In this thesis, ? -zirconium hydrogen phosphate nanoparticles as an effective, eco-friendly and recyclable support for homogenous catalysts were prepared. Polyvinylpyrrolidone (PVP) was used as the organic matrix, dispersing agents and acted as a template for the nanoparticles. It seems the H-bonds between ZrHP and PVP along polymer chains lead to a better dispersion of in situ formed ZrHP. Pure ? -ZrHP nanoparticles were obtained after calcination of PVP/ZrHP. The different types of heterogeneous catalysts were prepared and characterized by several physico-chemical techniques such as BET, EDX, ICP-OES, XRD, FT-IR, SEM and TEM. The activity of catalysts was studied in some organic reactions such as Morita-Baylis-Hillman reaction, Dakin-West reaction, Mizoroki-Heck reaction and synthesis of benzimidazoles. These catalysts showed excellent catalytic activity and the proper recovery and reusability.
