Abstract
Nanocatalysts revolutionize organic chemistry for the conversion of various
organic reactions to obtain a high yield, low hazard and stability. It plays an important
role in the transformation of organic reactions due to its high surface area, small size,
and low reaction time. Therefore, green methodology, both in the synthesis of
nanocatalysts and organic transformation reactions, is an advanced technology, and
findings promise results. Many scientists all over the world synthesised nanoparticles
and used them as catalysts in Knoevenagel condensation. In this book chapter, we
documented the synthesis and characterisation techniques of the homo/hetero metallic
nanocatalyst and applied it in the Knoevenagel condensation reaction for its reusability
and easy separation after a chemical reaction because, in organic chemistry, separation
is a tedious job for finding pure compounds.