Preparation of g-C3N4/TiO2 Composite and Visible Light Catalytic Degradation of Nitrobenzene
g-C3N4 was deposited on TiO2 nanotubes by in-situ synthesis to modify the material.A series of g-C3N4/TiO2 composites with different loading amounts(0.2,0.3,0.4,0.5,0.6 g·L-1 g-C3N4/TiO2 NTs)were prepared by changing the mass concentration of urea.Then,the photocatalytic degradation performance of g-C3N4/TiO2 composite materials for nitrobenzene was investigated under visible light conditions,and related characterization analysis and free radical scavenging experiments were conducted on the materials.The final test results showed that the photocatalytic activity could be significantly improved by loading g-C3N4 onto titanium dioxide nanotubes.It may be due to the formation of heterojunction between g-C3N4 and titanium dioxide,which prolongs the life of the carrier and hinders the recombination of electrons and holes,improving the photocatalytic activity of the composite.
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