The evaluation of amine-functionalized iron oxide Nnanoparticles as potential dye removal from aqueous medium

• Main Authors: Khairil Azizi, Azra Filzaira, Che Nan, Siti Nursyamsulbahria, Mohd Salim, Rosliza, Abd Hamid, Shafida, Razali, Azaima
• Format: Conference or Workshop Item
• Language: English
• Published: 2022
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://irep.iium.edu.my/97295/7/97295_%20The%20evaluation%20of%20amine-functionalized%20iron%20oxide.pdf; http://irep.iium.edu.my/97295/

Magnetic nanoparticles (MNP) are superparamagnetic nanoparticles that are gaining significant interests due to their high surface-to-volume ratio and unique physicochemical properties. However, anisotropic dipolar attraction may cause the MNP to aggregate and undergo biodegradation when their surfaces are exposed directly to biological environment MNP (Souza et al., 2013)⁠⁠. This can be overcome by encapsulating the MNP with biocompatible and stabilizer shell using polymers or inorganic compounds (Mourdikoudis et al., 2021)⁠⁠. In this work, amine-functionalized iron oxide (Fe3O4) magnetic nanoparticles (MNP) were synthesized using a facile one-pot method in Teflon-lined stainless steel autoclave. In this work, we ran the reaction for 6 hours at 150ºC and 200ºC, respectively. The temperatures were varied to investigate their effects on the physicochemical properties of MNP. The morphology and size of the amine-functionalized MNP, and their functional groups were investigated using transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The synthesis reaction that was carried out for 6 hours at 150ºC produced brown precipitate indicating incomplete Fe3O4 formation (Songvorawit et al., 2011)⁠⁠. On the other hand, after 6 hours of reaction at 200ºC, black precipitate of Fe3O4 was obtained. Based on the FTIR results, significant peaks at 600-560 cm-1 representing Fe-O functional groups were absent for products from 150ºC but can be clearly observed for 200ºC product. Similarly, significant peaks at ~1600 cm-1 were observed for the 200ºC product indicating amine-functionalized MNP (A-MNP). In summary, this work showed a facile technique for the synthesis of amine-functionalized MNP by a solvothermal process using one-pot method and an autoclave as the reactor. The reaction time and temperature play important roles in determining the formation of amine-functionalized MNP. Preliminary results have shown that A-MNP have the potential to be utilized as dye adsorbents from aqueous medium.