Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 19, Pages 4742-4748Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01108
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Funding
- National Research Foundation of Korea (NRF) - Korean Government [2019R1A2C2005162, 2020R1I1A1A01066732]
- Korea Research Fellowship Program - Ministry of Science and ICT through the National Research Foundation of Korea [2019H1D3A1A01071069]
- National Research Foundation of Korea [2020R1I1A1A01066732, 2019H1D3A1A01071069, 2019R1A2C2005162] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The combination of magnetic Pd NPs with UiO-66(Hf) results in enhanced magnetic properties, leading to strongly ferromagnetic hybrid structures with high magnetization and coercivity. The magnetization of the hybridized structure is analyzed using a modified Langevin function, showing a 2 to 3 times increase in magnetic property.
Nonmagnetic Pd exhibits ferromagnetism in the nanosize regime. Various stabilization agents, including surfactants, metal oxide supports, polymers, and porous materials (e.g., metal-organic frameworks (MOFs)), have been employed to prevent the agglomeration of metal nanoparticles. However, magnetic properties are greatly affected by the structural and electronic changes imposed by these stabilizing agents. In particular, metal-MOF hybrids (NPs@MOFs) have reduced magnetic properties, as reported by several authors. Herein, we report the enhancement in magnetic properties resulting from the combination of magnetic Pd NPs with UiO-66(Hf), which exhibits ferromagnetism, and the corresponding modifications in the hybridized structures. These hybridized structures are found to be strongly ferromagnetic, showing high magnetization and coercivity. We observed that the magnetic property is enhanced by 2 to 3 times upon including the Pd NPs on the surface of a UiO-66(Hf) shell support. For a fundamental understanding, the magnetization (M-H data) of the hybridized structure is analyzed with a modified Langevin function.
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