Efficient Photocatalytic Material Based Graphitic Carbon Nitride

This thesis mainly studied the in-situ synthesis of MoS2 nanocrystal on g-C3N4and the growth of self-assembled PTCDA molecular crystal on g-C3N4 and the photocatalytic activity of the samples to the benzylamine photooxidation.A series of in situ deposition of MoS2was loaded with different contents of g-C3N4 photocatalytic material,and characterized by several methods.It was found that MoS2 accelerated the separation of hole-electron pairs of g-C3N4,and increased the visible light absorption of samples,which further increased the photocatalytic activity of samples.3MoS2-C3N4 was found to have the best avtivity among the samples.PTCDA was heated with g-C3N4 to synthesize PTCDA-C3N4,and the crystalline of PTCDA changed from ? phase to ? phase due to the strong ?-? interaction between PTCDA and g-C3N4.PTCDA-C3N4 showed higher electron transition rate and visible light absorption and was found to be direct Z-scheme photocatalyst,which had higher electron-hole separation and better oxidizing ability than g-C3N4.As a result,PTCDA-C3N4 exhibited eight times higher conversion than C3N4 did when using benzylamine oxidation reaction as model reaction.