Solid polymer composite electrolytes possess the benefits of superior compatibility with electrodes and good thermal characteristics for more secure energy storage equipment.Herein,a new gel polymer electrolyte(GPE)co...Solid polymer composite electrolytes possess the benefits of superior compatibility with electrodes and good thermal characteristics for more secure energy storage equipment.Herein,a new gel polymer electrolyte(GPE)containing NH_(2)-MIL-53(Al),[PP_(13)][TFSI],LiTFSI,and PVDF-HFP was prepared using a simple method of solution casting.The effects of encapsulating different ratios of ionic liquid([PP_(13)][TFSI])into the micropores of functionalized metal-organic frameworks(NH_(2)-MIL-53(Al))on the electrochemical properties were compared.XRD,SEM,nitrogen adsorption-desorption isotherms,and electrochemical measurements were conducted.This GPE demonstrates a superior ionic conductivity of 8.08×10^(-4)S·cm^(-1)at 60℃and can sustain a discharge specific capacity of 156.6 mA·h·g^(-1)at 0.2 C for over 100 cycles.This work might offer a potential approach to alleviate the solid-solid contact with the solid-state electrolyte and electrodes and broaden a new window for the creation of all-solid-state batteries.展开更多
To address the limitations of the separate fluoride removal or detection in the existing materials,herein,amino-decorated metal organic frameworks NH_(2)-MIL-53(Al)have been succinctly fabricated by a sol-hydrothermal...To address the limitations of the separate fluoride removal or detection in the existing materials,herein,amino-decorated metal organic frameworks NH_(2)-MIL-53(Al)have been succinctly fabricated by a sol-hydrothermal method for simultaneous removal and determination of fluoride.As a consequence,the proposed NH_(2)-MIL-53(Al)features high uptake capacity(202.5 mg/g)as well as fast adsorption rate,being capable of treating 5 ppm of fluoride solution to below the permitted threshold in drinking water within 15 min.Specifically,the specific binding between fluoride and NH_(2)-MIL-53(Al)results in the release of fluorescent ligand NH2-BDC,conducive to the determination of fluoride via a concentration-dependent fluorescence enhancement effect.As expected,the resulting NH_(2)-MIL-53(Al)sensor exhibits selective and sensitive detection(with the detection limit of 0.31μmol/L)toward fluoride accompanied with a wide response interval(0.5-100μmol/L).More importantly,the developed sensor can be utilized for fluoride detection in practical water systems with satisfying recoveries from 89.6% to 116.1%,confirming its feasibility in monitoring the practical fluoride-contaminated waters.展开更多
A postsynthetic modification method was used to prepare salicylaldehyde functionalized metal-organicframeworks through the nucleophilic addition of salicylaldehyde with the amine group present in the frameworks ofNH2-...A postsynthetic modification method was used to prepare salicylaldehyde functionalized metal-organicframeworks through the nucleophilic addition of salicylaldehyde with the amine group present in the frameworks ofNH2-MIL-53（A1）. Hydroxyl groups were successfully grafted onto NI-I2-MIL-53（A1）, and imine groups were formed.Importantly, these hydroxyl and imine groups of the resulting NH2-MIL-53（A1）-SA can be used as the anchoringgroup to stabilise Au^3＋ ions and Au^0 nanoparticles（NPs）. By doing this, Au^3＋ ions and Au^0 NPs were successfully en-capsulated in the cages of NH2-MIL-53（A1） by a simple impregnation method. The resulting gold functionalizedNH2-MIL-53（AI） showed good catalytic activities in the one-pot synthesis of structurally divergent propargylaminesby three-component coupling reactions of aldehydes, amines and alkynes. Various aromatic/aliphatic aldehydes, aro-matic alkynes, and piperidine were able to undergo three-component coupling on NH2-MIL-53（A1）-Au. In addition,the catalyst NH2-M/L-53（A/）-Au was recovered easily by centrifugation and reused up to four times. Thus, it can beused for the environmentally friendly synthesis ofpropargylamines.展开更多
Nanometer blocks of amide-functionalized Fe(Ⅲ)-based metal-organic frameworks,NH2-MIL-53(Fe),were prepared via ultrasonic method without any surfactants at room temperature and atmospheric pressure.The characterizati...Nanometer blocks of amide-functionalized Fe(Ⅲ)-based metal-organic frameworks,NH2-MIL-53(Fe),were prepared via ultrasonic method without any surfactants at room temperature and atmospheric pressure.The characterization for the as-prepared nano-structured MOFs was established by XRD,SEM,TEM,XPS and N2 adsorption-desorption.The as-prepared sample with high specific surface area(179.9 m^(2)·g^(-1))showed excellent adsorption for methylene blue in the liquid phase.The as-prepared NH_(2)-MIL-53(Fe)adsorbent seems to be a promising material in practice for organic dye removal from aqueous solution.展开更多
基金financially supported by National Natural Science Foundation of China(21701083)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX20_3137)。
文摘Solid polymer composite electrolytes possess the benefits of superior compatibility with electrodes and good thermal characteristics for more secure energy storage equipment.Herein,a new gel polymer electrolyte(GPE)containing NH_(2)-MIL-53(Al),[PP_(13)][TFSI],LiTFSI,and PVDF-HFP was prepared using a simple method of solution casting.The effects of encapsulating different ratios of ionic liquid([PP_(13)][TFSI])into the micropores of functionalized metal-organic frameworks(NH_(2)-MIL-53(Al))on the electrochemical properties were compared.XRD,SEM,nitrogen adsorption-desorption isotherms,and electrochemical measurements were conducted.This GPE demonstrates a superior ionic conductivity of 8.08×10^(-4)S·cm^(-1)at 60℃and can sustain a discharge specific capacity of 156.6 mA·h·g^(-1)at 0.2 C for over 100 cycles.This work might offer a potential approach to alleviate the solid-solid contact with the solid-state electrolyte and electrodes and broaden a new window for the creation of all-solid-state batteries.
