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Science China Materials 2025年第1期68卷 244-252页

作者： Yanyan Ma Jifeng Li Tao Ding Qichun Feng Zhaofang Du Anhui Province Joint Key Laboratory of Cold Insulation Fiber and Clothing Anhui Provincial Engineering Center for Automotive Highly Functional Fiber ProductsSchool of Materials and ChemistryAnhui Agricultural UniversityHefei 230036China Institute of Intelligent Machines Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

water loss rate is crucial in evaluating the efficiency of atmospheric water harvesting(AWH)***,most moisture-absorbing salts and gels have fixed heat transfer rates,limiting the development of high-performance AWH ***,an anisotropic PEG/CS/MF nanocomposite(APCM)with adjustable thermal transfer efficiency is *** was synthesized using polyethylene glycol(PEG),melamine foam(MF),and chitosan(CS)solution through a freeze orientation *** resulting material exhibits a stable oriented laminated structure formed by hydrogen bonding between PEG,CS,and *** unique structure imparts excellent mechanical ***’s large lamellar gaps and pore diameters enable rapid absorption of atmospheric water molecules at low temperatures without leakage(61.79 kg m^(−3)).The compressible nature of APCM allows for efficient heat transfer at high temperatures,and the release of 80%of absorbed water within 15 *** a proof-of-concept demonstration using a custom-built AWH device,each cubic meter of APCM achieved three AWH cycles within 24 h,producing over 185 kg of ***,this innovative design offers a promising solution for enhancing the efficiency of AWH,potentially addressing water scarcity issues in various regions.

关键词： oriented lamellar structure atmospheric water harvesting adjustable thermal transfer efficiency rapid absorption of water efficient water harvesting

Pumping and sliding of droplets steered by a hydrogel pattern for atmospheric water harvesting

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National Science Review 2023年第12期10卷 181-192页

作者： Wei Zhang Qinghua Ji Gong Zhang Zhenao Gu Haozhi Wang Chengzhi Hu Huijuan Liu Zhiyong Jason Ren Jiuhui Qu Center for water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of Environment Tsinghua University Key Laboratory of Drinking water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin University Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment Princeton University

atmospheric water harvesting is an emerging strategy for decentralized and potable water supplies. However,water nucleation and microdroplet coalescence on condensing surfaces often result in surface flooding owing to the lack of a sufficient directional driving force for shedding. Herein, inspired by the fascinating properties of lizards and catfish, we present a condensing surface with engineered hydrogel patterns that enable rapid and sustainable water harvesting through the directional pumping and drag-reduced sliding of water droplets. The movement of microscale condensed droplets is synergistically driven by the surface energy gradient and difference in Laplace pressure induced by the arch hydrogel patterns. Meanwhile, the superhydrophilic hydrogel surface can strongly bond inner-layer water molecules to form a lubricant film that reduces drag and facilitates the sliding of droplets off the condensing surface. Thus, this strategy is promising for various water purification techniques based on liquid–vapor phase-change processes.

关键词： atmospheric water harvesting droplet manipulation bio-inspired condensation

Core-shell-embedded Mesoporous Silica Capsules for atmospheric water harvesting

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 951-959页

作者： ZHANG Shangsheng XU Shuman LEI Ruicheng PAN Yuliang MA Tao ZHANG Zheng LIU Chunsheng ZHANG Zengzhi China University of Mining and Technology-Beijing School of Mechanical Electronic&Information EngineeringBeijing 10083China

A one-step ultrasonic mechanical method was used to synthesize a kind of atmospheric water harvesting material with high water harvesting performance in a wide relative humidity(RH)range,especially at low RH(RHwater harvesting performance of MSC,solid silica nanoparticles(SSN)and mesoporous silica nanoparticles(MSN)were *** a small atmospheric water collection test(25℃,40%RH),the water vapour adsorption and desorption kinetics of MSC,SSN,MSN and a commercial silica gel(CSG)were compared and *** results show that the MSC with mesoporous channels and core-shell structure can provide about 0.324 gwater/gadsorbent,79%higher than the CSG(0.181 gwater/gadsorbent).It is 25.1%higher than that of 0.259 gwater/gadsorbentof un-hollowed MSN and 980%higher than that of0.03 gwater/gadsorbentof un-hollowed *** material has a large specific surface area and pore volume,simple preparation method and low cost,which provides a feasible idea for realising atmospheric water collection in arid and semi-arid regions.

