The solar interfacial evaporation has a broad application prospect in the fields of steam generation and seawater desalination to deal with the global shortage of fresh-water resources.Bamboo is a great material for s...The solar interfacial evaporation has a broad application prospect in the fields of steam generation and seawater desalination to deal with the global shortage of fresh-water resources.Bamboo is a great material for solar interface evaporators because of its low thermal conductivity and inherent micro-channel porous structure.In this paper,a novel bamboo-based solar interface evaporator with a bionic ripple wave surface structure has been proposed.The subsequent evaporation experiments have been conducted to investigate the salt resistance,stability and water absorption of the bionic ripple bamboo based solar interface evaporator.The results have exhibited that the bamboo's water absorption has been enhanced after carbonization modification.Besides,it should be pointed out that this bamboo-based evaporator’s evaporation rate has dropped during the prolonged simulated seawater evaporation experiment,yet it remained fairly consistent at approximately 1.626 kg·m^(-2)·h^(-1).The appearance for this experimental phenomenon is the decrease of the floatability of the evaporator constricted by the stored water body absorbed by the evaporator and the deposition of NaCl crystals at the photothermal interface.Besides,compared with the plate-structure evaporator,the salt deposition in the evaporator equipped with the bionic ripple wave surface structure is greatly improved.In regard to its advantages in low cost,environmental friendliness,good salt tolerance and high evaporation rate,the bamboo-based solar interface evaporator with a bionic ripple wave surface structure can provide a potential solution to the global problem of fresh-water shortage.展开更多
The treatment of ammonia nitrogen wastewater(ANW)has garnered significant attention due to the ecology,and even biology is under increasing threat from over discharge ANW.Conventional ANW treatment methods often encou...The treatment of ammonia nitrogen wastewater(ANW)has garnered significant attention due to the ecology,and even biology is under increasing threat from over discharge ANW.Conventional ANW treatment methods often encounter challenges such as complex processes,high costs and secondary pollution.Considerable progress has been made in employing solar-induced evaporators for wastewater treatment.However,there remain notable barriers to transitioning from fundamental research to practical applications,including insufficient evaporation rates and inadequate resistance to biofouling.Herein,we propose a novel evaporator,which comprises a bio-enzyme-treated wood aerogel that serves as water pumping and storage layer,a cost-effective multi-walled carbon nanotubes coated hydrophobic/hydrophilic fibrous nonwoven mat functioning as photothermal evaporation layer,and aggregation-induced emission(AIE)molecules incorporated as anti-biofouling agent.The resultant bioinspired evaporator demonstrates a high evaporation rate of 12.83 kg m^(−2) h^(−1) when treating simulated ANW containing 30 wt%NH4Cl under 1.0 sun of illumination.AIE-doped evaporator exhibits remarkable photodynamic antibacterial activity against mildew and bacteria,ensuring outstanding resistance to biofouling over extended periods of wastewater treatment.When enhanced by natural wind under 1.0 sun irradiation,the evaporator achieves an impressive evaporation rate exceeding 20 kg m^(−2) h^(−1) .This advancement represents a promising and viable approach for the effective removal of ammonia nitrogen wastewater.展开更多
Although the application of solar-driven interfacial evaporation technology in the field of seawater desalination has seen rapid progress in recent years,mediocre water evaporation rates remain a longstanding bottlene...Although the application of solar-driven interfacial evaporation technology in the field of seawater desalination has seen rapid progress in recent years,mediocre water evaporation rates remain a longstanding bottleneck.The key to resolving this bottleneck is leveraging strong hydrogen bonding to reduce the enthalpy of evaporation for water molecules and inputting environmental energy.This study presents a novel approach for reducing the enthalpy of vaporization by introducing a hydrophilic inorganic material Al(H2PO4)3(AP)on the surface of cellulose nanofibers(CNF)to form an inorganic‒organic hydrogen-bonded network in cellulose-based hydrogels(labeled 3DL Metagel).This network structure accelerates the diffusion of water molecules between CNF,as confirmed by molecular dynamics simulations.Specifically,inspired by multiple biological traits found in nature,the 3DL Metagel evaporator integrates a lotus shape,Janus wettability(the superhydrophilic lotus-like flower with hydrophobic lotus-like leaves)and plant transpiration,resulting in superior water evaporation rates of up to 3.61 kg・m^(−2)・h^(−1) under 1.0 solar radiation(exceeding the limit of two-dimensional evaporators).The unique lotus shape enables 3DL Metagel to draw additional energy from the environment during desalination,resulting in a maximum water evaporation efficiency of 94.94%.The dual porous structure with Janus wettability endows the evaporator with self-floating ability and a unidirectional salt ion reflux channel during the evaporation process,providing a salt-resistant technology for seawater desalination.Noteworthy,evaporator can be used for efficient outdoor water purification in arid areas with extremely low humidity and is biodegradable and biocompatible.The integration of an inorganic‒organic hydrogen-bonded crosslinked network and biomimetic features achieves high-efficiency photothermal water evaporation,offering novel insights for the rational design of efficient evaporators for solar desalination and wastewater purification.展开更多
