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采用十二胺为模板剂、氨水做沉淀剂成功制备了介孔α-Fe2O3,通过粉末X射线衍射(XRD)、透射电镜(TEM)、N2吸附/脱附技术对样品晶相、形貌和比表面积进行了表征.根据介孔α-Fe2O3悬浮液的酸碱滴定数据,使用FITEQL软件,采用双电层恒电容模型计算得出了介孔α-Fe2O3的表面酸碱反应平衡常数.在此基础上研究了Cu2+,Pb2+,Zn2+在介孔氧化铁表面的吸附行为,使用WinSGW软件模拟得出了相应的表面配合反应平衡常数并讨论了其吸附机理.
Mesoporous α-Fe2O3 was successfully prepared by using dodecylamine as templating agent and ammonia as precipitant. The crystal phase, morphology and morphology of the samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption / desorption The surface area of the mesoporous α-Fe2O3 mesoporous silica was characterized.According to the acid-base titration data of the mesoporous α-Fe2O3 suspension, the surface acid-base equilibrium constant of the mesoporous α-Fe2O3 was calculated by using the FITEQL software and the electric double layer constant capacitance model The adsorption behaviors of Cu2 +, Pb2 + and Zn2 + on the surface of mesoporous iron oxide were studied. The corresponding reaction equilibrium constants were obtained by using WinSGW software and the adsorption mechanism was discussed.