关键词： mesoporous silica nanocapsules core-shell structure atmospheric water harvesting adsorption performance

Multivariate MOF for optimizing atmospheric water harvesting

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Green Energy & Environment 2022年第4期7卷 575-577页

作者： Ao Ma Hengjiang Cong Hexiang Deng College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China Hubei Yangtze Memory Laboratories Wuhan430205China Engineering Research Center of Organosilicon Compounds and Materials-Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China Key Laboratory of Biomedical Polymers-Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China

atmospheric water harvesting offers a powerful and promising solution to address the problem of global freshwater *** the past decade,significant progress has been achieved in utilizing hydrolytically stable metal-organic frameworks as recyclable water-sorbent materials under low relative humidity,especially in those arid ***,Yaghi's group has employed a combined crystallographic and theoretical technique to decipher the water filling mechanism in MOF-303,where the polar organic linkers rather than the inorganic units of MOF are demonstrated as the key ***,the hydrophilic strength of the water-binding pocket in MOFs can be optimized through the approach of multivariate modulations,resulting in enhanced water harvesting properties.

关键词： atmospheric water harvesting Metal-organic framework Multivariate strategy Single-crystal X-ray diffraction water-sorption dynamics

Recent Progress of atmospheric water harvesting Using Metal-Organic Frameworks

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Chemical Research in Chinese Universities 2020年第1期36卷 33-40页

作者： PAN Tingting YANG Kaijie HAN Yu Advanced Membranes and Porous Materials(AMPM)Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)ThuwalSaudi Arabia

atmospheric water harvesting based on vapor adsorption is a newly emerged and potential technology to supply portable water for arid *** efficiently harvest vapor from the air,sorbents are required to have conside-rable adsorption capacity,easy regeneration and high *** the advantages of porous structure,tunable pore size and tailorable hydrophilicity,metal-organic frameworks(MOFs)have demonstrated excellent performance in vapor adsorption and water *** this review,we first discuss the degradation mechanisms of MOFs exposed to water and summarize the structure-stability relationship;by centering on the adsorption isotherms,the connection between the structure of MOFs and the water adsorption property is illuminated;finally,some prospects are suggested in order to push forward the progress of this technology.

关键词： Metal organic framework atmospheric water harvesting Hydrolytic stability water adsorption isotherm

Carbon-based functional materials for atmospheric water utilization

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Nano Research 2023年第11期16卷 12491-12505页

作者： Wenya He Tengyu Lin Huhu Cheng Liangti Qu Laboratory of Flexible Electronics Technology Key Laboratory of Organic Optoelectronics&Molecular EngineeringMinistry of EducationDepartment of ChemistryState Key Laboratory of Tribology in Advanced Equipment(SKLT)Tsinghua UniversityBeijing 100084China

atmospheric water,as one of the most abundant natural resources on Earth,has attracted huge research interest in the field of water harvesting and energy harvesting and conversion owing its environmental friendliness and easy *** developments of new materials have seen advanced technologies that can extract water and energy out of this long-neglected resource,suggesting a promising and sustainable approach to address the water and energy crises over the ***-based functional materials have been considered to be indispensable materials for atmospheric water utilization due to their large surface area,excellent adsorption performance,and higher surface *** this review,first,we analyze the interaction between carbon-based functional materials and atmospheric water ***,technologies developed in recent years for atmospheric water utilization based on carbon-based functional materials are reviewed,mainly focusing on atmospheric water harvesting,moisture-enabled electricity generation,and moisture-responsive ***,the remaining challenges and some tentative suggestions possibly guiding developments are proposed,which may pave a way for a bright future of carbon-based functional material in the utilization of atmospheric water.

关键词： carbon-based functional material atmospheric water atmospheric water harvesting moisture-enabled power generator moisture actuators

一种基于“最优捕集窗口”设计的全球化空气取水系统

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Science Bulletin 2024年第10期69卷 1437-1447页

作者：李乾邵昭邹启宏潘权稳赵曜冯耀辉王雯雯王如竹葛天舒 Institute of Refrigeration and Cryogenics Shanghai Jiao Tong UniversityShanghai 200240China

atmospheric water harvesting(AWH)is a promising solution to the water shortage *** sorption-based AWH(SAWH)systems seldom obtain both wide climatic adaptability and high energy efficiency due to the lack of thermodynamic *** achieve the ideal harvesting circulation in SAWH systems,the“optimal harvesting window”(OHW)design based on thermodynamic analysis was first proposed and validated by our ***“OHW”theory indicates the water production rate and energy efficiency could be improved by properly reducing the adsorption *** the humidity increases,the optimal adsorption temperature should be closer to the dew point of the *** results revealed that,loaded with 3 kg widely adopted silica gel,the daily water production could reach 5.76-17.64 L/d with ultrahigh energy efficiency of 0.46-1.5 L/*** prototype could also achieve optimal performance in wide climatic conditions in terms of 13-35℃and 18%-72%***,the performance of photovoltaic(PV)-driven SAWH was *** showed that a 1 m^(2)PV panel could generate 0.66-2 L water per day in Shanghai throughout the year,the highest in opening ***,this work introduces a promising concept that can help achieve large-scale,ultra-fast,energyefficient AWH worldwide.

