Effect of the rare-earth substitution on the structural,magnetic and adsorption properties in cobalt ferrite nanoparticles |
| |
| Affiliation: | 1. State Key Laboratory of Chemical Resource Engineering and School of Science, Beijing University of Chemical Technology, Beijing 100029, China;2. Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China;1. Department of Applied Physics, Aligarh Muslim University, Aligarh 202002, India;2. Department of Chemistry, University College of Science, Osmania University, Hyderabad 500007, Telangana, India;3. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;4. National Physical Laboratory (CSIR), Dr. K.S. Krishnan Road, New Delhi 110012, India;5. Spin Device Technology Centre, Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan;6. Electronic Materials & Nanomagnetism Lab, Department of Applied Physics, Amity School of Applied Sciences, Amity University Haryana, Gurgaon, 122413, India;7. Department of Physics, University college of Science, Osmania University, Hyderabad 500007, Telangana, India;8. Centre for Material Science Engineering, National Institute of Technology, Hamirpur 177005, Himachal Pradesh, India;1. Faculty of Chemistry, “Alexandru Ioan Cuza” University of Iasi, Carol I Bd., no. 11, 700506 Iasi, Romania;2. Faculty of Physics, “Alexandru Ioan Cuza” University of Iasi, Carol I Bd., no. 11, 700506 Iasi, Romania;3. Saarland University, Physical Chemistry, 66123 Saarbrüken, Germany;1. Materials and Nanomaterials Centre, Moroccan Foundation for Advanced Science, Innovation and Research, MAScIR, Rabat, Morocco;2. Laboratoire de Matière Condensée et Sciences Interdisciplinaires (LaMCScI), B.P. 1014, Faculty of Science-Mohammed V University, Rabat, Morocco;3. Hassan II Academy of Science and Technology, Rabat, Morocco |
| |
| Abstract: | Rare-earth (RE) substituted cobalt ferrite CoFe1.9RE0.1O4 (RE=Pr3+, Sm3+, Tb3+, Ho3+) nanoparticles are synthesized by a facile hydrothermal method without any template and surfactant. The effects of RE3+ substitution on structural, magnetic and adsorption properties of cobalt ferrite nanoparticles are investigated. Structure, morphology, particle size, chemical composition and magnetic properties of the ferrite nanoparticles are studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), high solution transmission electron microscopy (HRTEM), energy-dispersive spectrometer (EDS), Fourier transform spectroscopy (FTIR), Raman spectra and vibrating sample magnetometry (VSM). The results indicate that the as-synthesized samples have the pure spinel phase, uniform crystallite size and narrow particle size distribution. Meanwhile, the RE3+ substitution leads to the decrease in the particle size, magnetization and coercivity of the CoFe2O4 ferrite. Notably, it demonstrates that the RE3+ doping can apparently enhance the adsorption capacity for Congo red (CR) onto ferrite nanoparticles. Adsorption equilibrium studies show that adsorption of CR follows the Langmuir model. The monolayer adsorption capacities of CoFe1.9Sm0.1O4 and CoFe1.9Ho0.1O4 are 178.6 and 158.0 mg/g, respectively. The adsorption kinetics can be described by the pseudo-second-order model. |
| |
| Keywords: | Adsorption Magnetic nanoparticle Rare-earth substitution |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
