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基于H3PMo12O40修饰一例MOF复合材料及对染料的吸附

Fine Chemicals(2016)

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Abstract
采用溶剂热法,以H3PMo12O40和金属有机骨架[Cu3(BTC)2,BTC=均苯三甲酸根]为原料构筑一例金属有机骨架复合材料[H3PMo12O40@Cu3(BTC)2]·xG(G=客体分子),并采用IR、XRD、SEM、TG、BET进行表征.研究其对水溶液中亚甲基蓝(MB)的吸附性能,并探讨了初始pH、温度、不同初始浓度的MB对吸附容量的影响.结果表明降低温度和降低溶液的初始pH值有利于亚甲基蓝的吸附.等温吸附模型符合Langmuir等温吸附模型,动力学符合拟二级动力学.热力学参数△G <0,△H<0和△S >0,表明H3PMo12O40@Cu3(BTC)2对亚甲基蓝的吸附是自发和放热的,除此之外对甲基紫、罗丹明B、孔雀石绿、碱性品红等阳离子染料也有良好的吸附性能.
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