南京大学黎建团队近日实现了利用微电子衍射加速发现稳定的特大孔纳米沸石。相关论文于2025年6月26日发表在《科学》杂志上。

能够处理大分子的具有超大孔隙和纳米尺寸的稳定沸石需求量很大，但很难生产。它们复杂的结构和纳米级晶体尺寸给使用传统X射线衍射技术的分析带来了挑战，导致材料开发效率低下。

研究组报告了NJU120-1和NJU120-2，两种坚固且完全连接的铝硅酸盐纳米沸石，具有超大22环孔的互联通道系统。NJU120-1是一种厚度仅为8纳米左右的纳米片，相当于1.5个晶胞，NJU120-2是一种尺寸为50?250纳米的纳米棒。通过MicroED的快速结构测定，大大加快了它们的合成优化，揭示了其多维孔隙结构。它们的最大自由球直径约为1.2纳米，再加上纳米形态，使大分子能够催化裂解。

附：英文原文

Title: Accelerated discovery of stable, extra-large-pore nano zeolites with micro-electron diffraction

Author: Chao Ma, Zhenghan Zhang, Mengdi Zhang, Xudong Tian, Cong Lin, Lei Han, Guangchao Li, Benedict Tsz Woon Lo, Ka-Fu Yung, Haitao Song, Wei Lin, Miguel A. Camblor, Le Xu, Jian Li

Issue&Volume: 2025-06-26

Abstract: Stable zeolites with extra-large pores and nano dimensions that are capable of processing large molecules are in high demand but have been difficult to produce. Their complex structures and nanoscale crystal sizes present challenges for analysis using conventional x-ray diffraction techniques, leading to inefficiencies in material development. We report NJU120-1 and NJU120-2, two robust and fully connected aluminosilicate nano zeolites featuring interconnected channel systems with extra-large 22-ring pores. NJU120-1 is a nanosheet with only about 8-nanometer thickness, corresponding to 1.5 unit cells, and NJU120-2 is a nanorod with 50 by 250 nanometer dimensions. Their synthesis optimization was greatly accelerated through rapid structure determination with MicroED, revealing their multidimensional pore structures. Their very large largest-free-sphere diameters of approximately 1.2 nanometers coupled with nano morphologies enabled catalytic cracking of large molecules.

DOI: adv5073

Source: https://www.science.org/doi/10.1126/science.adv5073