Metal–organic frameworks(MOFs),owing to their tunable pore environments and abundant hydrogen-bonding sites that enable the formation of continuous transport pathways,are widely regarded as promising candidates for p...Metal–organic frameworks(MOFs),owing to their tunable pore environments and abundant hydrogen-bonding sites that enable the formation of continuous transport pathways,are widely regarded as promising candidates for proton-conducting material.Despite extensive research,most efforts have been devoted to bulk forms,such as powders and single crystals,which are hindered by long diffusion pathways,random orientation,and limited processability,thereby restricting their intergration into device.Recent progress in fabricating high-quality MOF membranes has addressed these challenges,while preserving high proton conductivity.Although notable progress has been achieved,a systematic review of proton-conducting MOF membranes remains absent.In this review,we present a comprehensive overview of proton-conducting MOF membranes,encompassing design strategies,conduction mechanisms,systematic classification,representative fabrication approaches,and their application.Particular emphasis is given to their broader application landscape,extending beyond proton exchange membrane fuel cells to include light-controlled protonic devices,proton sensors,protonic field-effect transistors,and proton rectifiers.By consolidating advances and outlining remaining challenges,this review aims to clarify design principles and guide future research toward integrating MOF membranes into next-generation protonic technologies.展开更多
As a kind of two-dimensional(2D)nanostructured materials,metal oxide nanosheets(MONS)are attractive and promising humidity sensing materials due to their considerable surface area,good charge carrier transportation,an...As a kind of two-dimensional(2D)nanostructured materials,metal oxide nanosheets(MONS)are attractive and promising humidity sensing materials due to their considerable surface area,good charge carrier transportation,and designable surface functional groups properties.Nevertheless,the ultra-thin MONS modified with active functional groups for humidity sensing are still rare.As a proof of concept,the atomically thin TiO_(2)nanosheets with high surface area and electron-donating amino groups are prepared by a structure-maintained post-ligand modification strategy.The fabricated TiO_(2)-based sensors demonstrate superior humidity sensing performance with high response,short response time,narrow hysteresis,and ultra-low theoretical limit of detection of about 15 ppm.Additionally,the possible mechanism is proposed from the AC complex impedance measurements and DC instantaneous reverse polarity experiments.This work provides a possible path for developing the high-performance 2D nanostructured metal oxides-based humidity materials through the surface chemical method.展开更多
基金supported by the National Natural Science Foundation of China(22405274,22325109,22171263,62227815,22494633,22271281,22422508,and 22505265)Self-deployment Project Research Program of Haixi Institutes,Chinese Academy of Sciences(CXZX-2023-GS03 and CXZX-2022-JQ03)+2 种基金China Postdoctoral Science Foundation(GZB20240748,2023M743496,2025M771085,and GZB20250273)the Key Research Project of Chinese Academy of Sciences under Grant(KGFZD-145-25-21)Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1170000).
文摘Metal–organic frameworks(MOFs),owing to their tunable pore environments and abundant hydrogen-bonding sites that enable the formation of continuous transport pathways,are widely regarded as promising candidates for proton-conducting material.Despite extensive research,most efforts have been devoted to bulk forms,such as powders and single crystals,which are hindered by long diffusion pathways,random orientation,and limited processability,thereby restricting their intergration into device.Recent progress in fabricating high-quality MOF membranes has addressed these challenges,while preserving high proton conductivity.Although notable progress has been achieved,a systematic review of proton-conducting MOF membranes remains absent.In this review,we present a comprehensive overview of proton-conducting MOF membranes,encompassing design strategies,conduction mechanisms,systematic classification,representative fabrication approaches,and their application.Particular emphasis is given to their broader application landscape,extending beyond proton exchange membrane fuel cells to include light-controlled protonic devices,proton sensors,protonic field-effect transistors,and proton rectifiers.By consolidating advances and outlining remaining challenges,this review aims to clarify design principles and guide future research toward integrating MOF membranes into next-generation protonic technologies.
基金supported by the National Natural Science Foundation of China(21905280,22171263,91961115,22175176 and 21975254)National Natural Science Foundation of Fujian(2021J02017 and 2020J01109)Youth Innovation Promotion Association CAS。
文摘As a kind of two-dimensional(2D)nanostructured materials,metal oxide nanosheets(MONS)are attractive and promising humidity sensing materials due to their considerable surface area,good charge carrier transportation,and designable surface functional groups properties.Nevertheless,the ultra-thin MONS modified with active functional groups for humidity sensing are still rare.As a proof of concept,the atomically thin TiO_(2)nanosheets with high surface area and electron-donating amino groups are prepared by a structure-maintained post-ligand modification strategy.The fabricated TiO_(2)-based sensors demonstrate superior humidity sensing performance with high response,short response time,narrow hysteresis,and ultra-low theoretical limit of detection of about 15 ppm.Additionally,the possible mechanism is proposed from the AC complex impedance measurements and DC instantaneous reverse polarity experiments.This work provides a possible path for developing the high-performance 2D nanostructured metal oxides-based humidity materials through the surface chemical method.
