One-step hydrothermal synthesis and photocatalytic activity of SnO2/rGO nanocomposites: effects of pH values

In this study, tin oxide /reduced graphene (SnO2/rGO) samples were prepared by hydrothermal method. The structural characteristics, phase composition, morphology, and size of the studied X-ray diffraction, Raman scattering spectroscopy, scanning electron microscopy. Results showed that SnO2 nanoparticles had tetragonal rutile crystal structure with a ranging from 4.65 nm to 5.77 when pH was increased 5 9. nanoparticle morphology together rGO layers observed in FESEM image these samples. absorption spectra SnO2/rGO show characteristic peak at 296 nm, which band gap value material decreased 4.91 eV 4.81 simultaneous formation two phases demonstrated spectroscopy. Photocatalytic degradation methylene blue reached 86% after 90 min under visible light.