Technologies for evaporation-driven electricity generation and solar-driven steam generation exhibit significant potential for addressing energy crises and freshwater shortages.Nevertheless,it is still a challenge to ...Technologies for evaporation-driven electricity generation and solar-driven steam generation exhibit significant potential for addressing energy crises and freshwater shortages.Nevertheless,it is still a challenge to develop multifunctional materials for efficient energy generation and seawater desalination via economical and simple methods.Here,we propose a Chinese ink-coated viscose fiber composite(Ink@VF),suitable for direct applications in evaporation-driven electricity generators(EEGs)and solar-driven steam generators(SSGs).The Ink@VF prepared by a simple dip-dyeing method exhibits excellent mechanical properties(Young’s modulus of 18.1 GPa),hydrophilicity,electrical conductivity(36.51Ω/sq),and photothermal conversion properties.Based on the synergy of water evaporation,capillary effect,and electric double layer(EDL)electrokinetic effect,the Ink@VF-based EEG can achieve a maximum open-circuit voltage(V_(oc))of 0.65 V and an optimal power density of 43.72 mW/m^(2)with 1 mol/L NaCl solution.It can also be integrated in series to develop a self-powered bracelet.Simultaneously,the evaporation rate and solar energy conversion efficiency of the Ink@VF-based SSG can reach 1.32 kg/(m^(2)·h)and 84.9%under 1 sun irradiation,respectively.Through utilizing the evaporation-condensation mechanism,it can achieve freshwater generation at a rate of 1.49 kg/(m^(2)·h)and metal ion removal in excess of 99.9%.This study provides a low-cost and efficient solution to the energy crisis and freshwater shortage in resource-poor remote areas by utilizing inexhaustible natural resources.展开更多
Gas-liquid interfacial films have emerged as versatile materials for surface modification in biomedical applications,agriculture,and antifouling owing to their strong substrate-bonding capabilities.Silk nanofibrils(SN...Gas-liquid interfacial films have emerged as versatile materials for surface modification in biomedical applications,agriculture,and antifouling owing to their strong substrate-bonding capabilities.Silk nanofibrils(SNF),as nanoscale building blocks of silk,exhibit exceptional mechanical stability,high crystallinity,and aqueous adaptability,making them ideal candidates for fabricating interfacial films.However,conventional fabrication methods for SNF-or protein-based interfacial films often involve complex and resource-intensive chemical processes.To overcome these challenges,this study introduces a simple and efficient strategy for preparing thermally induced SNF gas-liquid interfacial films via heat treatment,leveraging thermal evaporation-induced concentration to drive self-assembly.The method demonstrated broad applicability to various proteins and hydrophilic substrates,offering versatility and sustainability.Furthermore,the prepared films exhibited potential as antifouling and anti-counterfeiting functional coatings,significantly expanding the application scenarios of protein-based interfacial films.展开更多
Subject code:E02 With the support by the National Natural Science Foundation of China,a collaborative study by the research group led by Prof.Zhou Jun(周军)from Wuhan National Laboratory for Optoelectronics,Huazhong U...Subject code:E02 With the support by the National Natural Science Foundation of China,a collaborative study by the research group led by Prof.Zhou Jun(周军)from Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Prof.Guo Wanlin(郭万林)from Nanjing University展开更多
The interfacial solar steam generation and water evaporation-driven power generation are regarded as promising strategies to address energy crisis.However,it remains challenging to construct low-cost evaporators for f...The interfacial solar steam generation and water evaporation-driven power generation are regarded as promising strategies to address energy crisis.However,it remains challenging to construct low-cost evaporators for freshwater and electricity co-generation.Herein,we report a salt-assisted carbonization strategy of waste polylactic acid to prepare Hydrangea flower-like graphene and build a bi-functional graphene-based evaporator.The evaporator presents merits of good sunlight absorption,photo-to-thermal conversion property,water transport,good thermal management capability,and negatively charged pores for the continuous diffusion of ions.Hence,it achieves the evaporation rate of 3.0 kg m^(−2)h^(−1)and output voltage of 0.425 V,surpassing many advanced evaporators/generators.Molecular dynamics simulation result proves that more Na^(+)ions are attracted by functional groups,especially-COOH/C-OH,to promote Na^(+)selectivity in nanochannels.This work offers new opportunities to construct multifunctional evaporators for freshwater and electricity co-generation.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52103138 and 52201043)the Natural Science Foundation of Fujian Province(Nos.2022J01945 and 2023J01159)+1 种基金the STS Project of Fujian-CAS(No.2023T3043)College Students Innovation and Entrepreneurship Training Program of China(No.202410388011).