关键词： atmospheric water harvesting Thermodynamic optimization Optimal harvesting window Large-scale and worldwide water production

An atmospheric water harvester with fast and energy-saving water removal and recovery

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Biosurface and Biotribology 2023年第1期9卷 9-16页

作者： Jiayu Song Zhang Liu Jhoanne Pedres Boñgol Zhaoxin Zhang King Lun Yeung Department of Chemical and Biological Engineering the Hong Kong University of Science and TechnologyKowloonHong Kong Division of Environment and Sustainability the Hong Kong University of Science and TechnologyKowloonHong Kong Division of Emerging Interdisciplinary Areas The Hong Kong University of Science and TechnologyKowloonHong Kong HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute ShenzhenGuangdongChina

Moisture removal and water recovery from the air are vital for regulating indoor humidity and mitigating water *** atmospheric water harvesters(AWH)focus primarily on increasing the moisture capture rate,but for it to be economical and sustainable,it is essential to consider the energy required to recover and harvest the captured ***,a mechanically flexible,biphilic sorption-based AWH made of green,environmentally friendly material is *** consists of a hygroscopic chitosan polymer embedded within a flexible,hydrophobic silica xerogel that can harvest 86.3 g water/g chitosan at 97%relative humidity and 25℃reaching saturation after 30 days(i.e.2.88 g water/g chitosan/day).Roughly 88%of the sorbed moisture was recovered by mechanical squeezing(ca.0.020 MPa)within 150 *** water harvesting experiments and uniaxial compression tests demonstrate that chitosan-silica xerogel is durable for longterm operations,providing a fast,reliable,and sustainable moisture removal and water harvesting tool.

关键词： atmospheric water harvesting flexible xerogel heterogeneous wettability mechanical water recovery

面向可持续淡水供应的吸附式空气取水技术的研究进展与展望:材料、装置和系统

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Science Bulletin 2024年第5期69卷 671-687页

作者：白钊远王鹏飞许嘉兴王如竹李廷贤 Institute of Refrigeration and Cryogenics School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Research Center of Solar Power and Refrigeration(Ministry of Education) Shanghai Jiao Tong UniversityShanghai 200240China

Establishing alternative methods for freshwater production is imperative to effectively alleviate global water scarcity,particularly in land-locked arid *** this context,extracting water from the ubiquitous atmospheric moisture is an ingenious strategy for decentralized freshwater ***-based atmospheric water harvesting(SAWH)shows strong potential for supplying liquid water in a portable and sustainable way even in desert ***,the latest progress in SAWH technology in terms of materials,devices,and systems is *** advances in sorbent materials with improved water uptake capacity and accelerated sorption–desorption kinetics,including physical sorbents,polymeric hydrogels,composite sorbents,and ionic solutions,are *** thermal designs of SAWH devices for improving energy utilization efficiency,heat transfer,and mass transport are evaluated,and the development of representative SAWH prototypes is clarified in a chronological ***,state-of-the-art operation patterns of SAWH systems,incorporating intermittent,daytime continuous and 24-hour continuous patterns,are ***,current challenges and future research goals of this cutting-edge field are *** review highlights the irreplaceable role of heat and mass transfer enhancement and facile structural improvement for constructing high-yield water harvesters.

关键词： atmospheric water harvesting water vapor sorption water sorbents Thermal design Heat transfer Mass transport

Photothermal hygroscopic hydrogel for simultaneous generation of clean water and electricity

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Science China(Technological Sciences) 2023年第10期66卷 2958-2967页

作者： REN TingTing HUANG Lu XIE ShangZhen CHEN GuoPeng LIU Peng CHEN LinGen Institute of Thermal Science and Power Engineering Wuhan Institute of TechnologyWuhan 430205China School of Mechanical&Electrical Engineering Wuhan Institute of TechnologyWuhan 430205China

harvesting water from the air using adsorbents and obtaining fresh water by solar-driven desorption is considered as one of the most effective ways to solve the freshwater crisis in arid and desert *** on a simple and low-cost photothermal hygroscopic hydrogel,a new strategy is proposed to boost solar energy efficiency by coupling solar-driven atmospheric water harvesting technology with thermoelectric power generation technology in this *** hygroscopic hydrogel ink PAM-CaCl_(2)is prepared by in situ polymerization using Acrylamide as monomer,Ammonium persulfate as thermal initiator and CaCl_(2)as hygroscopic *** the day,the photothermal hygroscopic hydrogel absorbs solar energy and evaporates its own internal water to obtain fresh ***,the residual waste heat is utilized to power the thermoelectric panel,which produces electricity based on Seebeck *** night,the hydrogel harvests water molecules in the air to achieve *** hybrid system can achieve a water production rate of 0.33 kg m^(-2)h^(-1)and an additional electrical energy gain of 124 mW m^(-2)at 1 kW m^(-2)solar *** model of the hybrid system is developed to understand the heat flow and thermoelectric generation *** results provide new insights into energy and freshwater replenishment options in arid or desert areas with abundant solar energy.

关键词： photothermal hygroscopic hydrogel atmospheric water harvesting solar steam generation thermoelectric power generation