Cooperative Enhancement Solar Hydrogen Generation of Reformed g-C3N4/TiO2 Mesocrystals Composites

Using template-free process of KOH modified g-C 3 N 4 and solvothermal methods, TC- x composites are synthesized successfully. The morphological characteristics, crystal and chemical composite of the reformed TC- x composites are studied by a series of characterization instruments and methods. Furthermore, TC- x composites is investigated as photocatalytic water splitting hydrogen catalyst. Under simulated sunlight illumination, the amount of reformed g-C 3 N 4 added obvious effects on photocatalytic properties of TC- x composites. The results of hydrogen (H 2 ) production show that reformed with 100 mg g-C 3 N 4 are 1.5 times higher efficiency than that of TiO 2 Mesocrystals. Its outstanding catalytic properties are attributed to the effective electron–hole separation which robust charge transfer and reduction capability. The mechanism of increasing hydrogen evolution activity and possible reasons for improving photocatalytic efficiency is also explained. This finding about g-C 3 N 4 /TiO 2 composites provides a new idea for synthesis and application of a new type of photocatalytic material for energy and environment.