以自制氢氧化钛和碳酸铯为原料,采用高温固相法制备了离子筛前驱体Cs2Ti6O13,用0.2mol/L盐酸对离子筛前驱体进行酸改型,得到铯离子筛。并通过XRD、SEM、TEM、N2吸附脱附等方法表征,考察了铯离子筛的形貌及吸附选择性能。结果表明,在焙烧温度为800℃、铯钛摩尔比为1:1.5条件下制得的铯离子筛呈片状型貌,分散均匀,结构稳定;对铯的饱和交换容量为311.4mg/g,5次循环吸附脱附后,铯离子筛的交换量维持在初始吸附量的79.51%以上,可以循环使用。
The ion sieve precursor Cs2Ti6O13 was prepared by high temperature solid phase method with self-made titanium hydroxide and cesium carbonate,and modified with 0.2mol/L hydrochloric acid to obtain cesium(Cs) ion sieve.The resulant product was characterized by XRD,SEM,TEM and N2 adsorption/desorption.The morphology and adsorption selectivity were investigated.The results showed that the ion sieve calcined at 800℃ and molar ratio of Cs to Ti 1:1.5 had schistose appearance,uniform dispersion and stable structure.The saturated exchange capacity of Cs was 311.4mg/g,after five cycles of adsorption and desorption,the exchange capacity of the ion sieve was maintained at more than 79.51% of the initial adsorption capacity,which could be recycled.
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