Sustainable Scalable Mechanochemical Synthesis of CdS/BiS Nanocomposites for Efficient Hydrogen Evolution.

In the present study, a green, scalable, and environmentally friendly approach was developed for the fabrication of BiS-decorated CdS nanoparticles with an efficient hydrogen generation ability from the water. As a sulfur source, thiourea was used. The process was completed in two stages: mechanical activation and thermal annealing. The presence of spherical CdS nanoparticles and BiS nanorods in the CdS/BiS nanocomposite was confirmed and proved by XRD, Raman spectroscopy, SEM-EDS, and TEM. The synthesized CdS/BiS nanocomposites were evaluated for their photocatalytic hydrogen evolution capabilities. The CdS/BiS photocatalyst exhibited 25% higher photocatalytic activity compared to CdS, reaching a hydrogen evolution rate of 996.68 μmol hg (AQE 0.87%) after 3.5 h under solar-light irradiation.