杂化材料Cu(2,2-bipy)33(P2W18O62)的制备及其对亚甲基蓝的吸附性能研究

摘要

A hybrid material[Cu(2,2′-bipy)3]3(P2W18O62)was synthesized by chemical coprecipitation method,characterized by FT IR,EDS,and so on.Its adsorption ability of methylene blue(MB)was studied in aqueous solutions, and the influences of the experimental conditions was explored, including pH, initial concentration and temperature.The result showed that the low pH and high temperature were benefit to the adsorption of MB onto[Cu(2,2′-bipy)3]3(P2W18O62).From the experiment data, the Langmuir isotherm model and pseudo-sencond-order kinetic model was fitted the adsorption process.Thermodynamic parametars (ΔG0<0,ΔH0>0 and ΔS0>0), illustrated that the adsorption progress was spontaneous and endothermic, the complexes towards other cationic dyes such as rhodamine B also showed good adsorption properties.%采用化学共沉淀法制备杂化材料[Cu(2,2′-bipy)3]3(P2W18O62),其结构采用FT IR等手段进行表征,利用亚甲基蓝(MB)溶液为探针进行材料吸附性能的探究,并探究了pH值,染料初始浓度及温度等条件对吸附性能的影响.结果表明低pH和高温有利于该材料对MB的吸附.由实验进一步分析可知,该吸附过程分别符合Langmuir吸附等温模型和二级动力学模型.其热力学参数(ΔG0<0,ΔH0>0和ΔS0>0)表明该吸附过程是自发吸热的,通过探讨对系列染料的吸附性能探讨可知,[Cu(2,2′-bipy)3]3(P2W18O62)对阳离子型染料如罗丹明B等都有较好的效果.