Interface engineering of photocatalysts is an effective way to enhance their photocatalytic activity.In this work,the MOF-on-MOF strategy was used to construct the ZIF-9(Co)/Cu_(3)BTC_(2) photocatalyst in situ.Moreove...Interface engineering of photocatalysts is an effective way to enhance their photocatalytic activity.In this work,the MOF-on-MOF strategy was used to construct the ZIF-9(Co)/Cu_(3)BTC_(2) photocatalyst in situ.Moreover,graph-diyne,possessing an inherent capability to facilitate rapid electron transfer at the interface,has been introduced into the ZIF-9(Co)/Cu_(3)BTC_(2) interface to regulate the interfacial carrier migration.The photogenerated carrier transfer capability has been significantly enhanced by the interfacial synergy,while retaining the original active sites and high specific surface area.The exceptional efficiency performance of the composite catalyst under identical conditions could be attributed to the following two key factors:(i)The interfacial S-scheme hetero-junction in ZIF-9(Co)/Cu_(3)BTC_(2) provides the composite catalyst with strong reduction activity,facilitating the involvement of additional electrons in the reduction reaction through bended bands and an internal electric field.(ii)Carrier dynamics analysis shows that graphdiyne,as an electron transport layer,accelerates the charge migration rate at the S-scheme heterojunction interface through the electron relay effect.The incorporation of graphdiyne greatly improves the catalytic activity of MOFs and also demonstrates the great potential of graph-diyne in photocatalysis.This work provides a feasible idea for the interface engineering design of graphdiyne in photocatalysts.展开更多
基金supprted by the“Fundamental Research Funds for the Central Universities”,North Minzu University(2023XYZHG01)Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team projectInnovative team for transforming waste cooking oil into clean energy and high value-added chemicals,China
文摘Interface engineering of photocatalysts is an effective way to enhance their photocatalytic activity.In this work,the MOF-on-MOF strategy was used to construct the ZIF-9(Co)/Cu_(3)BTC_(2) photocatalyst in situ.Moreover,graph-diyne,possessing an inherent capability to facilitate rapid electron transfer at the interface,has been introduced into the ZIF-9(Co)/Cu_(3)BTC_(2) interface to regulate the interfacial carrier migration.The photogenerated carrier transfer capability has been significantly enhanced by the interfacial synergy,while retaining the original active sites and high specific surface area.The exceptional efficiency performance of the composite catalyst under identical conditions could be attributed to the following two key factors:(i)The interfacial S-scheme hetero-junction in ZIF-9(Co)/Cu_(3)BTC_(2) provides the composite catalyst with strong reduction activity,facilitating the involvement of additional electrons in the reduction reaction through bended bands and an internal electric field.(ii)Carrier dynamics analysis shows that graphdiyne,as an electron transport layer,accelerates the charge migration rate at the S-scheme heterojunction interface through the electron relay effect.The incorporation of graphdiyne greatly improves the catalytic activity of MOFs and also demonstrates the great potential of graph-diyne in photocatalysis.This work provides a feasible idea for the interface engineering design of graphdiyne in photocatalysts.
