Water pollution is an increasingly serious environmental problem because many pollutants have carcinogenic effects on humans and aquatic organisms.Metal organic framework(MOF),made up of metal ions and multifunctional...Water pollution is an increasingly serious environmental problem because many pollutants have carcinogenic effects on humans and aquatic organisms.Metal organic framework(MOF),made up of metal ions and multifunctional organic ligands,has been one of the most concerned materials because of its adjustable and regular pore structure.MOFs have always shown attractive advantages in membrane separation and adsorption technologies,among which water-stable MOFs are particularly prominent in wastewater treatment(WWT)applications.This review systematically summarizes the application of MOF membranes in membrane filtration,membrane pervaporation and membrane distillation.Also,the adsorption mechanisms of heavy metals,dyes and antibacterials in wastewater have been concluded.In order to tap the full application potential of pristine MOFs in sustainable wastewater treatment,current challenges are discussed in detail and future research directions are proposed.展开更多
In order to further improve the potential application of nickel-cobalt oxide(NiCoO)in supercapacitors,we use controlled calcination of diffe rent Ni-Co-MOF([NiCo(HBTC)(4,4’-bipy)])composites to obtain five kinds of n...In order to further improve the potential application of nickel-cobalt oxide(NiCoO)in supercapacitors,we use controlled calcination of diffe rent Ni-Co-MOF([NiCo(HBTC)(4,4’-bipy)])composites to obtain five kinds of nickel doped NiCoO(N-NiCoO)with different Ni/Co molar ratio.These N-NiCoO materials with unique hexagonal nanoplates structure,high specific surface area and high porosity indicate high and stable electrochemical activity.In particular,N-NiCoO-2 with a Ni/Co molar ratio of 2:1 exhibits the highest 945.79 F/g specific capacitance at 1 A/g and a high cycle stability of only 6.7%attenuation after 5000 cycles.Apart from the certain percentage of NiCoO with higher conductivity,nitrogen doping provides more reactive sites and the specific porous hexagonal nanoplates structure of the product itself accelerate electron transfer and promote electrolyte diffusion can more effectively enhance the electrochemical performance.Therefore,N-NiCoO synthesized via a simple method exhibit exciting potential and can be used as an electrode material for supercapacitors with good performance.展开更多
Metal–organic frameworks(MOFs),which are generally considered to be crystalline materials comprising metal centers and organic ligands,have attracted growing attention because of their controllable structures and hig...Metal–organic frameworks(MOFs),which are generally considered to be crystalline materials comprising metal centers and organic ligands,have attracted growing attention because of their controllable structures and high porosity.MOFs based on transition metals(Fe,Co,Ni)are highly effi cient electrode materials for electrochemical energy storage.In this review,the characteristics of Fe-MOFs,Co-MOFs,Ni-MOFs,and their derivatives are summarized,and the relationships between the structures and performance are unveiled in depth.Additionally,their applications in lithium–ion batteries,lithium–sulfur batteries,and supercapacitors are discussed.This review sheds light on the development of MOFs and their derivatives to realize excellent electrochemical performance.展开更多
Metal-organic frameworks(MOFs)as promising electrodes for supercapacitors are attracting increasing research interest.Herein,we report an effective strategy to improve the electrochemical performance of Ni-MOF for sup...Metal-organic frameworks(MOFs)as promising electrodes for supercapacitors are attracting increasing research interest.Herein,we report an effective strategy to improve the electrochemical performance of Ni-MOF for supercapacitor by introducing a secondary Co ion.The Co substitution of Ni in Ni-MOF can improve the intrinsic reactivity and stability.As a result,the bimetallic Co/Ni-MOF-1:15 with an optimal Co/Ni ratio delivers high specific capacitance(359 F/g at 0.5 A/g),good rate performance(81.5%retention at 5 A/g)and cycling stability(81%retention after 5000 cycles).These results demonstrate that the bimetallic synergistic strategy is an effective way to improve the pseudocapacitive performance of MOFs.展开更多
基金supported by the National Natural Science Foundation of China(NSFC-U1904215)Natural Science Foundation of Jiangsu Province(BK20200044)Changjiang scholars program of the Ministry of Education(Q2018270).
