TY - JOUR
T1 - Effects of Mn, Cu doping concentration to the properties of magnetic nanoparticles and arsenic adsorption capacity in wastewater
AU - Thi, Tran Minh
AU - Trang, Nguyen Thi Huyen
AU - Van Anh, Nguyen Thi
N1 - Funding Information:
This work was supported by the NAFOSTED Foundation, Code: 103.02-2013.49.
Publisher Copyright:
© 2015 Published by Elsevier B.V.
PY - 2015/6/15
Y1 - 2015/6/15
N2 - The research results of Fe 3 O 4 and Mn, Cu doped Fe 3 O 4 nanomaterials synthesized by a chemical method for As(III) wastewater treatment are presented in this paper. The X-ray diffraction patterns and transmission electron microscopy images showed that samples had the cubic spinel structure with the grain sizes were varied from 9.4 nm to 18.1 nm. The results of vibrating sample magnetometer measurements at room temperature showed that saturation magnetic moments of Fe 1-x Cu x Fe 2 O 4 and Fe 1- x Mn x Fe 2 O 4 samples decreased from 65.9 emu/g to 53.2 emu/g and 65.9 emu/g to 61.5 emu/g, respectively, with the increase of Cu, Mn concentrations from 0.0 to 0.15. The nitrogen adsorption-desorption isotherm of a typical Fe 3 O 4 sample at 77 K was studied in order to investigate the surface and porous structure of nanoparticles by BET method. The specific surface area of Fe 3 O 4 magnetic nanoparticles was calculated about of 100.2 m 2 /g. The pore size distribution of about 15-20 nm calculated by the BJH (Barrett, Joyner, and Halendar) method at a relative pressure P/P 0 of about 1. Although the saturation magnetic moments of samples decreased when the increase of doping concentration, but the arsenic adsorption capacity of Cu doped Fe 3 O 4 nanoparticles is better than that of Fe 3 O 4 and Mn doped Fe 3 O 4 nanoparticles in a solution with pH = 7. In the solution with a pH > 14, the arsenic adsorption of magnetic nanoparticles is insignificant.
AB - The research results of Fe 3 O 4 and Mn, Cu doped Fe 3 O 4 nanomaterials synthesized by a chemical method for As(III) wastewater treatment are presented in this paper. The X-ray diffraction patterns and transmission electron microscopy images showed that samples had the cubic spinel structure with the grain sizes were varied from 9.4 nm to 18.1 nm. The results of vibrating sample magnetometer measurements at room temperature showed that saturation magnetic moments of Fe 1-x Cu x Fe 2 O 4 and Fe 1- x Mn x Fe 2 O 4 samples decreased from 65.9 emu/g to 53.2 emu/g and 65.9 emu/g to 61.5 emu/g, respectively, with the increase of Cu, Mn concentrations from 0.0 to 0.15. The nitrogen adsorption-desorption isotherm of a typical Fe 3 O 4 sample at 77 K was studied in order to investigate the surface and porous structure of nanoparticles by BET method. The specific surface area of Fe 3 O 4 magnetic nanoparticles was calculated about of 100.2 m 2 /g. The pore size distribution of about 15-20 nm calculated by the BJH (Barrett, Joyner, and Halendar) method at a relative pressure P/P 0 of about 1. Although the saturation magnetic moments of samples decreased when the increase of doping concentration, but the arsenic adsorption capacity of Cu doped Fe 3 O 4 nanoparticles is better than that of Fe 3 O 4 and Mn doped Fe 3 O 4 nanoparticles in a solution with pH = 7. In the solution with a pH > 14, the arsenic adsorption of magnetic nanoparticles is insignificant.
KW - Arsenic adsorption
KW - Cu doped Fe O nanoparticles
KW - Magnetic nanoparticles
KW - Mn
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U2 - 10.1016/j.apsusc.2015.02.132
DO - 10.1016/j.apsusc.2015.02.132
M3 - Article
AN - SCOPUS:84926177798
SN - 0169-4332
VL - 340
SP - 166
EP - 172
JO - Applied Surface Science
JF - Applied Surface Science
ER -