“…Recently, attractive conjugated polymer semiconductor graphitic carbon nitride (g-C 3 N 4 ) attracts more and more attention in the field of photocatalysis technology by reason of excellent physicochemical stability, fascinating electronic band structure, and earth-abundant nature. [10,11] In 2009, Wang et al first reported the photocatalytic hydrogen evolution by water splitting employing g-C 3 N 4 as the photocatalyst. [12] However, the photocatalytic activity for hydrogen production of g-C 3 N 4 cannot meet the requirements of practical application, which can be ascribed to the relatively small surface area, fast charge carrier combination, low electrical conductivity, and poor visible absorption ability.…”