Login / Signup

Hierarchically porous and single Zn atom-embedded carbon molecular sieves for H 2 separations.

Leiqing HuWon-Il LeeSoumyabrata RoyAshwanth SubramanianKim KisslingerLingxiang ZhuShouhong FanSooyeon HwangVinh T BuiThien TranGengyi ZhangYifu DingPulickel M AjayanChang-Yong NamHaiqing Lin
Published in: Nature communications (2024)
Hierarchically porous materials containing sub-nm ultramicropores with molecular sieving abilities and microcavities with high gas diffusivity may realize energy-efficient membranes for gas separations. However, rationally designing and constructing such pores into large-area membranes enabling efficient H 2 separations remains challenging. Here, we report the synthesis and utilization of hybrid carbon molecular sieve membranes with well-controlled nano- and micro-pores and single zinc atoms and clusters well-dispersed inside the nanopores via the carbonization of supramolecular mixed matrix materials containing amorphous and crystalline zeolitic imidazolate frameworks. Carbonization temperature is used to fine-tune pore sizes, achieving ultrahigh selectivity for H 2 /CO 2 (130), H 2 /CH 4 (2900), H 2 /N 2 (880), and H 2 /C 2 H 6 (7900) with stability against water vapor and physical aging during a continuous 120-h test.
Keyphrases
  • room temperature
  • single molecule
  • physical activity
  • capillary electrophoresis
  • sewage sludge
  • mental health
  • air pollution
  • mass spectrometry
  • carbon dioxide
  • solid state
  • tissue engineering