采用水热合成方法,在膨胀石墨（EG）的孔壁内部和表面合成沸石,制备EG/Na-X型沸石复合材料,研究了SiO2/Al2O3摩尔比对沸石类型的影响。采用XRD、FE-SEM、FTIR、N2吸附-脱附等温线及静态保干器法对制得的复合材料进行表征。结果表明：沸石类型受SiO2/Al2O3摩尔比影响较大,随SiO2/Al2O3摩尔比的增加,沸石类型逐渐由Na-A型向Na-X型转变,在摩尔比SiO2/Al2O3=7.9时,Na-A型沸石全部转变为呈八面体形状的Na-X型沸石。吸附温度为25℃时,EG/Na-X型沸石复合材料对苯气体的静态饱和吸附量可达340mg/g。
Zeolite was synthesized on the surface and interior pores of expanded graphite（EG） by hydrothermal method and a new EG/Na-X zeolite composite was prepared.The effect of SiO2/Al2O3 molar ratio on the types of zeolite was investigated.Microstructures of the composite were characterized using XRD,FE-SEM,FTIR and N2 adsorption-desorption techniques.The static desiccator method was used for adsorption capacity measurement.The results indicate that the types of zeolite are dependent on SiO2/Al2O3 molar ratio.With the increase of SiO2/Al2O3 molar ratio,types of zeolite transform from Na-A to Na-X gradually and transform completely when the SiO2/Al2O3 molar ratio is 7.9.Adsorption datas show that static adsorption capacity of the composite for benzene gas can reach 340mg/g at the temperature of 25℃.
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