Light-induced MOF synthesis enabling composite photothermal materials

Light-induced MOF synthesis enabling composite photothermal materials

07 February 2024 | Ofir Shelonchik, Nir Lemcoff, Ran Shimoni, Aritra Biswas, Elad Yehezkel, Doron Yesod, Idan Hod, Yossi Weizmann
This study introduces a novel light-induced synthesis method for metal-organic frameworks (MOFs) using plasmonic gold bipyramidal nanoparticles (AuBPs) to enable rapid and efficient MOF formation. The method leverages the photothermal properties of AuBPs to induce MOF synthesis at elevated temperatures without the need for conventional solvothermal processes. The approach was tested with four different MOFs (UlO-66, MIL-88A, HKUST-1, and MOF-5) using various photothermal agents, including AuBPs with different sizes and shapes, gold nanospheres, and carbon-based materials. The results showed that the photothermal synthesis was significantly faster than conventional methods, achieving the same yield in minutes rather than hours. The AuBPs could be embedded within the MOF or remain in the supernatant depending on light exposure, and the resulting MOFs retained their plasmonic properties and high surface area. The study also demonstrated the ability to control the embedding of AuBPs into MOFs by adjusting the reaction temperature, enabling the reuse of AuBPs and reducing energy consumption. The developed method offers a versatile and efficient alternative to traditional MOF synthesis, with potential applications in photothermal therapy, catalysis, and material activation. The research highlights the potential of plasmonic MOFs for various applications, including photothermal desorption and MOF activation, with the ability to achieve rapid desorption of water and other molecules. The study also shows that the photothermal method can be scaled up for industrial applications, offering a promising approach for the synthesis of MOFs with enhanced properties.This study introduces a novel light-induced synthesis method for metal-organic frameworks (MOFs) using plasmonic gold bipyramidal nanoparticles (AuBPs) to enable rapid and efficient MOF formation. The method leverages the photothermal properties of AuBPs to induce MOF synthesis at elevated temperatures without the need for conventional solvothermal processes. The approach was tested with four different MOFs (UlO-66, MIL-88A, HKUST-1, and MOF-5) using various photothermal agents, including AuBPs with different sizes and shapes, gold nanospheres, and carbon-based materials. The results showed that the photothermal synthesis was significantly faster than conventional methods, achieving the same yield in minutes rather than hours. The AuBPs could be embedded within the MOF or remain in the supernatant depending on light exposure, and the resulting MOFs retained their plasmonic properties and high surface area. The study also demonstrated the ability to control the embedding of AuBPs into MOFs by adjusting the reaction temperature, enabling the reuse of AuBPs and reducing energy consumption. The developed method offers a versatile and efficient alternative to traditional MOF synthesis, with potential applications in photothermal therapy, catalysis, and material activation. The research highlights the potential of plasmonic MOFs for various applications, including photothermal desorption and MOF activation, with the ability to achieve rapid desorption of water and other molecules. The study also shows that the photothermal method can be scaled up for industrial applications, offering a promising approach for the synthesis of MOFs with enhanced properties.
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Understanding Light-induced MOF synthesis enabling composite photothermal materials