journal article·2023-05-01Open access

Understanding Photocatalytic Activity Dependence on Node Topology in Ti-Based Metal–Organic Frameworks

Nikita Kolobov, Abdelali Zaki, Katarzyna Świrk, Partha Maity, Luis Garzon-Tovar, Giasemi K. Angeli, Alla Dikhtiarenko, G. Delahay, Pantelis N. Trikalitis, Abdul-Hamid Emwas, Amandine Cadiau, Omar F. Mohammed, Christopher H. Hendon, Karim Adil, Jorge Gascon

ACS Materials Letters· Volume 5· Issue 5

Abstract

High Resolution Image Download MS PowerPoint Slide Despite the drive to develop more efficient Ti-based metal–organic framework (MOF) photocatalysts, MIL-125-NH 2 is still the benchmark, and only a few design principles have been offered to improve photocatalytic performance. Linker functionalization in Ti MOFs has been shown to enable photocatalysis under visible light by closing the electronic band gap, significantly improving charge carrier lifetimes. Limited by known Ti-based MOFs, the role of node nuclearity and topology on photocatalytic activity remains unclear. Here, we report a new MOF, ICGM-1, a 3D-connected framework featuring 1D Ti–O rods. Photocatalytic hydrogen evolution reveals a significant difference in activity, which we attribute solely to node geometry. Using time-resolved spectroscopy and DFT calculations, we ascribe these differences to subtle electronic and geometric properties, paving the way for the development of Ti-MOF photocatalysts.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Advanced Nanomaterials in Catalysis · Advanced Photocatalysis Techniques

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Affiliations

Advanced Catalytic Materials, KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

ICGM, University of Montpellier, CNRS, ENSCM, Montpellier, 34090, France

Advanced Membranes and Porous Materials Center, KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

Imaging and Characterization Department, KAUST Core Laboratories, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia

Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States

Funding

Camille and Henry Dreyfus Foundation · King Abdullah University of Science and Technology · Division of Materials Research

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