In photocatalysis water treatments, Heteropoly acids impact is most used to realize effective separation of photo-generated carriers for active degrade organic pollutants. Here, a type of Heteropoly acids used as photocatalyst was prepared, (GHPT) consisted of phosphotungstic acid (PTA) with graphite prepared from a dry battery column and reactivated with hydrochloric acid (GH). Used assays (x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), BET surface area, energy dispersive x-ray (EDS) and element mapping images) were used to demonstrate the properties, composition, and components of the GHPT. To evaluate the catalytic activity of decomposition of methylene blue (MB) using LED light. The rate of MB decomposition can be affected by the type of catalyst, initial concentration of MB dye, removal time, catalyst dose, and pH. GHPT has many advantages for its practical application, through its properties as a photocatalyst in terms of composition and components in the presence of light. The best removal percentage under the best conditions was 99.74 and total organic carbon analysis (TOC) percentage was 88.12 the at a concentration of 1 g/L of catalyst, an initial concentration of 25 ppm MB of MB, an illumination time of 180 minutes and a pH of 10.