The effect of Silica Mass Ratio on Pore Structure and Magnetic Characteristics of Fe3O4@SiO2 Core-Shell Nanoparticles

Articles in Press

Document Type : Research Article

Authors

1 Physics Department, Faculty Mathematics and Sciences, Universitas Negeri Surabaya

2 Department of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang

3 Department of Chemistry, Faculty of Science and Analytical Data, Institut Teknologi Sepuluh Nopember (ITS) Surabaya

4 Department of Physics, Faculty of Mathematics and Sciences, Universitas Negeri Surabaya, Indonesia

10.24200/sci.2024.61855.7524

Abstract

The fabrication of Fe3O4@SiO2 core-shell was prepared from natural iron sand as Fe3O4 core resource and in situ SiO2-coating method. The Fe3O4@SiO2 was synthesized via an ultrasonic route with various ratios of tetraethyl orthosilicate (TEOS) to evaluate the core-shell's morphological, pore structure, and magnetic properties. XRD and FTIR were used to characterize the prepared Fe3O4 and Fe3O4@SiO2. SEM analyzed the effect of the TEOS on the particle size, and TEM observed the morphology of core-shell and shell thickness. The BET data revealed that Fe3O4@SiO2(65) exhibited a larger diameter pore size of 88.17 nm and eight times higher BET surface area (80.23 m2/g) than Fe3O4@SiO2(45) (27.69 nm; 10.5 m2/g). The VSM data indicated that the more TEOS addition on Fe3O4@SiO2 caused the decrease of magnetization value but still gave good magnetic properties from 95.32 emu/g for Fe3O4@SiO2(45) to 17.02 emu/g for Fe3O4@SiO2(65). The study found that the higher content of SiO2 reduced the agglomeration of the Fe3O4 core indicated by no hysteresis loop on the N2 adsorption-desorption curve of Fe3O4@SiO2(65), resulting in core-shell material with better properties in higher specific surface area, average pore size and volume for further application.

Keywords

Main Subjects

Scientia Iranica

Articles in Press, Corrected Proof
Available Online from 04 May 2026

Files

History

  • Receive Date: 06 February 2023
  • Revise Date: 31 December 2023
  • Accept Date: 27 January 2024

Share

How to cite

Statistics