title: Hollow manganese phosphonate microspheres with hierarchical porosity for efficient adsorption and separation.
abstract: Hollow manganese phosphonate microspheres of an inorganic-organic hybrid with hierarchically porous shells were prepared through a template-free hydrothermal method using ethylene diamine tetra(methylene phosphonic acid) as the coupling molecule. The hollow structures with hierarchical porosity were confirmed by SEM, TEM and N2 sorption. FT-IR, XPS and TG-DSC measurements revealed that the organophosphonate linkers were homogeneously incorporated into the hybrid framework. The hierarchical manganese phosphonates could be used as efficient adsorbents for the removal of copper ions, showing fast binding kinetics due to the well-structured porosity. The adsorption process follows pseudo-second order reaction kinetics, as well as Langmuir isotherm, indicating that Cu(2+) was monolayer adsorbed on the hybrid by chemical complexation. Furthermore, the synthesized manganese phosphonates with peculiar porosity exhibited excellent size selectivity for protein adsorption in a complex solution, presenting the promising potential as candidates for biomaterials.
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China. zyyuan@nankai.edu.cn.
authors.forename: Yun-Pei
authors.initials: YP
authors.lastname: Zhu
authors.forename: Ya-Lu
authors.initials: YL
authors.lastname: Liu
authors.forename: Tie-Zhen
authors.initials: TZ
authors.lastname: Ren
authors.forename: Zhong-Yong
authors.initials: ZY
authors.lastname: Yuan