“…[17][18][19] However, the photocatalytic activity of g-C 3 N 4 was limited by the small specic surface area, high combination rate of photogenerated electron-hole pairs and low utilization efficiency of the visible light. 18,20,21 Consequently, some strategies such as element doping, 22,23 constructing heterojunction [24][25][26] and morphology control 27,28 have been adopted to enhance the photocatalytic performance of g-C 3 N 4 . Among them, increasing the specic surface area was regarded as the more simply and practical way to modify the g-C 3 N 4 .…”