Triazolotriazine-based carbon nitride framework for hydrogen peroxide photoproduction

Carbon nitride materials, typically consisting of heptazine or triazine, are perpetually captivating due to their exceptional optoelectronic properties and tunable band structure. Current research predominantly focuses on performance optimization of carbon nitride materials, with structural innovation receiving comparatively limited attention. Here, we design a nitrogen-rich heteroaromatic ring with cyan groups, and construct a carbon nitride framework (CNTTT-CTF) through its cyclotrimerization. CNTTT-CTF displays organic semiconductor characteristics that are similar to g-C₃N₄. However, the smallest repeating unit of CNTTT-CTF consists of tris([1,2,4]triazolo)[1,5-a:1’,5’-c:1”,5”-e][1,3,5]triazine and triazine rings, which distinguishes it from traditional g-C₃N₄. Furthermore, CNTTT-CTF can trigger various photocatalytic reactions such as photosynthetic H₂O₂, CO₂ reduction, and nitro reduction. We find that the H₂O₂ photosynthetic performance is comparable to some modified g-C₃N₄-based catalysts. (Figure presented.)