In this paper we present the studying results of the synthesize process, the magnetic properties, microstructure, surface properties of Mn, Cu doped Fe3O4 nanomaterials and the influence of Mn, Cu concentrations on the arsenic adsorption process in water at different pH. | Applied Surface Science 340 2015 166 172 Contents lists available at ScienceDirect Applied Surface Science journal homepage locate apsusc Effects of Mn Cu doping concentration to the properties of magnetic nanoparticles and arsenic adsorption capacity in wastewater Tran Minh Thi Nguyen Thi Huyen Trang Nguyen Thi Van Anh Faculty of Physics Hanoi National University of Education Viet Nam a r t i c l e i n f o a b s t r a c t Article history The research results of Fe3 O4 and Mn Cu doped Fe3 O4 nanomaterials synthesized by a chemical method Received 14 September 2014 for As III wastewater treatment are presented in this paper. The X-ray diffraction patterns and trans- Received in revised form 1 February 2015 mission electron microscopy images showed that samples had the cubic spinel structure with the grain Accepted 22 February 2015 sizes were varied from nm to nm. The results of vibrating sample magnetometer measurements Available online 27 February 2015 at room temperature showed that saturation magnetic moments of Fe1 x Cux Fe2 O4 and Fe1 x Mnx Fe2 O4 samples decreased from emu g to emu g and emu g to emu g respectively with the Keywords increase of Cu Mn concentrations from to . The nitrogen adsorption desorption isotherm of a Mn Cu doped Fe3 O4 nanoparticles typical Fe3 O4 sample at 77 K was studied in order to investigate the surface and porous structure of Magnetic nanoparticles nanoparticles by BET method. The specific surface area of Fe3 O4 magnetic nanoparticles was calculated Arsenic adsorption about of m2 g. The pore size distribution of about 15 20 nm calculated by the BJH Barrett Joyner and Halendar method at a relative pressure P P0 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 Fe3 O4 nanoparticles is better than that of Fe3 O4 and Mn doped Fe3 O4 nanoparticles in a solution .
