Building Close Ties Between CO₂ and Functional Two‐Dimensional Nanomaterials with Green Chemistry Strategy

Two‐dimensional nanomaterials represented an emerging class of nanomaterials that have attracted dramatically increasing attention in both academia and industries. With the development of green chemistry, supercritical carbon dioxide with unique properties can be used as excellent reaction media for two‐dimensional nanomaterials preparation and processing. In this review, we summarize the recent state‐of‐art progress on the ultrathin two‐dimensional nanomaterials fabricated with the assistance of supercritical carbon dioxide, including carbon dioxide‐induced liquid exfoliation, phase engineering, and the formation of amorphous materials, as well as the construction of heterostructures and novel functional nanomaterials. Based on the potential and versatility of supercritical carbon dioxide in materials processing and synthesis, we will also give some personal perspectives on the existing challenges and future research directions.