基金supported by the National Key R&D Program of China(No.2017YFA0207202)the National Natural Science Foundation of China(No.51572263,No.51772299,No.41701259).
文摘To address the limitations of the separate fluoride removal or detection in the existing materials,herein,amino-decorated metal organic frameworks NH_(2)-MIL-53(Al)have been succinctly fabricated by a sol-hydrothermal method for simultaneous removal and determination of fluoride.As a consequence,the proposed NH_(2)-MIL-53(Al)features high uptake capacity(202.5 mg/g)as well as fast adsorption rate,being capable of treating 5 ppm of fluoride solution to below the permitted threshold in drinking water within 15 min.Specifically,the specific binding between fluoride and NH_(2)-MIL-53(Al)results in the release of fluorescent ligand NH2-BDC,conducive to the determination of fluoride via a concentration-dependent fluorescence enhancement effect.As expected,the resulting NH_(2)-MIL-53(Al)sensor exhibits selective and sensitive detection(with the detection limit of 0.31μmol/L)toward fluoride accompanied with a wide response interval(0.5-100μmol/L).More importantly,the developed sensor can be utilized for fluoride detection in practical water systems with satisfying recoveries from 89.6% to 116.1%,confirming its feasibility in monitoring the practical fluoride-contaminated waters.
文摘A postsynthetic modification method was used to prepare salicylaldehyde functionalized metal-organicframeworks through the nucleophilic addition of salicylaldehyde with the amine group present in the frameworks ofNH2-MIL-53（A1）. Hydroxyl groups were successfully grafted onto NI-I2-MIL-53（A1）, and imine groups were formed.Importantly, these hydroxyl and imine groups of the resulting NH2-MIL-53（A1）-SA can be used as the anchoringgroup to stabilise Au^3＋ ions and Au^0 nanoparticles（NPs）. By doing this, Au^3＋ ions and Au^0 NPs were successfully en-capsulated in the cages of NH2-MIL-53（A1） by a simple impregnation method. The resulting gold functionalizedNH2-MIL-53（AI） showed good catalytic activities in the one-pot synthesis of structurally divergent propargylaminesby three-component coupling reactions of aldehydes, amines and alkynes. Various aromatic/aliphatic aldehydes, aro-matic alkynes, and piperidine were able to undergo three-component coupling on NH2-MIL-53（A1）-Au. In addition,the catalyst NH2-M/L-53（A/）-Au was recovered easily by centrifugation and reused up to four times. Thus, it can beused for the environmentally friendly synthesis ofpropargylamines.
基金Supported by the Fujian Provincial Key Laboratory of ecotoxicological effects and Control of New pollutants(PY19001)the Innovation and Entrepreneurship training Program for College students in 2019(201910402063)。
文摘Nanometer blocks of amide-functionalized Fe(Ⅲ)-based metal-organic frameworks,NH2-MIL-53(Fe),were prepared via ultrasonic method without any surfactants at room temperature and atmospheric pressure.The characterization for the as-prepared nano-structured MOFs was established by XRD,SEM,TEM,XPS and N2 adsorption-desorption.The as-prepared sample with high specific surface area(179.9 m^(2)·g^(-1))showed excellent adsorption for methylene blue in the liquid phase.The as-prepared NH_(2)-MIL-53(Fe)adsorbent seems to be a promising material in practice for organic dye removal from aqueous solution.
