A 36-ring zeolite with intrinsic cylindrical mesopores

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Abstract
Stable extra-large-pore zeolites are highly desirable for catalysis and molecular separation, but most remain microporous, limiting their effectiveness for bulky substrates. Among the few extra-large-pore zeolites that exhibit mesoporosity, the pores typically form as elongated, noncircular pore apertures. We report that NJU120-6, a stable silicate zeolite with an intrinsic cylindrical mesoporous system, has the currently largest 36-ring windows with a free diameter of 25.71 angstroms by 19.12 angstroms. NJU120-6 exhibits the lowest framework density of 9.39 silicon atoms per cubic nanometer and a pore volume of 0.66 cubic centimeters per gram. It remains stable up to 1173 kelvin and can incorporate aluminum and titanium, enabling superior performance in catalytic cracking and in liquid-phase alkene oxidation of bulky molecules, respectively.
Funding Information
  • National Natural Science Foundation of China (22371121)
  • National Natural Science Foundation of China (22403080)
  • National Natural Science Foundation of China (2024YFA1510000)
  • National Natural Science Foundation of China (U25D9013)
  • National Natural Science Foundation of China (22272079)
  • Government of Jiangsu Province (BK20230772)
  • Government of Jiangsu Province (SK-1302-2023-013)
  • Government of Jiangsu Province (BG2024018)
  • Central University Basic Research Fund of China (0205-14380334)
  • Beijing National Laboratory for Molecular Sciences (BNLMS202402)
  • the Start-up Fund for RAPs under the Strategic Hiring Scheme of The Hong Kong Polytechnic University (P0047841)
  • National Key Research and Development Program of China (2024YFA1510301)

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