“…For instance, SiO 2 /g-C 3 N 4 [17], Ag-AgBr/g-C 3 N 4 [18], g-C 3 N 4 /BiOCl [19,20], g-C 3 N 4 /ZnO [21], A g-C 3 N 4 -CdS [22], g-C 3 N 4 -TiO 2 [23][24][25], g-C 3 N 4 /Bi 2 WO 6 [26], g-C 3 N 4 -Co 3 O 4 [27], g-C 3 N 4 -Ag 3 PO 4 [28], N TiO 2 /g C 3 N 4 [29], Al 2 O 3 /g-C 3 N 4 [30], et al All these researches of g-C 3 N 4 sensitive or modified or composited or heterojunction could give the positive results in photocatalysis, it was also identified that the g-C 3 N 4 as the organic photocatalytic material could effectively enhance the photocatalytic activity of photocatalysts. However, among the compounded types, maybe due to the better properties of TiO 2 , the g-C 3 N 4 -TiO 2 was widely investigated.…”