以氯化钙、磷酸氢二铵、十六烷基三甲基溴化铵为原料,采用水热合成工艺制备了介孔纳米羟基磷灰石,并用X射线衍射仪、扫描电子显微镜和比表面积分析仪对其进行物相、形貌和结构进行表征,然后着重研究了介孔纳米羟基磷灰石在各种不同条件下对刚果红染料的吸附性能。结果表明:介孔纳米羟基磷灰石的微观形貌为针棒状,比表面积为29.7376m²/g,平均孔径为41.558nm,孔体积为0.325196cm³/g。介孔纳米羟基磷灰石材料对刚果红染料具有较好的吸附性能,当溶液pH为7时,介孔纳米羟基磷灰石对刚果红吸附效果最好,最大吸附量可达183.77mg/g。通过模型拟合可知介孔纳米羟基磷灰石对刚果红的吸附过程符合准二级动力学模型和朗格缪尔等温吸附模型,属于自发的吸热过程。因此,介孔纳米羟基磷灰石可以作为绿色生物吸附剂用于染料的吸附。

The mesoporous nano-hydroxyapatite was prepared by hydrothermal synthesis process using calcium chloride,diammonium hydrogen phosphate and cetyltrimethylammonium bromide as raw materials.he phase,morphology and structure of the mesoporous nano-hydroxyapatite were characterized by X-ray diffraction analysis,scanning electron microscopy and specific surface area analyzer.Then,the adsorption properties of the mesoporous nano-hydroxyapatite for Congo red dye under different conditions were studied emphatically.The experiment results showed that the microscope morphology of nano-hydroxyapatite was needle-rod shape,the specific surface area was 29.7376m²/g,the average pore size was 41.558nm,and the pore volume was 0.325196cm³/g.The mesoporous nano-hydroxyapatite had good adsorption performance for Congo red dye.When the pH of solution was 7,the adsorption effect of mesoporous nano-hydroxyapatite for Congo red dye was the best,and the maximum adsorption capacity could reach 183.77mg/g.It was known through model fitting that the adsorption process of Congo red by mesoporous nano-hydroxyapatite conformed to the quasi-second-order kinetic model and Langmuir isothermal adsorption model,which belonged to a spontaneous endothermic process.In conclusion,mesoporous nano-hydroxyapatite could be used as a green biological adsorbent for dye adsorption.