Ma Ye, Tang Xiaomin, Hu Junyi, Ma Yanhang, Chen Wei, Liu Zhiqiang, Han Shichao, Xu Cheng, Wu Qinming, Zheng Anmin, Zhu Longfeng, Meng Xiangju, Xiao Feng-Shou
Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310007, China.
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.
J Am Chem Soc. 2022 Apr 13;144(14):6270-6277. doi: 10.1021/jacs.1c12338. Epub 2022 Mar 10.
Zeolite nanosheets with excellent mass transfer are attractive, but their successful syntheses are normally resulted from a huge number of experiments. Here, we show the design of a small organic template for the synthesis of self-pillared pentasil (SPP) zeolite nanosheets from theoretical calculations in interaction energies between organic templates and pentasil zeolite skeletons. As expected, the SPP zeolite nanosheets with the thickness at 10-20 nm have been synthesized successfully. Characterizations show that the SPP zeolite nanosheets with about 90% MFI and 10% MEL structures have good crystallinity, the house-of-card morphology, large surface area, and fully four-coordinated aluminum species. More importantly, methanol-to-propylene tests show that the SPP zeolite nanosheets exhibit much higher propylene selectivity and longer reaction lifetime than conventional ZSM-5 zeolite. These results offer a good opportunity to develop highly efficient zeolite catalysts in the future.
具有优异传质性能的沸石纳米片很有吸引力，但其成功合成通常源于大量实验。在此，我们通过理论计算有机模板与五元环沸石骨架之间的相互作用能，展示了一种用于合成自支撑五元环（SPP）沸石纳米片的小型有机模板的设计。不出所料，成功合成了厚度为10 - 20纳米的SPP沸石纳米片。表征表明，具有约90% MFI和10% MEL结构的SPP沸石纳米片具有良好的结晶度、纸牌屋形态、大表面积和完全四配位的铝物种。更重要的是，甲醇制丙烯测试表明，与传统ZSM - 5沸石相比，SPP沸石纳米片表现出更高的丙烯选择性和更长的反应寿命。这些结果为未来开发高效沸石催化剂提供了良好机遇。
