| 使用双子表面活性剂合成纳米层状MFI分子筛(英文) |
| Synthesis of Nano Hierarchical MFI by Using a Gemini Surfactant |
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| 摘要: 使用双子表面活性剂(C18-6-6Br2)合成了纳米层状MFI分子筛，这种表面活性剂是由溴代十八烷合成。对沸石样品用X-射线衍射(XRD)，低温N2吸附-脱附，扫描电子显微镜(SEM)和透射电子显微镜(TEM)进行了表征。由N2物理吸附的数据可以得出由双子表面活性剂制备的样品具有高的N2吸附量和外比表面积。其比表面积 (454 m2·g-1)远高于传统MFI分子筛，同时它的外表面积占了比表面积的50%以上。纳米层状分子筛在a-c平面拥有清晰且广阔的平面区域，但是沿着b轴的骨架的厚度却相当小。纳米层状NSUCH MFI(Nano hierarchical MFI)分子筛的催化性能以氮氧化物的催化净化来评估。结果表明，样品有着很好的去除氮氧化物的催化性能，在350 ℃时氮氧化物的转化率达到了100%。 |
| 关键词: 层状MFI 溴代十八烷 双子表面活性剂 氮氧化物 |
| 基金项目: |
| Abstract: Nano hierarchical MFI zeolite (NSUCH MFI) was synthesized using a gemini surfactant (C18-6-6Br2) prepared from 1-Bromooctadecane and characterized by XRD, low temperature N2 adsorption-desorption, SEM and TEM. As revealed by N2 physisorption, The title MFI samples exhibit significantly higher amounts of N2 adsorption. And the BET surface area of the material is 454 m2·g-1 with more than 50% of the overall surface area being external surface area. The synthesized MFI nanosheets are wide in the a-c plane and 2 nm thick along the b axis. The catalytic removal of nitrogen oxides was used to evaluated the catalytic properties of the NSUCH MFI zeolite. The results show that the sample exhibits an excellent catalytic performance for nitrogen oxides removal. The conversion of nitrogen oxides at 350 ℃ is 100%. |
| Keywords: hierarchical MFI 1-bromooctadecane gemini surfactant nitrogen oxides |
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| 李 振,何 凯,阎智锋,娄晓荣,李 哲,黄 伟.使用双子表面活性剂合成纳米层状MFI分子筛(英文)[J].无机化学学报,2012,28(5):1009-1014. |
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