Metallurgical Engineering

Metallurgical Engineering

A competent Magnetic MOF Catalyst of Gadolinium-Nanoparticles-Decorated Graphitic Carbon Nitride (g-C3N4) @ Functionalized UiO-66-COOH as a novel and efficient MOF-Catalyst to remove Heavy Metals

Document Type : Research Paper

Authors
leila mohammadi 1
mohammadreza vaezi 2
1 PhD, Department of Nano Technology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran.
2 Professor, Department of Nano Technology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran.
10.22076/me.2024.2036451.1411
Abstract
This work is motivated to identify newly synthesized MOF nano-catalyst via metal-organic frameworks UiO-66-Type with free carboxylic acid as an efficient MOF functionalized magnetic graphitic carbon nitride (Fe3O4/g-C3N4) via decoration of Gadolinium- Nanoparticles. In order to prepare a highly efficient catalyst UiO-66-COOH @ g-C3N4/Fe3O4 @ Gd-NPs as a heterogeneous catalyst for applying to remove Heavy Metals which have been investigated. UiO-66s with acidic sites, such as carboxylic, have been synthesized for acid catalysis and adsorptions. UiO-66 MOFs with free –COOH groups could be obtained by several methods such as direct synthesis, ligand exchange, and post-modification. For direct synthesis of UiO-66-COOH and UiO-66-(COOH)2, 1,2,4-benzene tricarboxylic acid and 1,2,4,5-benzene-tetracarboxylic acid (BTEC), respectively, were applied as the organic linker. These adsorption studies can not only suggest potential applications of the obtained MOFs but also confirm the presence of free –COOH. In this work, we still confined ourselves to the model MOF system of carboxylic acid-functionalized, Zr-based UiO-66-COOH, in the superior chemical and hydrothermal stability of UiO-66 as well as the COOH -modification-induced improvement in absorption capacity. Various techniques, including FT-IR, XRD, BET, SEM, TEM, EDS, and elemental mapping were used to characterize UiO-66-COOH @g-C3N4/Fe3O4 @ Gadolinium Nano particles, indicating its successful preparation. The results of productivity catalyst are accomplished in excellent yields under mild conditions which is a proof of superior activity heterogeneous catalyst containing Gadolinium-nanoparticles. The adsorption capacity of g-C3N4/Fe3O4/UiO-66-COOH is expected to reach a maximum of 292 mg/L, which is attributed to abundant functional groups and high surface area.
Keywords
nano porous
nano structures
Metal Organic Framework
MOF
UiO-66-COOH
Gd-nano particles

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  • Receive Date 24 July 2024
  • Revise Date 26 October 2024
  • Accept Date 23 November 2024