The sol-gel/ultrasonically rout produced the novel MnS2-SiO2 nano-hetero-photocatalysts with the various ratio of MnS. Prepared nano-catalyst were investigated in the photo-degradation of methylene blue under UV light illumination. Structural and optical attributes of as-prepared nano-catalysts were evaluated by X-ray diffraction and photoelectron spectroscopy. The morphological were studied by scanning electron microscopy-EDS, and dynamic light scattering. The diffuse reflectance spectroscopy was applied to examine the band gap energy. The E values of SiO, MnS-SiO-0, MnS-SiO-1, and MnS-SiO-2 nanocomposites are 6.51, 3.85, 3.17, and 2.67 eV, respectively. The particle size of the SiO and MnS-SiO-1 nanocomposites were 100.0, and 65.0 nm, respectively. The crystallite size values of MnS-SiO-1 were 52.21 nm, and 2.9 eV, respectively. MnS-SiO nano-photocatalyst was recognized as the optimum sample by degrading 96.1% of methylene blue from water. Moreover, the influence of pH of the solution, and contact time as decisive factors on the photo-degradation activity were investigated in this project. The optimum data for pH and time were found 9 and 60 min, respectively. The photo-degradation capacity of MnS-SiO-2 is improved (96.1%) due to the low band gap was found from UV-vis DRS. The antimicrobial data of MnS-SiO were studied and demonstrated that the MnS-SiO has fungicidal and bactericidal attributes.
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