Application of N-Doped MoS2 Nanocrystals for Removal of Azo Dyes in Wastewater

As persistent and detrimental contaminants, azo dyes are difficult to be removed from wastewater. It is a worldwide challenge to develop efficient technologies for their removal. Adsorption is widely recognized to be a practical, efficient, and low-cost technology for removal of contaminants. Compared with various conventional adsorbents, MoS 2 nanocrystals possess larger specific surface area, higher surface energy, and better adsorptive properties. Since nitrogen-doping is a common approach for modification of materials, N-doped MoS 2 nanocrystals (NDMN) were first used as adsorbents for removal of the azo dye methyl orange. Compared with bulk MoS 2 and MoS 2 nanocrystals, NDMN showed much higher efficiency and reusability. This study provides inspiration for exploring and expanding the applications of NDMN.