SBA-15负载钼磷酸铵材料的原位合成及其对Cs+的吸附性能研究  

In-suit synthesis of SBA-15supported ammonium phosphomolybdate/and their adsorption for Cs^+

作　　者：孙春艳[1] 程建英[1] 张兴儒[1] 

机构地区：[1]青海大学化工学院,西宁810016

出　　处：《化工新型材料》2014年第7期111-113,共3页New Chemical Materials

基　　金：国家自然科学基金(21266027);教育部重点科学技术研究项目(211191);青海省国际科技合作项目(2012-H-803)

摘　　要：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。AMP/SBA-15 composite material was prepared by in-suit hydrothermal synthesis method. The resultant material was characterized by infrared spectroscopy, powder X-ray diffraction, scanning electron microscope and N2 adsorption-desorption. The adsorption of Cs^＋ from aqueous solution by AMP/SBA-15 was investigated. The results showed that the AMP was loaded well in SBA-15 by this method. AMP/SBA-15 could keep the complete skeleton structure during adsorption and desorption,and the surface area and pore volume could nearly recover after desorption. Equilibrium adsorption time to Cs^＋ was 3 days, the maximum adsorption capacity was up to 54. 3248mg/g, the maximum desorption ratio was 72 %. The adsorption process attributed to pseudo second-order kinetics model and the equilibrium isotherm for Cs^＋ uptake corresponded closely to the Freundlich model.

关 键 词：SBA-15 钼磷酸铵 Cs^+ 吸附性能 

分 类 号：O647.3[理学—物理化学]