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Eutectic-derived synthesis of hierarchically nanoporous copper for electrochemical actuation and solar steam generation

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Nano Research 2024年第3期17卷 2011-2018页

作者： Qingguo Bai Yan Wang Fuquan Tan Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China School of Applied Physics and Materials Wuyi UniversityDongcheng Village 22Jiangmen 529020China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022China

The utilization of nanoporous copper(np-Cu)as a metallic actuator has gained attention in recent years due to its cost-effectiveness in comparison to other precious *** this,the enhancement of np-Cu’s actuation performance remains a challenge due to limitations in its strain amplitude and actuation ***,np-Cu has been deemed as a promising material for solar absorption due to its localized surface plasmon resonance ***,practical applications such as solar steam generators(SSGs)utilizing np-Cu have yet to be *** this study,we present the development of hierarchically nanoporous copper(HNC)through the dealloying of a eutectic Al-Cu *** hierarchical structure of the HNC features a combination of ordered flat channels and randomly distributed continuous nanopores,which work in synergy to improve actuation *** ordered flat channels,with a sub-micron scale,facilitate rapid mass transport of electrolyte ions,while the nano-sized continuous pores,due to their large specific surface area,enhance the induced *** results indicate that the HNC exhibits improved actuation performance,with a two times increase in both strain amplitude and rate in comparison to other reported ***,the HNC,for the first time,showcases excellent solar steam generation capabilities,with an evaporation rate of 1.47 kg·m^(-2)·h^(-1) and a photothermal conversion efficiency of 92%under a light intensity of 1 kW·m^(-2),which rivals that of nanoporous gold and silver *** enhanced actuation performance and newly discovered solar steam generation properties of the HNC are attributed to its hierarchically porous structure.

关键词： eutectic alloy dealloying hierarchically nanoporous copper(HNC) actuation solar steam generation

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Vertically aligned reduced graphene oxide/Ti_(3)C_(2)T_(x)MXene hybrid hydrogel for highly efficient solar steam generation

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Nano Research 2020年第11期13卷 3048-3056页

作者： Wei Li Xiaofeng Li Wei Chang Jing Wu Pengfei Liu Jianjun Wang Xi Yao Zhong-Zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China Institute of Chemistry Chinese Academy of SciencesBeijing100190China Department of Biomedical Sciences City University of Hong KongHong Kong999077China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing100029China

Effective utilization of abundant solar energy for desalination of seawater and purification of wastewater is one of sustainable techniques for production of clean water,helping relieve global water resource ***,we fabricate a vertically aligned reduced graphene oxide/Ti_(3)C_(2)T_(x)MXene(A-RGO/MX)hybrid hydrogel with aligned channels as an independent solar steam generation device for highly efficient solar steam *** vertically aligned channels,generated by a liquid nitrogen-assisted directional-freezing process,not only rapidly transport water upward to the evaporation surface for efficient solar steam generation,but also facilitate multiple reflections of solar light inside the channels for efficient solar light *** deliberate slight reduction endows the RGO with plenty of polar groups,decreasing the water vaporization enthalpy effectively and hence accelerating water evaporation *** MXene sheets,infiltrated inside the A-RGO hydrogel on the basis of Marangoni effect,enhance light absorption capacity and photothermal conversion *** a result,the A-RGO/MX hybrid hydrogel achieves a water evaporation rate of 2.09 kg·m^(−2)·h^(−1)with a high conversion efficiency of 93.5%under 1-sun ***,this photothermal conversion hydrogel rapidly desalinates seawater and purifies wastewater to generate clean water with outstanding ion rejection rates of above 99%for most ions.

关键词： anisotropic hydrogel MXene reduced graphene oxide solar steam generation aligned channels

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Performance of a bi-layer solar steam generation system working at a high-temperature of top surface

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Frontiers in Energy 2023年第1期17卷 141-148页

作者： Jinxin ZHONG Congliang HUANG School of Electrical and Power Engineering China University of Mining and TechnologyXuzhou 221116China Center for Phononics and Thermal Energy Science China-EU Joint Laboratory for NanophononicsSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China Department of Mechanical Engineering University of ColoradoBoulderCO 80309-0427USA

Many efforts have been focused on enhancing the vapor generation in bi-layer solar steam generation systems for obtaining as much pure water as ***,the methods to enhance the vapor temperature is seldom studied although the high-temperature vapor has a wide use in medical sterilization and electricity *** this work,to probe the high-temperature vapor system,an improved macroscopic heat and mass transfer model was ***,using the finite element method to solve the model,the influences of some main factors on the evaporation efficiency and vapor temperature were discussed,including effects of the vapor transport conditions and the heat dissipation *** results show that the high-temperature vapor could not be obtained by enhancing the heat-insulating property of the bi-layer systems but by applying the optimal porosity and proper *** paper is expected to provide some information for designing a bi-layered system to produce high-temperature vapor.

