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## Abstract The g-C~3~N~4~ nanosheet was prepared by calcination method, the MoS~2~ nanosheet was prepared by hydrothermal method. The g-C~3~N~4~/MoS~2~ composites were prepared by ultrasonic composite in anhydrous ethanol. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectroscopy (UV-Vis), and photoluminescence (PL) techniques were used to characterize the materials. The photocatalytic degradation of Rhodamine B (Rh B) by g-C~3~N~4~/MoS~2~ composites with different mass ratios was investigated under visible light. The results show that a small amount of MoS~2~ combined with g-C~3~N~4~ can significantly improve photocatalytic activity. The g-C~3~N~4~/MoS~2~ composite with a mass ratio of 1:8 has the highest photocatalytic activity, and the degradation rate of Rh B increases from 50% to 99.6%. The main reason is that MoS~2~ and g-C~3~N~4~ have a matching band structure. The separation rate of photogenerated electron-hole pairs is enhanced. So the g-C~3~N~4~/MoS~2~ composite can improve the photocatalytic activity. The photocatalytic mechanism was proposed through the a

Author

Yu Fan; Yan-ning Yang; Chen Ding

Publisher

Research Square Platform LLC

Published

2021

Language

EN