Solar-driven interfacial water evaporation technology offers a zero-carbon,sustainable solution for extracting clean water from seawater and wastewater,presenting an effective strategy to address the global water cris...Solar-driven interfacial water evaporation technology offers a zero-carbon,sustainable solution for extracting clean water from seawater and wastewater,presenting an effective strategy to address the global water crisis.This study has employed finite element simulation to investigate the solar interfacial evaporation process,elucidating the interactions between heat,water,and salt during evaporation.Additionally,the internal water channels of the evaporator are optimized and designed using topology optimization techniques.In this project,a cylindrical evaporator model with vertical micropores is developed from carbon-based polymer materials.The impact of pore diameter and spacing on the evaporation rate is analyzed,alongside the effects of thermal conductivity,solar radiation intensity,and ambient wind speed on the evaporator's performance.Simulations have revealed that with a pore diameter of 20μm and a spacing of 0.55 mm,the evaporator achieves the highest evaporation rate of 0.91 kg·m^(-2)·h^(-1).The findings indicate that smaller pore sizes substantially enhance the evaporation rate,while larger pore spacings initially increase,and then decrease the rate.Further optimization involves using 20μm-diameter round pores and adjusting the cross-sectional shapes of the pores based on topological configurations with a material volume factor of 0.5.The optimized structure demonstrates an evaporation rate of 2.91 kg·m^(-2)·h^(-1),representing a 219.78%increase over the unoptimized design.These optimized structures and simulation results provide valuable insights for future evaporator designs.展开更多
The interfacial solar evaporator is a key technology for eco-friendly desalination,playing a crucial role in alleviating the global water scarcity crisis.However,limitation of photothermal water evaporation efficiency...The interfacial solar evaporator is a key technology for eco-friendly desalination,playing a crucial role in alleviating the global water scarcity crisis.However,limitation of photothermal water evaporation efficiency persists due to inadequate water transfer at the water-steam interface.Herein,we present a new type of scalable and recyclable arch bridge photothermal fabric with efficient warp-direction water paths by a convenient shuttle-flying weaving technique.Compared to the previous overall layer-by-layer assembled fabric,our photothermal fabric precisely constructed effective water paths and achieved excellent water-heat distribution at the solar evaporation interface,which greatly improved the photothermal conversion efficiency and evaporation rate.By the design of the weaving process,the photothermal fabric shows a new interface contact mode of the water path fiber and polyaniline photothermal fiber.Besides,the arch-bridge type design not only minimizes heat loss area but also enhances the water evaporation area,resulting in high-efficiency all-weather available solar water evaporation.Furthermore,the results show that the temperature,evaporation rate and solar-vapor conversion efficiency of photothermal fabric can reach above 123℃,2.31 kg m^(-2)h^(-1)and 99.93%under a solar illumination of 1 kW m^(-2).The arch-bridge photo-thermal fabric with an excellent water evaporation rate has been successfully established,which provides a new paradigm for improving the sustainable seawater desalination rate.展开更多
Over the last decades,the treatment of the large quantities of hypersaline wastewater generated by conventional industries,inland desalination,and fossil-fueled power plants has been an important economic issue and al...Over the last decades,the treatment of the large quantities of hypersaline wastewater generated by conventional industries,inland desalination,and fossil-fueled power plants has been an important economic issue and also an inescapable green issue.Here,we developed a versatile interfacial heating membrane with alternating utilization of electricity or solar energy for hypersaline water treat-ment.This hierarchical membrane functions both as a separation membrane and an interface heater,which can quickly(<0.1 s)convert electricity or solar energy into heat to evaporate the outermost layer of hypersaline water.For 10wt% hyper-saline water,the freshwater production rate can reach 16.8kg/m^(2)⋅h by applying a voltage of 10 V and 1.36 kg/m^(2)⋅h under 1-sun illumination.Moreover,it exhibits high electrochemical resistance to corrosion and therefore remains stable tack-ling hypersaline water(>5 wt%),with a high salt rejection rate of 99.99%.This system shows an efficient desalination strategy that can provide fresh water from brines for agriculture and industry,and even for daily life.展开更多
基金financially supported by the National Natural Science Foundation of China(12,405,179)the Natural Science Foundation of Hunan Province(2023JJ40744)+1 种基金the Natural Science Foundation of Hunan Province(2025JJ50227)the High Performance Computing Center of Central South University(2025JJ50226).