关键词： solar steam generation solar energy numerical method porous material

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Self-Supporting Nanoporous Copper Film with High Porosity and Broadband Light Absorption for Efficient solar steam generation

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Nano-Micro Letters 2023年第7期15卷 57-71页

作者： Bin Yu Yan Wang Ying Zhang Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061People’s Republic of China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022People’s Republic of China

solar steam generation(SSG)is a potential technology for freshwater production,which is expected to address the global water shortage *** noble metals with good photothermal conversion performance have received wide concerns in SSG,while high cost limits their practical applications for water ***,a self-supporting nanoporous copper(NP-Cu)film was fabricated by one-step dealloying of a specially designed Al_(98)Cu_(2)precursor with a dilute solid solution ***-situ and ex-situ characterizations were performed to reveal the phase and microstructure evolutions during *** NP-Cu film shows a unique three-dimensional bicontinuous ligament-channel structure with high porosity(94.8%),multi scale-channels and nanoscale ligaments(24.2±4.4nm),leading to its strong broadband absorption over the 200–2500 nm wavelength More importantly,the NP-Cu film exhibits excellent SSG performance with high evaporation rate,superior efficiency and good *** strong desalination ability of NP-Cu also manifests its potential applications in seawater *** related mechanism has been rationalized based upon the nanoporous network,localized surface plasmon resonance effect and hydrophilicity.

关键词： solar steam generation Nanoporous copper Broadband solar absorption Localized surface plasmon resonance Seawater desalination Dealloying

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Nanoporous black silver film with high porosity for efficient solar steam generation

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Nano Research 2023年第4期16卷 5610-5618页

作者： Bin Yu Yan Wang Ying Zhang Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022China

Given the challenges brought by the shortage of freshwater resources,solar water evaporation has been regarded as one of the most promising technologies for harnessing abundant sunlight to harvest clean water from the *** metals have attracted extensive attention in solar water evaporation due to their localized surface plasmon resonance effect,but highly porous metallic films with high evaporation efficiency are ***,a self-supporting black nanoporous silver(NP-Ag)film was fabricated by dealloying of an extremely dilute Al99Ag1 *** choice of the dilute precursor guarantees the formation of the NP-Ag film with high porosity(96.5%)and low density(0.3703 g·cm^(-3),even smaller than the lightest metal lithium).The three-dimensional ligament-channel network structure and the nanoscale(14.6 nm)of ligaments enable the NP-Ag film to exhibit good hydrophilicity and broadband absorption over 200‒2,500 *** importantly,the solar evaporator based on the NP-Ag film shows efficient solar steam generation,including the efficiency of 92.6%,the evaporation rate of 1.42 kg·m^(-2)·h^(-1)and good cycling stability under one sun ***,the NP-Ag film exhibits acceptable seawater desalination property with the ion rejection for Mg^(2+),Ca^(2+),K^(+)and Na^(+)more than 99.3%.Our findings could provide a new idea and inspiration for the design and fabrication of metal-based photothermal films in real solar evaporation applications.

关键词： photothermal materials nanoporous silver surface plasmon resonance solar steam generation seawater desalination

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Amphipathic Janus Nanofibers Aerogel for Efficient solar steam generation

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Energy & Environmental Materials 2024年第4期7卷 422-432页

