Dielectric and Conductivity Relaxation of rGO@CdS Nanocomposites via In Situ Assembly of CdS Nanoparticles on an rGO Layer

Cadmium sulfide (CdS) as a multifunction semiconductor is widely known for photocatalysis and solar cell applications. Herein, CdS nanoparticles were successfully fabricated in situ on a graphite oxide (GO) layer by a low-cost chemical bath deposition method. Here, GO acts as a "substrate." The microstructure and morphology of the nanocomposites with different amounts of GO added were studied via a series of characterization approaches. It was found that the size of CdS nanoparticles and the degree of reduction of GO can be effectively regulated by controlling the amount of GO added. Finally, the dielectric and conductivity relaxation of nanocomposites was studied. Two visible relaxation processes occurred in the low and high frequencies, and the cause of relaxation was explored.