文摘Water pollution is an increasingly serious environmental problem because many pollutants have carcinogenic effects on humans and aquatic organisms.Metal organic framework(MOF),made up of metal ions and multifunctional organic ligands,has been one of the most concerned materials because of its adjustable and regular pore structure.MOFs have always shown attractive advantages in membrane separation and adsorption technologies,among which water-stable MOFs are particularly prominent in wastewater treatment(WWT)applications.This review systematically summarizes the application of MOF membranes in membrane filtration,membrane pervaporation and membrane distillation.Also,the adsorption mechanisms of heavy metals,dyes and antibacterials in wastewater have been concluded.In order to tap the full application potential of pristine MOFs in sustainable wastewater treatment,current challenges are discussed in detail and future research directions are proposed.
基金supported by the National Natural Science Foundation of China(NSFC,Nos.21671170,21673203,21201010 and U1904215)the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP)+2 种基金Program for New Century Excellent Talents of the University in China(NCET,No.13-0645)the Six Talent Plan(No.2015-XCL-030)Qinglan Project。
文摘In order to further improve the potential application of nickel-cobalt oxide(NiCoO)in supercapacitors,we use controlled calcination of diffe rent Ni-Co-MOF([NiCo(HBTC)(4,4’-bipy)])composites to obtain five kinds of nickel doped NiCoO(N-NiCoO)with different Ni/Co molar ratio.These N-NiCoO materials with unique hexagonal nanoplates structure,high specific surface area and high porosity indicate high and stable electrochemical activity.In particular,N-NiCoO-2 with a Ni/Co molar ratio of 2:1 exhibits the highest 945.79 F/g specific capacitance at 1 A/g and a high cycle stability of only 6.7%attenuation after 5000 cycles.Apart from the certain percentage of NiCoO with higher conductivity,nitrogen doping provides more reactive sites and the specific porous hexagonal nanoplates structure of the product itself accelerate electron transfer and promote electrolyte diffusion can more effectively enhance the electrochemical performance.Therefore,N-NiCoO synthesized via a simple method exhibit exciting potential and can be used as an electrode material for supercapacitors with good performance.
基金supported by the National Natural Science Foundation of China (Nos. NSFC-U1904215)the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)+2 种基金the Natural Science Foundation of Jiangsu Province (No. BK20200044)Program for Young Changjiang Scholars of the Ministry of Education,China (No. Q2018270)the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Metal–organic frameworks(MOFs),which are generally considered to be crystalline materials comprising metal centers and organic ligands,have attracted growing attention because of their controllable structures and high porosity.MOFs based on transition metals(Fe,Co,Ni)are highly effi cient electrode materials for electrochemical energy storage.In this review,the characteristics of Fe-MOFs,Co-MOFs,Ni-MOFs,and their derivatives are summarized,and the relationships between the structures and performance are unveiled in depth.Additionally,their applications in lithium–ion batteries,lithium–sulfur batteries,and supercapacitors are discussed.This review sheds light on the development of MOFs and their derivatives to realize excellent electrochemical performance.
基金supported by the National Natural Science Foundation of China (NSFC, Nos. 21901222, U1904215 and 21671170)Lvyangjinfeng Talent Program of Yangzhou+2 种基金Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)Program for Young Chang Jiang Scholars of the Ministry of Education, China (No. Q2018270)Natural Science Foundation of Jiangsu Province (No. BK20200044)。
文摘Metal-organic frameworks(MOFs)as promising electrodes for supercapacitors are attracting increasing research interest.Herein,we report an effective strategy to improve the electrochemical performance of Ni-MOF for supercapacitor by introducing a secondary Co ion.The Co substitution of Ni in Ni-MOF can improve the intrinsic reactivity and stability.As a result,the bimetallic Co/Ni-MOF-1:15 with an optimal Co/Ni ratio delivers high specific capacitance(359 F/g at 0.5 A/g),good rate performance(81.5%retention at 5 A/g)and cycling stability(81%retention after 5000 cycles).These results demonstrate that the bimetallic synergistic strategy is an effective way to improve the pseudocapacitive performance of MOFs.
