一种二维多孔窗口型膦酸锆材料的合成及其对不同金属离子的吸附性能

合成了一种二维窗口型膦酸锆材料β-丙氨酸-N,N-双亚甲基膦酸锆(ZrNCP),采用X射线衍射仪、扫描电镜、透射电镜分析了合成产物的相组成和微观结构;利用N2吸脱附试验装置测定了合成产物对不同金属离子的吸附性能,考察了浓度、温度及pH对其吸附性能的影响.结果表明,合成产物内部存在大量分布均匀的微介孔,材料微观形貌为规整片状.随着金属离子半径的增大,ZrNCP对各种金属离子的平衡吸附量(mmol/g)呈逐渐减小趋势.

Synthesis of a new window type hybrid porous zirconium phosphonate and its adsorption performance for several metal ions

Two dimensional window type zirconium phosphonate, β-alanine-N,N-dimethylphos- phonate （ZrNCP）, was prepared. The phase composition and microstructure of as-synthesized product were analyzed by means of X-ray diffraction, scanning electron microscopy, and trans- mission electron microscopy. Moreover, a nitrogen adsorption-desorption test rig was per- formed to evaluate the adsorption performance of as-synthesized ZrNCP for several metal ions; and the effects of concentration, temperature and pH value on the adsorption performance of as-synthesized product were investigated. Results show that there is a large amount of uni- formly distributed mesopores inside the as-synthesized product, and target product has regular plate-like morphology. Moreover, the adsorption capacities （mmol/g） of ZrNCP for various metal ions tend to gradually decline with increasing radius of the metal ions.