论文部分内容阅读
采用原位水热合成法制备了钼磷酸铵/分子筛复合材料(AMP/SBA-15),通过红外光谱、X射线衍射、扫描电子显微镜和N2吸附等手段对材料进行了表征,并考察了AMP/SBA-15对水溶液中Cs+的吸附性能。结果表明,Keg-gin结构的AMP可较好地负载于SBA-15中,并在吸附实验中保持完整的结构。该材料对Cs+的平衡吸附时间为3d,平衡吸附量为54.3248mg/g;Cs+最大脱附率为72%,脱附后材料的比表面积和孔容可基本复原;吸附动力学符合准二阶动力学模型,吸附等温线符合Freundlich模型。
Ammonium molybdate / molecular sieve composites (AMP / SBA-15) were prepared by in-situ hydrothermal synthesis. The materials were characterized by means of IR, X-ray diffraction, scanning electron microscopy and N2 adsorption. / SBA-15 for Cs + adsorption in aqueous solution. The results showed that the AMP of Keg-gin structure was well supported in SBA-15 and the intact structure was maintained in the adsorption experiments. The equilibrium adsorption time of Cs + is 3d, the equilibrium adsorption capacity is 54.3248mg / g, the maximum desorption rate of Cs + is 72%, the specific surface area and pore volume of the material can basically recover after desorption. The adsorption kinetics follows quasi-second order The kinetic model and adsorption isotherm fit the Freundlich model.