Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red.

ABSTRACT: The 3D hierarchical porous 7MgO·2B₂O₃·7H₂O (MBH) microspheres were prepared by a phase transformation of chloropinnoite firstly, and anhydrous α-3MgO·B₂O₃ (MBA) microspheres were obtained by thermal conversion of 7MgO·2B₂O₃·7H₂O, and then β-3MgO·B₂O₃ (MBB) microspheres were obtained by phase conversion of α-3MgO·B₂O₃. All samples were characterized by XRD, FT-IR, TG and SEM. The microsphere nanostructures with a hierarchical porous structure were assembled by nanosheets with a thickness of 20-30 nm, and the growth mechanisms were also proposed. By using N₂ adsorption-desorption, the specific surface areas were measured as 103.62 m² g

SUBMITTER: Guo RF 

PROVIDER: S-EPMC9065457 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature