**4. Conclusion**

In recent days, the metal nanoparticles supported carbon nanocomposites are found to play a significant role in a wide range of potential applications. Due to unique properties including high surface area, the carbon nanocomposites are often used as an efficient heterogeneous catalyst for industrially important organic reactions. In order to achieve carbon nanocomposites with excellent physicochemical properties, several methods have been developed so far. In this chapter, we have summarized the recent progress in the research on the preparation methods of carbon nanocomposites (mainly, graphene or graphene oxide and CNTs) and its uses in organic reactions.

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