TY - JOUR
T1 - Effective adsorptive performance of Fe3O4@SiO2 core shell spheres for methylene blue
T2 - kinetics, isotherm and mechanism
AU - Subhan, Fazle
AU - Aslam, Sobia
AU - Yan, Zifeng
AU - Khan, Mawaz
AU - Etim, U. J.
AU - Naeem, Muhammad
N1 - Publisher Copyright:
© 2019, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - In this study, Fe3O4 nanoparticles (NPs) as a core surrounded with thick and tunable SiO2 shells were successfully synthesized and characterized by means of N2-isotherm, scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), fourier transform infrared (FT-IR) and UV–Vis diffuse reflection spectroscopy (UV–Vis DRS) techniques. The characterization results revealed that well-structured SiO2 shell of 105 nm thick is uniformly formed around Fe3O4 (NPs size of 500 nm) surface. The application of the synthesized core–shell structures was investigated for methylene blue (MB), rhodamine B (Rh B) and methyl orange (MO) toxic dyes adsorptive removal from water by batch adsorption methods and different adsorption parameters such as time, pH, material dosage, concentration of solution and different dyes were optimized. The highest adsorption capacity (123 mg g−1) of MB dye was achieved on Fe3O4@SiO2. The isotherms and kinetic models exhibited that MB adsorption values are well described by Freundlich isotherm and pseudo-first-order kinetics models. The adsorptive binding of MB with Fe3O4@SiO2 was directed through electrostatic interaction and size filter effect. After regeneration, approximately 100% MB dye adsorption capacity was recovered. Thus, we can say that the Fe3O4@SiO2 is an outstanding material for dyes removal from water.
AB - In this study, Fe3O4 nanoparticles (NPs) as a core surrounded with thick and tunable SiO2 shells were successfully synthesized and characterized by means of N2-isotherm, scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), fourier transform infrared (FT-IR) and UV–Vis diffuse reflection spectroscopy (UV–Vis DRS) techniques. The characterization results revealed that well-structured SiO2 shell of 105 nm thick is uniformly formed around Fe3O4 (NPs size of 500 nm) surface. The application of the synthesized core–shell structures was investigated for methylene blue (MB), rhodamine B (Rh B) and methyl orange (MO) toxic dyes adsorptive removal from water by batch adsorption methods and different adsorption parameters such as time, pH, material dosage, concentration of solution and different dyes were optimized. The highest adsorption capacity (123 mg g−1) of MB dye was achieved on Fe3O4@SiO2. The isotherms and kinetic models exhibited that MB adsorption values are well described by Freundlich isotherm and pseudo-first-order kinetics models. The adsorptive binding of MB with Fe3O4@SiO2 was directed through electrostatic interaction and size filter effect. After regeneration, approximately 100% MB dye adsorption capacity was recovered. Thus, we can say that the Fe3O4@SiO2 is an outstanding material for dyes removal from water.
KW - Adsorption
KW - FeO@SiO
KW - Isotherms
KW - Kinetics
KW - Toxic dyes
UR - http://www.scopus.com/inward/record.url?scp=85063218430&partnerID=8YFLogxK
U2 - 10.1007/s10934-019-00744-8
DO - 10.1007/s10934-019-00744-8
M3 - 文章
AN - SCOPUS:85063218430
SN - 1380-2224
VL - 26
SP - 1465
EP - 1474
JO - Journal of Porous Materials
JF - Journal of Porous Materials
IS - 5
ER -