作者： Rui Wang Jinshuo Deng Ping Wu Qianli Ma Xiangting Dong Wensheng Yu Guixia Liu Jinxian Wang Lei Liu Chongqing Research Institute Changchun University of Science and TechnologyChongqing 401135China Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province Changchun University of Science and TechnologyChangchun 130022China

solar steam generation is a promising water purification technology due to its low-cost and environmentally friendly applications in water purification and ***,hydrophilic or hydrophobic materials alone are insufficient in achieving necessary characteristics for constructing highquality solar steam generators with good comprehensive ***,novel hydrophile/hydrophobe amphipathic Janus nanofibers aerogel is designed and used as a host material for preparing solar steam *** product consists of an internal cubic aerogel and an external layer of photothermal *** internal aerogel is composed of electrospun amphipathic Janus *** to the unique composition and structure,the prepared solar steam generator integrates the features of high water evaporation rate(2.944 kg m^(-2)h^(-1)under 1 kW m^(-2)irradiation),selffloating,salt-resisting,and fast performance recovery after ***,the product also exhibits excellent properties on desalination and removal of organic *** with traditional hydrophilic aerogel host material,the amphipathic Janus nanofibers aerogel brings much higher water evaporation rate and salt resistance.

关键词： aerogels electrospinning photothermal materials solar desalination solar steam generation

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Emulsion‐templated synthesis of 3D evaporators for efficient solar steam generation

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SmartMat 2023年第2期4卷 69-77页

作者： Jinxing Chen Michael Lee Yinghua Qiu Chaolumen Wu Bo Li Yadong Yin Jiangsu Key Laboratory for Carbon‐Based Functional Materials and Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and DevicesInstitute of Functional Nano and Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsuChina Department of Chemistry University of CaliforniaRiversideCaliforniaUSA

Interfacial solar steam generation holds great promise in water desalination thanks to its high energy efficiency by heating only the top layer of water for *** three‐dimensional(3D)evaporators have been proven to increase the evaporation rate by harnessing the energy from the surroundings,further development is still required in terms of convenient fabrication with potential ***,we propose to overcome this challenge by using a high internal phase emulsion(HIPE)to template the synthesis of 3D hierarchically porous *** HIPE‐templated synthesis combined with a molding process can efficiently fabricate the desired 3D shape without wasting any materials and generate a hierarchically porous internal structure for continuous water *** the overall shape and internal pores produces a 3D evaporator that can suppress conduction heat loss and efficiently collect thermal energy from its surroundings,boosting the evaporation rate to 2.82 kg/(m2 h)under 1‐sun illumination,which is significantly higher than conventional 2D ***‐templating synthesis is an easy but effective way to produce various porous polymers,promising for a wide range of applications where easy production,excellent shape control,and potential scalability are critical.

关键词： 3D evaporator high internal phase emulsion photothermal conversion solar steam generation templating synthesis

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Enhancing solar steam generation using a highly thermally conductive evaporator support

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Science Bulletin 2021年第24期66卷 2479-2488,M0004页

作者： Yida Wang Xuan Wu Pan Wu Jingyuan Zhao Xiaofei Yang Gary Owens Haolan Xu Future Industries Institute University of South AustraliaMawson Lakes CampusAdelaideSA 5095Australia College of Science Nanjing Forestry UniversityNanjing 210037China

Interfacial solar steam generation is an efficient water evaporation technology which has promising applications in desalination,sterilization,water purification and treatment.A common component of evaporator design is a thermal-insulation support placed between the photothermal evaporation surface and bulk *** configuration,common in 2-dimensional(2 D)evaporation systems,minimizes heat loss from evaporation surface to bulk water,thus localizing the heat on the evaporation surface for efficient *** design is subsequently directly adopted for 3-dimensional(3 D)evaporators without any consideration if it is ***,unlike 2 D solar evaporators,the 3 D evaporators can also harvest additional energy(other than solar light)from the air and bulk water to enhance evaporation *** this scenario,the use of thermal insulator support is not proper since it will hinder energy extraction from ***,the traditional 3 D evaporator configuration was completely redesigned by using a highly thermally conductive material,instead of a thermal insulator,to connect evaporation surfaces and the bulk *** higher evaporation rates were achieved by this strategy,owing to the rapid heat transfer from the bulk water to the evaporation *** and outdoor tests both confirmed that evaporation performance could be significantly improved by substituting a thermal insulator with thermally conductive *** findings will redirect the future design of 3 D photothermal evaporators.

