In situ synthesis of metal‐free N‐GQD@g‐C3N4 photocatalyst for enhancing photocatalytic activity

Abstract

Abstract Graphitic carbon nitride modified with N‐doped graphene quantum dot (N‐GQDs/g‐C3N4) was prepared by an in situ method, in which the g‐C3N4 was synthesized in the presence of N‐GQD. Furthermore, the structure and photocatalytic degradation performance of in situ synthesised N‐GQDs/g‐C3N4 were investigated and compared with N‐GQDs/g‐C3N4 prepared by traditional mixing method. The removal efficiency was about 98.0% for the photocatalytic degradation of RhB after 70 min, which was larger comparing with other GQDs/g‐C3N4 reported in previous works. The result was attributed to uniform distribution of N‐GQDs on surface of g‐C3N4, leading to more photogenerated electrons transfer. This work did not only report a new synthesis method of N‐GQDs/g‐C3N4, but also provided a new method to improve photodegradation performance of photocatalyst based on g‐C3N4.