Experimental and Theoretical Study on the Interchange between Zr and Ti within the MIL-125-NH 2 Metal Cluster.

Autor: Zeama M; Department of Physics, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia.; Center of Research Excellence in Nanotechnology (CENT), Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia., Morsy MA; Department of Chemistry, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia., Abdelnaby M; Center of Research Excellence in Nanotechnology (CENT), Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia.; Department of Chemistry, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia., Gutiérrez-Arzaluz L; Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia., Mohammed OF; Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia., Yamani ZH; Department of Physics, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia.; Center of Research Excellence in Nanotechnology (CENT), Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2021 Sep 01; Vol. 16 (17), pp. 2520-2528. Date of Electronic Publication: 2021 Aug 04.
DOI: 10.1002/asia.202100588
Abstrakt: This study aims to investigate the effect of replacing Ti with Zr in the SBU of MIL-125-NH 2 . We were able to replace Ti with Zr in the mixed metal synthesis of MIL-125-NH 2 , 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 CO 2 visible light conversion yield of the different variants in order to establish the composition-function relation in MIL-125 vis a vis CO 2 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-NH 2 . The study of CO 2 photocatalytic reduction under visible light indicated that the NH 2 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.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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