Catalysis Letters, Vol.150, No.9, 2487-2496, 2020
Sulfur Doped Carbon-Rich g-C(3)N(4)for Enhanced Photocatalytic H(2)Evolution: Morphology and Crystallinity Effect
Molecular design for the intercalation of S and C in the framework of g-C(3)N(4)is a promising strategy to increase visible light harvesting and facilitate the separation of photoinduced electron/hole pairs. Herein, we reported a facial method to prepare porous S doped g-C(3)N(4)nanotubes by thermal polymerization of urea and 2-thiobarbituric acid. The obtained catalysts contain certain carbon and sulfur atoms in the aromatic rings substituting the nitrogen atoms in g-C3N4, which narrows down the band gap, and increases the separation of photoinduced charge carriers. Meanwhile, nanotube formation increases the specific surface area of catalyst. The synergistic effect of S doped carbon rich g-C(3)N(4)and nanostructure forming results in superior photocatalytic H(2)evolution from water splitting. The study shows that the photocatalytic H(2)evolution is correlated with the crystallinity of S doped g-C3N4. Graphic Schematic illustration for framework of 0.3S-CN and its photocatalytic hydrogen evolution mechanism.