▎ 摘　　要

Graphene oxide as suitable support material was employed for the synthesis of GO-MnO2 nanocatalyst via a greener solution combustion route. Rod-like MnO2 was found to be uniformly adhered to both sides of graphene oxide (GO) sheets. The nanocatalyst was thoroughly characterized using different instrumental methods such as X-ray diffraction (XRD), N-2 adsorption-desorption, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) with EDS mapping, UV-visible spectroscopy and Thermogravitometric (TG) analysis. From the experimental results, GO-MnO2 was found to be a potential catalyst for chalcones preparation via Claisen-Schmidt condensation. The catalytic activity of GO-MnO2 nanocatalyst was found to be superior as compared to pure MnO2 and GO. The reaction conditions were varied thoroughly by changing several reaction parameters like the solvent polarity, temperature, and catalyst wt%. High yield of chalcones was obtained in a short period of time at 110 degrees C under solventless conditions. The catalyst was easy to separate and was reused multiple times with minor change in activity. On comparing the activity with other reported catalyst in literatures it was revealed that GO-MnO2 nanocatalyst has significantly high activity in lesser period of time.