As a class of crystalline porous materials,metal-organic frameworks(MOFs)have shown unique advantages in the fields of catalysis,gas storage and separation,but their inherent microporous structure(pore diameter<2 n...As a class of crystalline porous materials,metal-organic frameworks(MOFs)have shown unique advantages in the fields of catalysis,gas storage and separation,but their inherent microporous structure(pore diameter<2 nm)severely limits their application in scenarios such as macromolecular mass transfer and so on.In order to overcome this re-striction,mesoporous MOFs(meso-MOFs)with a larger aperture(2-50 nm)have attracted much attention due to their potential applications in biological macromolecular catalysis,energy storage and other fields.To date,how to accurately regulate its mesopore topology and pore ordering still faces important technical challenges.展开更多
In the synthesis of highly applicable metal-organic frameworks(MOFs),obtaining pure phases poses a great challenge since some MOFs have diverse phases with the same metal sources and ligands.Among such MOFs,PCN-223 an...In the synthesis of highly applicable metal-organic frameworks(MOFs),obtaining pure phases poses a great challenge since some MOFs have diverse phases with the same metal sources and ligands.Among such MOFs,PCN-223 and PCN-221 can easily be formed together in a one-pot reaction,making it hard to separate them in a single phase.It is known that some PCN series have a kinetic relationship in the early stages of their formation mechanisms.Thus,we have dedicated our efforts to finding the kinetic relationship between PCN-223 and PCN-221 by utilizing the chemical bath deposition(CBD)method to establish reaction parameters for their pure phases.We found that one out of the two phases can be transformed into the other phase by varying the Zr precursors,water amount,modulators,substrates,and reaction time.Furthermore,the pure phase of PCN-221 with a distinct open-pore channel of 100 nm,which has not been obtained previously,can be synthesized through the CBD method.In this work,we successfully demonstrate that the CBD method is a versatile method for synthesizing phase-pure and uniform MOFs by controlling their nucleation stage and pore structures.展开更多
基金support from the National Natural Science Foundation of China(22088101,21733003,22365021,22305132)the Inner Mongolia Autonomous Region“Grassland Talents”Project(2024098)+3 种基金the Inner Mongolia Natural Science Foundation Youth Fund(2023QN02014)The Local Talent Project of Inner Mongolia(12000-15042222)the Basic Research Expenses Supported under 45 Years Old of Inner Mongolia(10000-23112101/036)the“Young Academic Talents”Program of Inner Mongolia University 23600-5233706.
文摘As a class of crystalline porous materials,metal-organic frameworks(MOFs)have shown unique advantages in the fields of catalysis,gas storage and separation,but their inherent microporous structure(pore diameter<2 nm)severely limits their application in scenarios such as macromolecular mass transfer and so on.In order to overcome this re-striction,mesoporous MOFs(meso-MOFs)with a larger aperture(2-50 nm)have attracted much attention due to their potential applications in biological macromolecular catalysis,energy storage and other fields.To date,how to accurately regulate its mesopore topology and pore ordering still faces important technical challenges.
基金supported by grants(NRF-2018R1D1A1B07050671 and NRF-2017R1A2B4006352)of the National Research Foundation of Korea(NRF)funded by the Korea Government(Ministry of Science and ICT)and by Industrial Core Technology Development Program(no.20005342,‘Development of VOC oxidation system’)funded by the Ministry of Trade,Industry&Energy(MI,Korea)supported by the Hankuk University of Foreign Studies Research Fund of 2019support of the Korea Institute of Industrial Technology(Project No.EE-19-0022).
文摘In the synthesis of highly applicable metal-organic frameworks(MOFs),obtaining pure phases poses a great challenge since some MOFs have diverse phases with the same metal sources and ligands.Among such MOFs,PCN-223 and PCN-221 can easily be formed together in a one-pot reaction,making it hard to separate them in a single phase.It is known that some PCN series have a kinetic relationship in the early stages of their formation mechanisms.Thus,we have dedicated our efforts to finding the kinetic relationship between PCN-223 and PCN-221 by utilizing the chemical bath deposition(CBD)method to establish reaction parameters for their pure phases.We found that one out of the two phases can be transformed into the other phase by varying the Zr precursors,water amount,modulators,substrates,and reaction time.Furthermore,the pure phase of PCN-221 with a distinct open-pore channel of 100 nm,which has not been obtained previously,can be synthesized through the CBD method.In this work,we successfully demonstrate that the CBD method is a versatile method for synthesizing phase-pure and uniform MOFs by controlling their nucleation stage and pore structures.
