Heavy metals are non-biodegradable and have a high toxicity effect on microorganisms which makes their presence in the environment extremely dangerous. The method of handling heavy metal waste by photocatalysis techniques using TiO₂/SiO₂ composite showed a good performance in reducing harmful pollutants. In this study, SiO₂ from Bengkulu beach sand, Indonesia, was used as a support material for TiO₂ photocatalyst to remove Cr(VI) and Pb(II). SiO₂ was obtained through leaching techniques using NaOH as a solvent. The TiO₂/SiO₂ composite photocatalyst was synthesized using a solvothermal method at 130 °C and then characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and a particle size analyzer (PSA). Based on the XRD diffractogram, the synthesized TiO₂ showed the anatase structure while the SiO₂ showed the amorphous structure. The Ti–O–Si bond is defined in the infrared (IR) spectra, which indicates that the relationship between TiO₂ and SiO₂ is a chemical interaction. The results of SEM and PSA characterizations show agglomerated spherical (round) particles with a mean particle size of 616.9 nm. The TiO₂/SiO₂ composite of 7:1 ratio showed the highest photocatalytic activity after 180 min of ultraviolet (UV) irradiation, with a concentration-decrease percentage of 93.77% and 93.55% for Cr(VI) and Pb(II), respectively.