S.M. Shahrul Nizan Shikh Zahari, Nurul Hafizah Muhamad Tajuddin, Nur Fatin Izzati Che Sam, Kholoud M.H. Elzaneen, Poppy Puspitasari, Cameron C. Weber, Nurazilah Mohd Zainon
Polyvinylpyrrolidone-coated iron magnetic nanoparticles (PVP-Fe MNPs) have proven to be useful materials for several applications. However, the relationship between the PVP loading and the properties of these materials is not currently well understood. In this study, we examine the changes in the magnetic properties and morphology of PVP-Fe MNPs as a result of varying the PVP loading. The samples were synthesised by a co-precipitation technique in a homogeneous solution containing PVP and iron salts. Fourier transform infrared spectroscopy (FTIR) indicates the presence of PVP on the surface of the core-Fe MNPs. Meanwhile, vibrating sample magnetometer (VSM) reveals that the PVP loading had an inverse relationship with the magnetic properties (saturation magnetisation, Ms, remanence magnetisation, Mr and coercivity, Hc), which was mainly impacted by the morphology of the resultant PVP-Fe MNPs. Thermogravimetric (TGA) and carbon and nitrogen elemental analyses were used to characterise the proportion of PVP bound to Fe-MNPs. The results suggest that the properties of these PVP-Fe MNPs can be tuned by the PVP loading used in their synthesis, allowing these materials to be tailored for the targeted application. © 2023 Elsevier B.V.
Industrial Chemical Technology Programme, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, Negeri Sembilan, Nilai, 71800, Malaysia; Department of Chemical Engineering, South Kensington Campus, Imperial College London, London, SWZ 2AZ, United Kingdom; Mechanical Engineering Department, Engineering Faculty, Malang State University, Semarang Street 5, Malang, East Java, Indonesia; School of Chemical Sciences, University of Auckland, Auckland, 1010, New Zealand; MacDiarmid Institute of Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand; Industrial Centre of Innovation in Biomedical, SIRIM Industrial Research, Lot 34, Jalan Hi-Tech 2/3, Kulim Hi-Tech Park, Kedah, Kulim, 09000, Malaysia