Synthesis and characterization of MnS2/reduced graphene oxide nanohybrids for with photocatalytic and antibacterial activity

- MnS2/reduced graphene oxide nanohybrids were synthesized by hydrothermal method.
- MnS2/r-GO nanohybrids exhibited photocatalytic property under UV light irradiation.
- MnS2/r-GO nanohybrids obtained have best properties in biomedical applications.

A facile one-step hydrothermal route was developed here to prepare MnS2/reduced graphene oxide nanohybrids. The crystal morphologies could be controlled by adjusting the solvent, surfactant, and pH of the precursor solution. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), UV-Vis absorption spectra, and photoluminescence spectra (PL), were used to characterize the structures of the samples were used to characterize the structures of the samples, and the specific surface area was determined using the Brunauer-Emmett-Teller (BET) method. The thickness of the MnS2 nanoparticles and MnS2/reduced graphene oxide nanohybrids were measured to be about 20 and 5 nm, respectively. The total pore volume and specific surface area were 0.540 and 1.173 cm3 g− 1 and 45.91 and 98.23 m2 g− 1 for pure MnS2 and MnS2/r-GO hybrids, respectively. Carbophenothion as an insecticide photodegradation was used to estimate the photocatalytic activity of the MnS2/reduced graphene oxide nanohybrids morphologies under UV light. The Carbophenothion hardly decomposed during photolysis over a period of 45 min. The rate constant, k value, for the photocatalysis of Carbophenothion by MnS2/reduced graphene oxide nanohybrids under UV light radiation is 0.134 min− 1. The antibacterial properties of the nanohybrids were evaluated by determining their minimum inhibitory and bactericidal concentrations (MIC and MBC), using a broth microdilution assay for Escherichia coli (E. coli) bacteria. The MIC and MBC values are 4.0 and 32.0 μg/mL.