ITQ-2分子筛的合成与表征  

Synthesis and Characterization of ITQ-2 Zeolite

作　　者：王保玉[1] Wang Baoyu(College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China)

机构地区：[1]洛阳师范学院化学化工学院,河南洛阳471934

出　　处：《洛阳师范学院学报》2025年第2期10-14,共5页Journal of Luoyang Normal University

摘　　要：以十六烷基三甲基溴化胺(CTMABr)和四丙基氢氧化铵(TPAOH)为插层剂,对MCM-22(P)进行插层使其膨胀,然后通过对已膨胀的MCM-22(P)进行超声剥离合成了ITQ-2分子筛,利用XRD、FT-IR、SEM、BET分析测试技术对制备的ITQ-2分子筛进行了表征.结果表明,在TPA^(+)的帮助下,CTMA^(+)对层状前驱体MCM-22(P)的插层反应在2 h内即可完成;硅铝比越大,插层越容易,剥离越完全;合成的ITQ-2分子筛具有很大的比表面积和很高的S_(外)/S_(内),并且还有很宽的介孔分布.Cetyltrimethylammonium bromide(CTMABr)and tetrabutylammonium hydroxide(TPAOH)were used as intercalating agents to expand MCM-22(P)by intercalation.Subsequently,ITQ-2 zeolite was synthesized by ultrasonic exfoliation of the expanded MCM-22(P),and the synthesized ITQ-2 zeolite was characterized using X-ray diffraction(XRD),Fourier-transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),and Brunauer-Emmett-Teller(BET)analysis techniques.The result shows that the intercalation reaction of CTMA^(+)into the layered precursor MCM-22(P)can be completed within two hours with the assistance of TPA^(+).Meanwhile,the intercalation is easier and the exfoliation is the more completed with the larger Si/Al ratio.Furthermore,the synthesized ITQ-2 zeolite presents a large specific surface area,and a high ratio of external surface area and internal surface area,along with a broad mesopore distribution.

关 键 词：ITQ-2分子筛 水热合成 插层膨胀 超声剥离 

分 类 号：O643[理学—物理化学]