Metal organic framework(MOF) shows great potential in the research field of photocatalysis,and it is a big challenge to achieve efficient photocatalytic activity.In this work,we have successfully grown two-dimensional...Metal organic framework(MOF) shows great potential in the research field of photocatalysis,and it is a big challenge to achieve efficient photocatalytic activity.In this work,we have successfully grown two-dimensional MOF(2D-MOF) nanosheets on 2D-MOF nanosheets for the first time using a homometallic nodal strategy,and successfully prepared ultrathin nanosheets with tightly bound 2D/2D heterojunctions.2D Ni-BDC nanosheets were used as carriers to grow 2D Ni-TCPP nanosheets on top of them.Ni-TCPP has a high light absorption capacity,thus extending the light absorption range of 2D/2D heterojunctions.The tight coupling of the heterojunction effectively shortens the electron transfer distance,promotes the separation of interracial charges,and improves the photocatalytic activity.Particularly,Ni-BDC/Ni-TCPP-3can achieve to a hydrogen production rate of428.0 μmol·g^(-1),approximately 5.75 times higher than NiBDC and 5.24 times higher than Ni-TCPP,respectively.Thus,2D-MOF/2D-MOF heterojunctions provide a promising strategy for enhancing photocatalytic performance through rational heterostructure design with homometallic node strategy.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.62104003,21972065 and 21803002)the Natural Science Foundation of Anhui Province (No.1908085QB75)+3 种基金Anhui Provincial Natural Science Foundation for Distinguished Young Scholars (No.2008085J11)the Natural Science Foundation of Jiangsu Province (No.BK20220006)the Key projects of Anhui Provincial Department of Education,China (Nos.KJ2021ZD0044 and KJ2020A0228)Hefei National Laboratory for Physical Sciences at the Microscale (No.KF2020006)。
文摘Metal organic framework(MOF) shows great potential in the research field of photocatalysis,and it is a big challenge to achieve efficient photocatalytic activity.In this work,we have successfully grown two-dimensional MOF(2D-MOF) nanosheets on 2D-MOF nanosheets for the first time using a homometallic nodal strategy,and successfully prepared ultrathin nanosheets with tightly bound 2D/2D heterojunctions.2D Ni-BDC nanosheets were used as carriers to grow 2D Ni-TCPP nanosheets on top of them.Ni-TCPP has a high light absorption capacity,thus extending the light absorption range of 2D/2D heterojunctions.The tight coupling of the heterojunction effectively shortens the electron transfer distance,promotes the separation of interracial charges,and improves the photocatalytic activity.Particularly,Ni-BDC/Ni-TCPP-3can achieve to a hydrogen production rate of428.0 μmol·g^(-1),approximately 5.75 times higher than NiBDC and 5.24 times higher than Ni-TCPP,respectively.Thus,2D-MOF/2D-MOF heterojunctions provide a promising strategy for enhancing photocatalytic performance through rational heterostructure design with homometallic node strategy.