关键词： solar steam generation Photothermal materials Heat conduction Reduced graphene oxide Water evaporation 3D evaporator

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A green and efficient strategy facilitates continuous solar-induced steam generation based on tea-assisted synthesis of gold nanoflowers

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Nano Research 2022年第7期15卷 6705-6712页

作者： Guoshuai Zhu Gaoxing Jing Guorong Xu Qiang Li Ruijia Huang Feng Li Haoxuan Li Dong Wang Wenwen Chen Ben Zhong Tang Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging School of Biomedical EngineeringShenzhen University Health Science CenterShenzhen 518055China Key Laboratory of Eco-Textiles(Ministry of Education) Nonwoven Technology LaboratoryJiangnan UniversityWuxi 214122China The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources(MNR)Tianjin 300192China Centre for AIE Research College of Material Science and EngineeringShenzhen UniversityShenzhen 518055China School of Science and Engineering Shenzhen Key Laboratory of Functional Aggregate MaterialsThe Chinese University of Hong KongShenzhen 518172China

Developing a highly efficient system for solar steam generation(SSG)using a straightforward and eco-friendly method to harvest freshwater is fascinating but ***,we stir the mixture of brewed tea and HAuCl4 to prepare Au nanoflowers,possessing broad wavelength light absorption and excellent photothermal *** freeze-drying the mixture of Au nanoflowers,cellulose nanocrystals(CNCs),and aqueous polyurethane(PU)emulsion,we obtain three-dimensional(3D)porous structures(CNC-PU-Au)for *** whole process does not involve any sophisticated procedure or produce detrimental *** evaporation rates are 2.24 kg·m^(−2)·h^(−1) for pure water and 2.18 kg·m^(−2)·h^(−1) for seawater using CNC-PU-Au under one *** solar energy conversion efficiency is up to 90.92%under one sun ***,CNC-PU-Au shows self-driven salt resistance and *** outdoors application for seawater desalination,the maximum evaporation rate can maintain at 2.19 kg·m^(−2)·h^(−1) in spring and 3.42 kg·m^(−2)·h^(−1) in *** unique features promise the utility of CNC-PU-Au in the ecofriendly water treatment industry.

关键词： Au nanoflowers solar steam generation eco-friendly self-cleaning seawater desalination

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Natural high-porous diatomaceous-earth based self-floating aerogel for efficient solar steam power generation

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Green Energy & Environment 2024年第2期9卷 378-389页

作者： Aitang Zhang Kai Wang Md Julker Nine Mengyu Cao Hanwen Zong Zhiqiang Liu Hanwen Guo Jingquan Liu Dusan Losic College of Materials Science and Engineering Institute for Graphene Applied Technology InnovationCollaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong ProvinceQingdao UniversityQingdao266071China The University of Adelaide School of Chemical Engineering and Advanced MaterialsARC Graphene Research HubNorth Engineering BuildingN206 AdelaideSA 5005Australia

The application of solar steam generation in seawater desalination is an effective way to solve the shortage of fresh water *** present,many kinds of photothermal conversion materials have been developed and used as evaporators in seawater ***,some evaporators need additional thermal insulation or water supply devices to achieve efficient photothermal *** addition,their complex,time consuming and no scalable preparation process,high cost of raw materials and poor salt resistance hinder the practical application of these *** to its distinctive nanoporous structure,diatomite as fossilized single-cells algae diatoms is a promising natural silica-based material for seawater *** are taken from sea and that makes true sense to use them in the ***,we report the first example of synthesis robust three-dimensional(3D)natural-diatomite composite by assembling polyaniline nanoparticles covered diatomite into the polyvinyl alcohol pre-treated melamine foam frameworks and demonstrate its application as new evaporator for seawater *** porous framework does not only improve the sunlight scattering efficiency,but also offer large network of channels for water *** inherent mechanism behind salt desalination process involves the absorption of water molecules on the surface of the internal silica micro-nano pores,and evaporation under the heat induced by the polyaniline absorbed ***,the metal ions are segregated by many available pores and channels to achieve the self-desalting *** developed evaporator possesses the superiority of multi-stage pore structure,strong hydrophilicity,low thermal conductivity,excellent light absorption,fast water transportation and salt-resistant crystallization as well as good *** evaporation rate without an additional device is found to be 1.689 kg m^(-2)h^(-1)under 1-Sun irradiation,and the energy conversion efficiency is as

关键词： Diatomite Micro/nanopores Polyaniline Three-dimensional composite solar steam generation

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