Abstract <p>In this study, the focus is to prepare sustainable and cheap materials for advanced technology towards the humanity development. We chose the starting material as easily and abundantly availability. Straightforward sol–gel method in a household microwave oven was used to synthesize tin oxide (SnO₂) nanoparticles. The characterization of resulting SnO₂ was conducted using a range of spectroscopic techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet spectroscopy (UV), fourier transform infrared spectroscopy (FTIR), and photoluminescence spectroscopy (PL). These methods provided comprehensive insights into the material’s structural, morphological, and optical properties, allowing for a detailed analysis of its characteristics. Thus, prepared SnO₂ nanoparticles were identified with a tetragonal rutile phase (JCPDS card no: 77-0451), with a crystalline size of 30.42 nm. Based on the SEM micrograph, the size evolved in the end material was comparable. The UV-visible spectrum shows a direct bandgap of 2.6 eV. PL spectra of the sample reveal the presence of SnO₂ with strong emissions in the UV region which leads to the use in a UV dye experiment. UV property of the SnO₂ was utilized for photocatalytic degradation of methylene blue and was studied under visible light irradiation. The degradation efficiency was excellent and was found to be 85.6%. Therefore, this is a simple synthesized nanomaterial for use in green environmental chemistry for future study.</p>