Cobalt-doped graphitic carbon nitride photocatalysts with high activity for hydrogen evolution
2016; Elsevier BV; Volume: 392; Linguagem: Inglês
10.1016/j.apsusc.2016.09.086
ISSN1873-5584
AutoresPeiwen Chen, Kui Li, Yu‐Xiang Yu, Wei‐De Zhang,
Tópico(s)Copper-based nanomaterials and applications
ResumoCobalt-doped graphitic carbon nitride (CoCN) was synthesized by one-step thermal polycondensation using cobalt phthalocyanine (CoPc) and melamine as precursors. The π-π interaction between melamine and CoPc promotes cobalt doping into the framework of g-C3N4. The prepared samples were carefully characterized and the results demonstrated that Co-doped graphitic carbon nitride inhibited the crystal growth of graphitic carbon nitride (CN), leading to larger specific surface area (33.1 m2 g−1) and abundant Co-Nx active sites, narrower band gap energy and more efficient separation of photogenerated electrons and holes. 0.46% CoCN exhibited higher hydrogen evolution rate (28.0 μmol h−1) under visible light irradiation, which is about 3.0 times of that over the pure CN and about 2.2 times of that over cobalt-doped CN using CoCl2 ∙ 6H2O as a cobalt source. This study provides a valuable strategy to modify CN with enhanced photocatalytic performance.
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