The synthesis of manganese oxide and magnetic sand nanocomposites was reported in this study. The MnO2 nanoparticles was synthesized using biological approach in which aqueous Cassia tora leaf extract was used to bioreduced potassium permanganate (KMnO4) to manganese oxide and characterized using Fourier Transformation Infrared (FTIR) spectroscopy, UV-visible spectrophotometer, XRD and SEM. The UV-visible spectrophotometer gave an absorption at 290 nm, while the crystalline size was obtained from XRD technique. Physical method was adopted for magnetics sand synthesis using Tema vibrating mill. This was achieved by Agate Moter before sieving through 63 microns’ sieve. The formed magnetic sand was characterized using FTIR, XRD, X-ray fluorescent (XRF). The result of the XRD shows that the crystalline size of the particles. The XRF shows that the sand contains high percentage of SiO2 about 70.16%. The photocatalytic activities of manganese oxide and magnetic sand nanocomposites were carried out for the degradation of methyl orange.  The result shows that the nanocomposite can be used for the degradation of methyl orange and can be reused for a series of cycles without a significant decrease in the degradation ability.