Abstract
Synthesis of organic-inorganic hybrid hierarchical porous materials with strong ligand in framework is an important field of current research in adsorption. A new kind of inorganic/organic hierarchical zirconium phosphonate material (ZrPTA) with porous structure was prepared from bis(hexamethylene)triamino-N, N-bisacetyl- phosphonic acid and ZrOCl2·8H2O in water solution by using hydrothermal synthesis technology. The samples were characterized by FT-IR spectroscope, TGA, XRD, XPS, SEM and element analysis. The results show that the material possesses a rod-like morphology, and the rods contain micropores of 1.38 nm and 1.93 nm in diameter, mesopores of 2.99 nm in diameter, and a surface area of ~112.2 m²/g. The as-prepared ZrPTA is more efficient in removing Pb²⁺, Cu²⁺ and Cd²⁺ from wastewater. Its maximum adsorption capacities for Pb²⁺, Cu²⁺ and Cd²⁺ are 742.7, 689.8 and 627.0 mg/g, respectively, which is much higher than the maximum adsorption capacities of the adsorbents reported. The perfect properties make the material good prospects in as an adsorbent in wastewater processing.