文摘The solar interfacial evaporation has a broad application prospect in the fields of steam generation and seawater desalination to deal with the global shortage of fresh-water resources.Bamboo is a great material for solar interface evaporators because of its low thermal conductivity and inherent micro-channel porous structure.In this paper,a novel bamboo-based solar interface evaporator with a bionic ripple wave surface structure has been proposed.The subsequent evaporation experiments have been conducted to investigate the salt resistance,stability and water absorption of the bionic ripple bamboo based solar interface evaporator.The results have exhibited that the bamboo's water absorption has been enhanced after carbonization modification.Besides,it should be pointed out that this bamboo-based evaporator’s evaporation rate has dropped during the prolonged simulated seawater evaporation experiment,yet it remained fairly consistent at approximately 1.626 kg·m^(-2)·h^(-1).The appearance for this experimental phenomenon is the decrease of the floatability of the evaporator constricted by the stored water body absorbed by the evaporator and the deposition of NaCl crystals at the photothermal interface.Besides,compared with the plate-structure evaporator,the salt deposition in the evaporator equipped with the bionic ripple wave surface structure is greatly improved.In regard to its advantages in low cost,environmental friendliness,good salt tolerance and high evaporation rate,the bamboo-based solar interface evaporator with a bionic ripple wave surface structure can provide a potential solution to the global problem of fresh-water shortage.
基金supported by the National Natural Science Foundation of China(52203226)the Fundamental Research Funds for the Central Universities(2232023G-06).
文摘The treatment of ammonia nitrogen wastewater(ANW)has garnered significant attention due to the ecology,and even biology is under increasing threat from over discharge ANW.Conventional ANW treatment methods often encounter challenges such as complex processes,high costs and secondary pollution.Considerable progress has been made in employing solar-induced evaporators for wastewater treatment.However,there remain notable barriers to transitioning from fundamental research to practical applications,including insufficient evaporation rates and inadequate resistance to biofouling.Herein,we propose a novel evaporator,which comprises a bio-enzyme-treated wood aerogel that serves as water pumping and storage layer,a cost-effective multi-walled carbon nanotubes coated hydrophobic/hydrophilic fibrous nonwoven mat functioning as photothermal evaporation layer,and aggregation-induced emission(AIE)molecules incorporated as anti-biofouling agent.The resultant bioinspired evaporator demonstrates a high evaporation rate of 12.83 kg m^(−2) h^(−1) when treating simulated ANW containing 30 wt%NH4Cl under 1.0 sun of illumination.AIE-doped evaporator exhibits remarkable photodynamic antibacterial activity against mildew and bacteria,ensuring outstanding resistance to biofouling over extended periods of wastewater treatment.When enhanced by natural wind under 1.0 sun irradiation,the evaporator achieves an impressive evaporation rate exceeding 20 kg m^(−2) h^(−1) .This advancement represents a promising and viable approach for the effective removal of ammonia nitrogen wastewater.
基金supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2024D01C214 and 2024D01C213)the Key Research and Development Special Task Project of Xinjiang(2023B02045-3)PhD Start-Up Fund of Xinjiang University(620323016)。
文摘Although the application of solar-driven interfacial evaporation technology in the field of seawater desalination has seen rapid progress in recent years,mediocre water evaporation rates remain a longstanding bottleneck.The key to resolving this bottleneck is leveraging strong hydrogen bonding to reduce the enthalpy of evaporation for water molecules and inputting environmental energy.This study presents a novel approach for reducing the enthalpy of vaporization by introducing a hydrophilic inorganic material Al(H2PO4)3(AP)on the surface of cellulose nanofibers(CNF)to form an inorganic‒organic hydrogen-bonded network in cellulose-based hydrogels(labeled 3DL Metagel).This network structure accelerates the diffusion of water molecules between CNF,as confirmed by molecular dynamics simulations.Specifically,inspired by multiple biological traits found in nature,the 3DL Metagel evaporator integrates a lotus shape,Janus wettability(the superhydrophilic lotus-like flower with hydrophobic lotus-like leaves)and plant transpiration,resulting in superior water evaporation rates of up to 3.61 kg・m^(−2)・h^(−1) under 1.0 solar radiation(exceeding the limit of two-dimensional evaporators).The unique lotus shape enables 3DL Metagel to draw additional energy from the environment during desalination,resulting in a maximum water evaporation efficiency of 94.94%.The dual porous structure with Janus wettability endows the evaporator with self-floating ability and a unidirectional salt ion reflux channel during the evaporation process,providing a salt-resistant technology for seawater desalination.Noteworthy,evaporator can be used for efficient outdoor water purification in arid areas with extremely low humidity and is biodegradable and biocompatible.The integration of an inorganic‒organic hydrogen-bonded crosslinked network and biomimetic features achieves high-efficiency photothermal water evaporation,offering novel insights for the rational design of efficient evaporators for solar desalination and wastewater purification.
