Sunlight-driven MoS2 nanosheets mediated degradation of dye (crystal violet) for wastewater treatment

The molybdenum disulfide (MoS2) with its visible energy bandgap plays a vital role in treating wastewater from organic pollutants through the photocatalytic process. Here, the one-pot hydrothermal method demonstrates the facile synthesis of the 2H phase of MoS2 nanosheets. The structural and chemical compositional analysis of the nanosheets were performed by the X-ray diffraction (XRD) pattern and FT-IR spectrum, respectively. Morphological analysis of the MoS2 nanosheets was done by the scanning electron microscope (SEM) and high-resolution transmission electron microscope (HR-TEM). The UV-visible absorption spectroscopy was used to examine the catalyst (MoS2) optical properties along with the photodegradation process of the crystal violet (CV) dye. Degradation efficiency is estimated at different concentrations of nanosheets and under different illuminations. The degradation process of the dye follows pseudo-first-order kinetics. Thus, the decomposition of the harmful industrial dye waste in the water is essential for the survival of humanity and aquatic life in the ecosystem. (C) 2021 Elsevier B.V. All rights reserved.