Study on Photocatalytic Material Graphitic Carbon Nitrides(g-C3N4)Based on In-situ Light Irradiation-X-ray Photoelectron Spectroscopy(XPS)
When in-situ light irradiation XPS technology is used for the analysis of non-oxidized photocatalyst g-C3N4,the structure changes in the irradiation process are ignored due to the minor binding energy(BE)displacement.Using a self-built in situ irradiation XPS device,the present work verifies that the relative peak intensity of C 1s and N 1s in the conjugated structure of g-C3N4 changed significantly with 375 nm UV source(the applied light source power was greater than 15 mW)irradiation for 15 min.This is attributed to the change of chemical structure caused by electron transfer induced by light irradiation,which supplies the additional evidence for the photocatalytic mechanism research.Furthermore,with the experimental verification,the surface temperature of g-C3N4 material increases due to energy injection of ultraviolet light,which results in the pollutants desorption to a certain extent from the sample surface.
NETL
NSTL
万方数据
