Tailoring water supply to achieve confined heating has proven to be an effective strategy for boosting solar interfacial evaporation rates.However,because of salt clogging during desalination,a critical point of const...Tailoring water supply to achieve confined heating has proven to be an effective strategy for boosting solar interfacial evaporation rates.However,because of salt clogging during desalination,a critical point of constriction occurs when controlling the water rate for confined heating.In this study,we demonstrate a facile and scalable weaving technique for fabricating core-sheath photothermal yarns that facilitate controlled water supply for stable and efficient interracial solar desalination.The core-sheath yarn comprises modal fibers as the core and carbon fibers as the sheaths.Because of the core-sheath design,remarkable liquid pumping can be enabled in the carbon fiber bundle of the dispersed superhydrophilic modal fibers.Our woven fabrics absorb a high proportion(92%)of the electromagnetic radiation in the solar spectrum because of the weaving structure and the carbon fiber sheath.Under one-sun(1 kW·m^(-2))illumination,our woven fabric device can achieve the highest evaporation rate(of 2.12kg·m^(-2)·h^(-1) with energy conversion efficiency:93.7%)by regulating the number of core-sheath yarns.Practical application tests demonstrate that our device can maintain high and stable desalination performance in a 5 wt%NaCl solution.展开更多
Solar-driven interfacial evaporation has been considered as a promising approach for treating high-salinity brine,which mitigates ecological pollution as well as produces fresh water.Despite the extensive research eff...Solar-driven interfacial evaporation has been considered as a promising approach for treating high-salinity brine,which mitigates ecological pollution as well as produces fresh water.Despite the extensive research efforts,challenges remain regarding the stably high-yield solar treatment of high-salinity water on a large scale.Here,we demonstrate an interconnected porous fabric-based scalable evaporator with asymmetric wetting properties fabricated by weaving technique for high-efficiency and salt-rejecting solar high-salinity brine treatment.Three-dimensional interconnected micropores ensure effective convection-induced fast vapor diffusion,leading to a high evaporation rate in the natural environment with the convective flow.The Janus structure effectively separates absorption and evaporation surfaces for stable salt resistance even under fast evaporation.It is observed that the evaporator achieves a high evaporation rate of 2.48 kg m^(-2)h^(-1)under 1-sun illumination and airflow of 3 m s^(-1)when treating 15 wt%saline.Notably,the outdoor experiment demonstrates that there is neither salt precipitation on the surface nor a decrement in evaporation rate during the 5-day evaporation until water and solute have completely been separated.The interconnected porous fabric with asymmetric wetting properties can be easily and massively produced by industrialized weaving techniques,showing great potential for scalable and efficient solar water treatment of high-salinity brine and industrial wastewater.展开更多
基金financial support from the National Natural Science Foundation of China(52103064 and U21A2095)the Key Research and Development Program of Hubei Province(2021BAA068)National Local Joint Laboratory for Advanced Textile Processing and Clean Production(FX2022001)。
文摘Tailoring water supply to achieve confined heating has proven to be an effective strategy for boosting solar interfacial evaporation rates.However,because of salt clogging during desalination,a critical point of constriction occurs when controlling the water rate for confined heating.In this study,we demonstrate a facile and scalable weaving technique for fabricating core-sheath photothermal yarns that facilitate controlled water supply for stable and efficient interracial solar desalination.The core-sheath yarn comprises modal fibers as the core and carbon fibers as the sheaths.Because of the core-sheath design,remarkable liquid pumping can be enabled in the carbon fiber bundle of the dispersed superhydrophilic modal fibers.Our woven fabrics absorb a high proportion(92%)of the electromagnetic radiation in the solar spectrum because of the weaving structure and the carbon fiber sheath.Under one-sun(1 kW·m^(-2))illumination,our woven fabric device can achieve the highest evaporation rate(of 2.12kg·m^(-2)·h^(-1) with energy conversion efficiency:93.7%)by regulating the number of core-sheath yarns.Practical application tests demonstrate that our device can maintain high and stable desalination performance in a 5 wt%NaCl solution.
基金supported by the National Key Research and Development Program of China(no.2022YFB3804902)National Natural Science Foundation of China(nos.52102262,52103064,52303323,52322211,U21A2095)+2 种基金Natural Science Foundation of Jiangsu Province(no.BK20200340)the Natural Science Foundation of Hubei Province(nos.2023AFB265 and 2020CFA022)State Key Laboratory of New Textile Materials and Advanced Processing Technology(nos.FZ2021004,FZ20230021).
文摘Solar-driven interfacial evaporation has been considered as a promising approach for treating high-salinity brine,which mitigates ecological pollution as well as produces fresh water.Despite the extensive research efforts,challenges remain regarding the stably high-yield solar treatment of high-salinity water on a large scale.Here,we demonstrate an interconnected porous fabric-based scalable evaporator with asymmetric wetting properties fabricated by weaving technique for high-efficiency and salt-rejecting solar high-salinity brine treatment.Three-dimensional interconnected micropores ensure effective convection-induced fast vapor diffusion,leading to a high evaporation rate in the natural environment with the convective flow.The Janus structure effectively separates absorption and evaporation surfaces for stable salt resistance even under fast evaporation.It is observed that the evaporator achieves a high evaporation rate of 2.48 kg m^(-2)h^(-1)under 1-sun illumination and airflow of 3 m s^(-1)when treating 15 wt%saline.Notably,the outdoor experiment demonstrates that there is neither salt precipitation on the surface nor a decrement in evaporation rate during the 5-day evaporation until water and solute have completely been separated.The interconnected porous fabric with asymmetric wetting properties can be easily and massively produced by industrialized weaving techniques,showing great potential for scalable and efficient solar water treatment of high-salinity brine and industrial wastewater.
