), P. 1678 - 1703

Published: May 11, 2021

Language: Английский

Citations

271
Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent DOI Creative Commons
Jiaxing Xu, Tingxian Li, Taisen Yan

et al.

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(11), P. 5979 - 5994

Published: Jan. 1, 2021

A rapid-cycling continuous solar-driven atmospheric water harvester, enabled by vertically aligned nanocomposite sorbent, was developed for realizing ultrahigh production.

Language: Английский

Citations

262
Dual-Stage Atmospheric Water Harvesting Device for Scalable Solar-Driven Water Production DOI Creative Commons
Alina LaPotin, Yang Zhong, Lenan Zhang

et al.

Joule, Journal Year: 2020, Volume and Issue: 5(1), P. 166 - 182

Published: Oct. 14, 2020

Language: Английский

Citations

261
Reticular Chemistry for Highly Porous Metal–Organic Frameworks: The Chemistry and Applications DOI
Zhijie Chen, Kent O. Kirlikovali, Peng Li

et al.

Accounts of Chemical Research, Journal Year: 2022, Volume and Issue: 55(4), P. 579 - 591

Published: Feb. 3, 2022

ConspectusCurrent global crises related to clean energy and the environment entail development of materials that are capable addressing these challenges. Metal–organic frameworks (MOFs), a class functional assembled from metal-containing nodes organic ligands via coordination bonds, have been successfully developed for various applications, including catalysis, toxic chemical removal, gas storage separation, as result their highly tailorable nature precisely engineered pore structures. In particular, exceptionally high surface areas porosities MOFs two most attractive characteristics place them among best porous gases, such hydrogen methane. Reticular chemistry stands out prominent approach design this strategy allows rational top-down guided by topological nets afford extended framework structures with precise architectural arrangements at molecular level. Bridging gap between reticular strategies can facilitate next-generation high-performance through state-of-the-art design.In Account, we summarize our group's efforts over past few years toward synthesis applications inspired chemistry. First, describe how leveraged synthesize NU-1500, which is based on 6-connected edge-transitive acs net, assembly triptycene-based high-valent metal trimers. This delicate amenable isoreticular expansion, an additional phenyl group in rigid ligand NU-1500 yields NU-1501. Importantly, NU-1501-Al exhibits both gravimetric Brunauer–Emmett–Teller (BET) area 7310 m2 g–1, current record after satisfying four BET consistency criteria, volumetric 2060 cm–3. The porosity NU-1501 promising adsorbents methane hydrogen. Second, illustrate stable Zr-MOFs nets: (1) successful expansions NU-1000 (a 4,8-connected csq net) form hierarchical mesoporous sizes up 6.7 nm; (2) Zr6 clusters tetracarboxylates NU-1100 series (4,12-connected ftw 4300–6500 g–1; (3) use hexacarboxylates combination results formation NU-1600 6,12-connected alb 2000–4500 g–1. Third, exploration access uranium-based MOFs, NU-1300 3,4-connected tbo 2100 g–1) NU-1301 3-connected nun 4750 g–1). investigated structurally complex NU-1301, formed serendipitously uranyl triangular carboxylates structure largest unit cell all reported MOFs.Finally, provide overview potential water capture, storage, separation dyes biological macromolecules. We hope Account may serve blueprint stimulate researchers develop next generation energy- environment-related beyond.

Language: Английский

Citations

245
Global potential for harvesting drinking water from air using solar energy DOI Creative Commons
Jackson Lord, Ashley Thomas,

Neil D. Treat

et al.

Nature, Journal Year: 2021, Volume and Issue: 598(7882), P. 611 - 617

Published: Oct. 27, 2021

Abstract Access to safely managed drinking water (SMDW) remains a global challenge, and affects 2.2 billion people 1,2 . Solar-driven atmospheric harvesting (AWH) devices with continuous cycling may accelerate progress by enabling decentralized extraction of from air 3–6 , but low specific yields (SY) daytime relative humidity (RH) have raised questions about their performance (in litres output per day) 7–11 However, our knowledge, no analysis has mapped the potential AWH 12 despite favourable conditions in tropical regions, where two-thirds without SMDW live 2 Here we show that could provide for people. Our assessment—using Google Earth Engine 13 —introduces hypothetical 1-metre-square device SY profile 0.2 2.5 kilowatt-hour (0.1 1.25 2-metre-square device) at 30% 90% RH, respectively. Such meet target average daily requirement 5 day person 14 We plot impact existing new sorbent classes, which suggests these targets be met continued technological development, well within thermodynamic limits. Indeed, been achieved experimentally demonstrations materials 15–17 tools can inform design trade-offs maximize impact, alongside ongoing efforts Sustainable Development Goals (SDGs) technologies.

Language: Английский

Citations

244