<p>In the current manuscript, we have developed an unique calcination free synthesis of Mn₃O₄ nanoparticles. The developed protocol is a one pot synthesis of Mn₃O₄ at relatively low temperature than many other reported protocols in the literature. The reported synthesis methodology involves microwave route and involves only 1,4-butanediol and Mn acetate as a metal oxide precursor. It eliminates the need for high temperature calcination, pH adjustments, toxic precursors such as KMnO₄, external stabilizers, or surfactants, and additional reducing and oxidizing agents. Synthesized Mn₃O₄ nanoparticles were studied by using different analytical tools, X-ray diffraction, X-ray photoelectron spectroscopy analysis, Raman spectroscopy, field emission scanning electron microscopy, and high resolution-transmission electron microscopy to evaluate their morphology and physicochemical properties. As-prepared Mn₃O₄ nanoparticles act as an efficient catalyst for catalytic transfer hydrogenation of furfural to give furfuryl alcohol in good yield, i.e. 87% under optimal conditions. In this catalytic transfer hydrogenation, isopropyl alcohol acts as a source of hydrogen. The synthesized nanocatalyst was reusable upto 5 cycles without much loss in its activity.</p>