Magnetic Fe3O4@SiO2 study on adsorption of methyl orange on nanoparticles

Heng Li; Huanhuan Jin; Ranran Li; Junpeng Hua; Zhen Zhang; Ruixin Li

doi:10.1038/s41598-023-50368-x

Magnetic Fe₃O₄@SiO₂ study on adsorption of methyl orange on nanoparticles

Sci Rep. 2024 Jan 12;14(1):1217. doi: 10.1038/s41598-023-50368-x.

Authors

Heng Li¹, Huanhuan Jin², Ranran Li², Junpeng Hua², Zhen Zhang², Ruixin Li²

Affiliations

¹ School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China. neaulih@neau.edu.cn.
² School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China.

Abstract

Magnetic core-shell Fe₃O₄@SiO₂ nanoparticles were synthesized by sol-gel method. Based on the characterization and experimental results, the adsorbent was found to have an average particle size of approximately 120 nm, a pore size range of 2-5 nm and superparamagnetic properties. It exhibited electrostatic and hydrogen bonding interactions during adsorption of methyl orange (MO). The adsorption of MO on the magnetic Fe₃O₄@SiO₂ nanoparticles exhibited pseudo-second-order kinetics, the adsorption process is a spontaneous endothermic adsorption process, which conforms to the Langmuir adsorption isotherm model. he maximum amount of MO was adsorbed at pH = 2, T = 45 °C and t = 30 min, and the highest adsorption capacity was 182.503 mg/g; The unit adsorption capacity of the Fe₃O₄@SiO₂ nanoparticles still reached 83% of the original capacity after 5 cycles, so the material was reusable and met the requirements of environmental protection. This study reveals the great potential of magnetic mesoporous nanoparticles for removal of dyes from wastewater.