摘要
采用双季铵盐模板剂溴代1,4-二氮甲基哌啶基-丁烷,通过动态水热晶化法成功制备了纳米级ZSM-12分子筛。采用X射线衍射、扫描电镜、透射电镜、红外光谱分析及N2吸附-脱附技术等测试方法对所得颗粒进行了研究。所合成的颗粒呈长条形状,长约150 nm,宽约30 nm。所得的ZSM-12沸石结晶体结构完整,无明显骨架缺陷,富含微孔和介孔孔隙。介孔孔隙来源于ZSM-12纳米晶粒之间的堆积孔隙。在酸分布上,所得的HZSM-12分子筛的中强酸及B酸比例较多,使得该沸石在催化反应中具备优良的反应活性。
Using diquaternary alkylammonium ions 1,4-bis（N-methylpiperidinium） butane bromide as structure-directing agent,ZSM-12 zeolites with nanosized particle diameter were successfully synthesized by dynamic hydrothermal method. The zeolite particles were characterized by XRD,SEM,TEM,NMR,IR and N2-adsorption. The results show that synthesized particles are strip-like, primary particle size is about 150 nm long and 30 nm wide;NMR showed that prepared ZSM-12 zeolites have not obvious skeletal defects. The samples are rich in micropores and mesopores, the mesopores are the result of accumulation between ZSM-12 nanocrystals. The results of acid distribution indicate that HZSM-12 has high concentration of mid-strong acid and br？nsted acid, and this property would make it more activity in some catalytic reactions.
出处
《当代化工》
CAS
2015年第5期881-884,共4页
Contemporary Chemical Industry
基金
中国石油化工股份有限公司项目(YK512034)
关键词
双季铵盐
动态水热法
ZSM-12
纳米
条状
Diquatemary alkylammonium ions
Dynamic hydrothermal method
ZSM-12
Nanosized
Strip-like