基金supported by the National Natural Science Foundation of China(No.52476064,No.52106085)National Key Research and Development Program of China(No.2022YFE0210200)+2 种基金China Postdoctoral Science Foundation(No.2023T160164)Natural Science Foundation of Heilongjiang Province(No.LH2023E043)Fundamental Research Funds for the Central Universities(No.2022ZFJH04,No.HIT.OCEF.2023021)。
文摘Solar-driven interfacial water evaporation technology offers a zero-carbon,sustainable solution for extracting clean water from seawater and wastewater,presenting an effective strategy to address the global water crisis.This study has employed finite element simulation to investigate the solar interfacial evaporation process,elucidating the interactions between heat,water,and salt during evaporation.Additionally,the internal water channels of the evaporator are optimized and designed using topology optimization techniques.In this project,a cylindrical evaporator model with vertical micropores is developed from carbon-based polymer materials.The impact of pore diameter and spacing on the evaporation rate is analyzed,alongside the effects of thermal conductivity,solar radiation intensity,and ambient wind speed on the evaporator's performance.Simulations have revealed that with a pore diameter of 20μm and a spacing of 0.55 mm,the evaporator achieves the highest evaporation rate of 0.91 kg·m^(-2)·h^(-1).The findings indicate that smaller pore sizes substantially enhance the evaporation rate,while larger pore spacings initially increase,and then decrease the rate.Further optimization involves using 20μm-diameter round pores and adjusting the cross-sectional shapes of the pores based on topological configurations with a material volume factor of 0.5.The optimized structure demonstrates an evaporation rate of 2.91 kg·m^(-2)·h^(-1),representing a 219.78%increase over the unoptimized design.These optimized structures and simulation results provide valuable insights for future evaporator designs.
基金supported by the Research Initiated Project of Chengdu University(2081921027)the Key Laboratory of Materials and Surface Technology,Ministry of Education(NO.xxx-2023-yb010)+2 种基金the Bureau of Science&Technology and Intellectual Property Nanchong City(22SXZRKX0017)the North Sichuan Medical College(CBY22-ZDA07,CBY21-QD-04)National Natural Science Foundation of China(52205182).
文摘The interfacial solar evaporator is a key technology for eco-friendly desalination,playing a crucial role in alleviating the global water scarcity crisis.However,limitation of photothermal water evaporation efficiency persists due to inadequate water transfer at the water-steam interface.Herein,we present a new type of scalable and recyclable arch bridge photothermal fabric with efficient warp-direction water paths by a convenient shuttle-flying weaving technique.Compared to the previous overall layer-by-layer assembled fabric,our photothermal fabric precisely constructed effective water paths and achieved excellent water-heat distribution at the solar evaporation interface,which greatly improved the photothermal conversion efficiency and evaporation rate.By the design of the weaving process,the photothermal fabric shows a new interface contact mode of the water path fiber and polyaniline photothermal fiber.Besides,the arch-bridge type design not only minimizes heat loss area but also enhances the water evaporation area,resulting in high-efficiency all-weather available solar water evaporation.Furthermore,the results show that the temperature,evaporation rate and solar-vapor conversion efficiency of photothermal fabric can reach above 123℃,2.31 kg m^(-2)h^(-1)and 99.93%under a solar illumination of 1 kW m^(-2).The arch-bridge photo-thermal fabric with an excellent water evaporation rate has been successfully established,which provides a new paradigm for improving the sustainable seawater desalination rate.
基金National Key R&D Program of China,Grant/Award Number:2018YFA0209500National Natural Science Foundation of China,Grant/Award Numbers:21621091,21975209,52025132。
文摘Over the last decades,the treatment of the large quantities of hypersaline wastewater generated by conventional industries,inland desalination,and fossil-fueled power plants has been an important economic issue and also an inescapable green issue.Here,we developed a versatile interfacial heating membrane with alternating utilization of electricity or solar energy for hypersaline water treat-ment.This hierarchical membrane functions both as a separation membrane and an interface heater,which can quickly(<0.1 s)convert electricity or solar energy into heat to evaporate the outermost layer of hypersaline water.For 10wt% hyper-saline water,the freshwater production rate can reach 16.8kg/m^(2)⋅h by applying a voltage of 10 V and 1.36 kg/m^(2)⋅h under 1-sun illumination.Moreover,it exhibits high electrochemical resistance to corrosion and therefore remains stable tack-ling hypersaline water(>5 wt%),with a high salt rejection rate of 99.99%.This system shows an efficient desalination strategy that can provide fresh water from brines for agriculture and industry,and even for daily life.
