Researchers in Malaysia combined two zeolitic imidazolate frameworks, ZIF-7 and ZIF-67, into a composite that captures more CO2 than either material alone. The 75:25 blend adsorbed 2.63 mmol of CO2 per gram, compared with 1.91 for pristine ZIF-7 and 1.03 for ZIF-67. Notably, the best performer did not have the largest surface area, which suggests pore flexibility and accessibility matter more than raw BET numbers. Published in the Journal of Materials Science, the work points to a practical design lever for post-combustion capture: blend two frameworks with complementary pore behavior instead of searching for a single high-surface-area material. The authors used X-ray diffraction and spectroscopy to confirm both crystal structures stayed intact. Real-world impact still depends on testing under flue gas conditions, cycling stability, and regeneration energy.