文摘Technologies for evaporation-driven electricity generation and solar-driven steam generation exhibit significant potential for addressing energy crises and freshwater shortages.Nevertheless,it is still a challenge to develop multifunctional materials for efficient energy generation and seawater desalination via economical and simple methods.Here,we propose a Chinese ink-coated viscose fiber composite(Ink@VF),suitable for direct applications in evaporation-driven electricity generators(EEGs)and solar-driven steam generators(SSGs).The Ink@VF prepared by a simple dip-dyeing method exhibits excellent mechanical properties(Young’s modulus of 18.1 GPa),hydrophilicity,electrical conductivity(36.51Ω/sq),and photothermal conversion properties.Based on the synergy of water evaporation,capillary effect,and electric double layer(EDL)electrokinetic effect,the Ink@VF-based EEG can achieve a maximum open-circuit voltage(V_(oc))of 0.65 V and an optimal power density of 43.72 mW/m^(2)with 1 mol/L NaCl solution.It can also be integrated in series to develop a self-powered bracelet.Simultaneously,the evaporation rate and solar energy conversion efficiency of the Ink@VF-based SSG can reach 1.32 kg/(m^(2)·h)and 84.9%under 1 sun irradiation,respectively.Through utilizing the evaporation-condensation mechanism,it can achieve freshwater generation at a rate of 1.49 kg/(m^(2)·h)and metal ion removal in excess of 99.9%.This study provides a low-cost and efficient solution to the energy crisis and freshwater shortage in resource-poor remote areas by utilizing inexhaustible natural resources.
基金financially supported by the National Natural Science Foundation of China(No.21935002)。
文摘Gas-liquid interfacial films have emerged as versatile materials for surface modification in biomedical applications,agriculture,and antifouling owing to their strong substrate-bonding capabilities.Silk nanofibrils(SNF),as nanoscale building blocks of silk,exhibit exceptional mechanical stability,high crystallinity,and aqueous adaptability,making them ideal candidates for fabricating interfacial films.However,conventional fabrication methods for SNF-or protein-based interfacial films often involve complex and resource-intensive chemical processes.To overcome these challenges,this study introduces a simple and efficient strategy for preparing thermally induced SNF gas-liquid interfacial films via heat treatment,leveraging thermal evaporation-induced concentration to drive self-assembly.The method demonstrated broad applicability to various proteins and hydrophilic substrates,offering versatility and sustainability.Furthermore,the prepared films exhibited potential as antifouling and anti-counterfeiting functional coatings,significantly expanding the application scenarios of protein-based interfacial films.
文摘Subject code:E02 With the support by the National Natural Science Foundation of China,a collaborative study by the research group led by Prof.Zhou Jun(周军)from Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Prof.Guo Wanlin(郭万林)from Nanjing University
基金National Natural Science Foundation of China,Grant/Award Number:52373099Innovation and Talent Recruitment Base of New Energy Chemistry and Device,Grant/Award Number:B21003+1 种基金HUSTShiyanjia Lab。
文摘The interfacial solar steam generation and water evaporation-driven power generation are regarded as promising strategies to address energy crisis.However,it remains challenging to construct low-cost evaporators for freshwater and electricity co-generation.Herein,we report a salt-assisted carbonization strategy of waste polylactic acid to prepare Hydrangea flower-like graphene and build a bi-functional graphene-based evaporator.The evaporator presents merits of good sunlight absorption,photo-to-thermal conversion property,water transport,good thermal management capability,and negatively charged pores for the continuous diffusion of ions.Hence,it achieves the evaporation rate of 3.0 kg m^(−2)h^(−1)and output voltage of 0.425 V,surpassing many advanced evaporators/generators.Molecular dynamics simulation result proves that more Na^(+)ions are attracted by functional groups,especially-COOH/C-OH,to promote Na^(+)selectivity in nanochannels.This work offers new opportunities to construct multifunctional evaporators for freshwater and electricity co-generation.
