Low-concentration CO 2 capture using metal-organic frameworks - current status and future perspectives.

The ever-increasing atmospheric CO 2 level is considered to be the major cause of climate change. Although the move away from fossil fuel-based energy generation to sustainable energy sources would significantly reduce the release of CO 2 into the atmosphere, it will most probably take time to be fully implemented on a global scale. On the other hand, capturing CO 2 from emission sources or directly from the atmosphere are robust approaches that can reduce the atmospheric CO 2 concentration in a relatively short time. Here, we provide a perspective on the recent development of metal-organic framework (MOF)-based solid sorbents that have been investigated for application in CO 2 capture from low-concentration (<10 000 ppm) CO 2 sources. We summarized the different sorbent engineering approaches adopted by researchers, both from the sorbent development and processing viewpoints. We also discuss the immediate challenges of using MOF-based CO 2 sorbents for low-concentration CO 2 capture. MOF-based materials, with tuneable pore properties and tailorable surface chemistry, and ease of handling, certainly deserve continued development into low-cost, efficient CO 2 sorbents for low-concentration CO 2 capture.