2. Application of MXenes in Water Purification, CO₂ Capture and Conversion

The number of nanomaterials that are suitable for many applications has increased with the 2011 discovery of two-dimensional (2D) transition metal carbides as well as nitrides (MXenes). MXenes are a new class of 2D materials that are quickly gaining popularity for various uses in the fields of medicine, chemistry, and the environment. MXenes but also MXene-composites or hybrids have several desirable properties, including a large surface area, outstanding chemical stability, hydrophilicity, excellent thermal conductivity, and environmental compatibility. MXenes have therefore been utilized in the creation of lithium-ion batteries, semiconductors, and hydrogen storage. The remediation of contaminated groundwater, surface waters, industrial and municipal wastewaters, as well as the capture and conversion of hydrogen, are just a few of the environmental applications where MXenes have recently been used. These applications frequently outperform those for traditional materials. MXene-composites can deionize via Faradaic capacitive deionization (CDI) as well as adsorb a range of organic and inorganic contaminants when employed for electrochemical applications. The applications of MXenes as well as its composites/hybrids for water treatment and CO₂ capture and conversion, are conversed in this chapter as per the literature. We have also discussed the challenges with regard to the utilization of Mxene and its materials in wastewater remediation, along with drawn conclusions.