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The continuous release of CO₂ into the atmosphere as a major cause of increasing global warming has become a growing concern for the environment. Accordingly, CO₂ absorption through an approach with maximum absorption efficiency and minimum energy consumption is of paramount importance. Thanks to the emergence of nanotechnology and its unique advantages in various fields, a new approach was introduced using suspended particles in a base liquid (suspension) to increase CO₂ absorption. This review article addresses the performance of nanofluids, preparation methods, and their stability, which is one of the essential factors preventing sedimentation of nanofluids. This article aims to comprehensibly study the factors contributing to CO₂ absorption through nanofluids, which mainly addresses the role of the base liquids and the reason behind their selection.