title: Controllable synthesis of hierarchical porous Fe3O4 particles mediated by poly(diallyldimethylammonium chloride) and their application in arsenic removal.
abstract: Hierarchical porous Fe3O4 particles with tunable grain size were synthesized based on a facile poly (diallyldimethylammonium chloride) (PDDA)-modulated solvothermal method. The products were characterized with scanning electron microscopy (SEM) and transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N2 adsorption-desorption technique, vibrating sample magnetometer (VSM), and dynamic light scattering (DLS). The results show that increasing the PDDA dosage decrease the grain size and particle size, which increased the particle porosity and enhanced the surface area from 7.05 to 32.75 m(2) g(-1). Possible mechanism can be ascribed to the PDDA function on capping the crystal surface and promoting the viscosity of reaction medium to mediate the growth and assembly of grain. Furthermore, the arsenic adsorption application of the as-obtained Fe3O4 samples was investigated and the adsorption mechanism was proposed. High magnetic Fe3O4 particles with increased surface area display improved arsenic adsorption performance, superior efficiency in low-level arsenic removal, high desorption efficiency, and satisfactory magnetic recyclability, which are very promising compared with commercial Fe3O4 particles.
authors.affiliation: Department of Environmental Engineering, School of Metallurgy and Environment, Central South University , Changsha 410017, P. R. China.
authors.forename: Ting
authors.initials: T
authors.lastname: Wang
authors.forename: Liyuan
authors.initials: L
authors.lastname: Zhang
authors.forename: Haiying
authors.initials: H
authors.lastname: Wang
authors.forename: Weichun
authors.initials: W
authors.lastname: Yang
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Fu
authors.forename: Wenli
authors.initials: W
authors.lastname: Zhou
authors.forename: Wanting
authors.initials: W
authors.lastname: Yu
authors.forename: Kaisong
authors.initials: K
authors.lastname: Xiang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Su
authors.forename: Shuo
authors.initials: S
authors.lastname: Dai
authors.forename: Liyuan
authors.initials: L
authors.lastname: Chai