降氡活性炭微结构的X射线衍射研究

Structural Studies of Some Activated Carbons with Different Radon Adsorption Ability by X-ray Diffraction Techniques

测定了四种活性炭对氡的动态吸附系数,其值有较大差距,对这四种活性炭进行了X射线衍射分析。对测得的X射线衍射强度谱,经过空气散射、自吸收和偏振校正后,利用Scherrer和Hirsch方法计算其微晶结构参数。结果表明,不同降氡性能的活性炭其微晶参数有较大差距,实验表明微晶尺度Lc为1.7 nm,La为1.9 nm,层叠数量为4的活性炭对氡有较强的吸附性能。

Four different activated carbons with different radon adsorption ability were analyzed by X-ray diffraction techniques.Microcrystal parameters were calculated by Scherrrer and Hirsch equations.The results show that the activated carbon with microcrystal parameters at =1.7 nm,=1.9 nm,average layers =4 has the stronger adsorption ability in the for carbon samples,which can be referred when developing activated carbons for radon adsorption.