| 초록 |
Polymeric carbon nitride is a promising candidate for photocatalytic solar fuel production, however, it suffers from insufficient light absorption and sluggish charge carrier transfer. Herein, we synthesized polymeric carbon nitride by ionothermal method with thermal polycondensation of precursors by using the salt melt of lithium chloride and potassium chloride. The as-synthesized polymeric carbon nitride showed a decreasing trend in PL intensity compared to bulk polymeric carbon nitride. And efforts to tune the electronic structure of polymeric carbon nitride by introducing metal ions affected on light absorption property, contributing to greater visible light absorption. As a result, the as-synthesized polymeric carbon nitride exhibited efficient photocatalytic solar fuel production performance with enhanced optical absorbance, charge transfer, and exciton dissociation. Further, the polymeric carbon nitride was processed to make a thin film on FTO glass and the trends remained with remarkable photoelectrochemical performances. In addition, the resulting film was applied to check its photoelectrochemical properties for profound understanding and explanations of the above results. |
