Lanthanide metal-organic frameworks(MOFs)have received special attention due to their unusual coordination characteristics and exceptional luminescence properties,while their development has extremely limited by the c...Lanthanide metal-organic frameworks(MOFs)have received special attention due to their unusual coordination characteristics and exceptional luminescence properties,while their development has extremely limited by the cost effective and powder form.Herein,a gentle and facile strategy was developed to create a granular lanthanide MOFs@activated carbon(AC)composite.The obtained granular Tb-BTC@AC composite displays high fluorescent selectivity and sensitivity towards Cr^(3+) cations in water with quenching efficiency up to 90.12%,and shows great sensitivity in the range of 10^(-5)—10^(-4) mol/L with the Stern-Volmer constant of 2.224×10^(3) L/mol.Benefited by the high surface area,the abundant self-assembly space was provided for the self-assembling of the Lanthanide MOFs,which leads to promising Cr^(3+) cation-recognition ability with low MOF quantity.Also,the large size(with an average diameter of 2 mm);shaped form of this new composite material reduced the threshold of MOF application.展开更多
基金supported by the National Natural Science Foundation of China(Nos.22071076,22090061)the Project of the Department of Science and Technology of Guangdong Province,China(No.2021A1515010204).
文摘Lanthanide metal-organic frameworks(MOFs)have received special attention due to their unusual coordination characteristics and exceptional luminescence properties,while their development has extremely limited by the cost effective and powder form.Herein,a gentle and facile strategy was developed to create a granular lanthanide MOFs@activated carbon(AC)composite.The obtained granular Tb-BTC@AC composite displays high fluorescent selectivity and sensitivity towards Cr^(3+) cations in water with quenching efficiency up to 90.12%,and shows great sensitivity in the range of 10^(-5)—10^(-4) mol/L with the Stern-Volmer constant of 2.224×10^(3) L/mol.Benefited by the high surface area,the abundant self-assembly space was provided for the self-assembling of the Lanthanide MOFs,which leads to promising Cr^(3+) cation-recognition ability with low MOF quantity.Also,the large size(with an average diameter of 2 mm);shaped form of this new composite material reduced the threshold of MOF application.
