In this study, we successfully synthesized silicon nano-dioxide by modifying the conventional sol–gel method, eliminating the use of water as a hydrolysis agent and using oxalic acid as a reagent and structural reaction agent. The analytical results reveal that the product has a high purity and a coherent molecular structure. X-ray diffraction (XRD) analysis revealed a broad peak with an angle of 22.5°, indicating the morphosyntactic structure. Fourier transform infrared spectroscopy (FTIR) confirmed the presence of silicon dioxide bonds, while atomic force microscopy (AFM) revealed significant differences in surface morphology. In contrast to the typical spherical shape of silicon nano-dioxide, the surface of the synthesized silicon dioxide shows a mountainous terrain with marked peaks and valleys, with the distance between the lowest and highest points being less than 10 nanometers, indicating the small size of the nanocrystals. Ultraviolet (UV) spectroscopy revealed a distinct peak at a wavelength of 266 nm, corresponding to a small energy gap of 3.8 electron volts. This result shows that the synthesized solid has a semi-conductive character, unlike conventional silicon oxides, which are characterized by their insulating properties. Additionally, the unique morphology of the synthesized silicon dioxide nanoparticles suggests potential applications in various fields such as electronics, photonics, and catalysis. The modified sol–gel method employed in this study offers a novel approach to synthesizing silicon dioxide nanoparticles with tailored properties, paving the way for future research and development in nanotechnology.