TY - JOUR
T1 - Experimental and Theoretical Study on the Interchange between Zr and Ti within the MIL-125-NH
2
Metal Cluster
AU - Zeama, Mostafa
AU - Morsy, Mohamed A.
AU - Abdelnaby, Mahmoud
AU - Gutierrez Arzaluz, Luis
AU - Mohammed, Omar F.
AU - Yamani, Zain H.
N1 - KAUST Repository Item: Exported on 2021-08-10
Acknowledgements: We are grateful to Prof. Omar M. Yaghi (University of California,Berkeley Global Science Institute) for his support of global scienceactivities. We are thankful for CENT at KFUPM for allowing us touse their facilities in our experimental work. We are thankful to Dr.Bassem A. Al-Maythalony (KACST-TIC on CCS), KFUPM, for accessto gas sorption measurements. MZ, MA, and ZHY acknowledgethe support of Saudi Aramco through KFUPM Project No.ORCP2390.
PY - 2021/8/4
Y1 - 2021/8/4
N2 - This study aims to investigate the effect of replacing Ti with Zr in the SBU of MIL-125-NH2 . We were able to replace Ti with Zr in the mixed metal synthesis of MIL-125-NH2 , for the first time. After experimentally confirming the consistency in their framework structure and comparing their morphology, we related the femtosecond light dynamics with photocatalytic CO2 visible light conversion yield of the different variants in order to establish the composition-function relation in MIL-125 vis a vis CO2 reduction. Introducing Zr to the system was found to cause structure defects due to missing linkers. The lifetime of the charge carriers for the mixed metal samples were shorter than that of the MIL-125-NH2 . The study of CO2 photocatalytic reduction under visible light indicated that the NH2 group enhances the photocatalytic activity while the Zr incorporation inside the MIL framework introduces no significant improvements. In addition, the material systems were modelled and simulated through DFT calculations which concluded that the decrease of the photocatalytic activity is not related to the system electronic structure, insinuating that defects are the culprit.
AB - This study aims to investigate the effect of replacing Ti with Zr in the SBU of MIL-125-NH2 . We were able to replace Ti with Zr in the mixed metal synthesis of MIL-125-NH2 , for the first time. After experimentally confirming the consistency in their framework structure and comparing their morphology, we related the femtosecond light dynamics with photocatalytic CO2 visible light conversion yield of the different variants in order to establish the composition-function relation in MIL-125 vis a vis CO2 reduction. Introducing Zr to the system was found to cause structure defects due to missing linkers. The lifetime of the charge carriers for the mixed metal samples were shorter than that of the MIL-125-NH2 . The study of CO2 photocatalytic reduction under visible light indicated that the NH2 group enhances the photocatalytic activity while the Zr incorporation inside the MIL framework introduces no significant improvements. In addition, the material systems were modelled and simulated through DFT calculations which concluded that the decrease of the photocatalytic activity is not related to the system electronic structure, insinuating that defects are the culprit.
UR - http://hdl.handle.net/10754/670495
UR - https://onlinelibrary.wiley.com/doi/10.1002/asia.202100588
U2 - 10.1002/asia.202100588
DO - 10.1002/asia.202100588
M3 - Article
C2 - 34347380
SN - 1861-4728
JO - Chemistry – An Asian Journal
JF - Chemistry – An Asian Journal
ER -