A zinc phthalocyanine derivative (ZnPc) with one carboxyl group and three 15-crown-5 ether moieties has been synthesized and used as photosensitizer of Pt-loaded graphitic carbon nitride (Pt/g-C₃N₄) for visible-light-driven H₂ production. By adding alkali metal ions (Li⁺, Na⁺, or K⁺) in the ZnPc solution before the dye-sensitization process, the photosensitization for H₂ production on Pt/g-C₃N₄ can be improved with an increasing sequence of Li⁺ < Na⁺ < K⁺. Especially, the co-existing K⁺ ions cause the H₂ production activity enhancing from 163 to 476 μmol h⁻¹ with a turnover number (TON) from 3105 to 9067 h⁻¹. Besides, the coexisting Li⁺, Na⁺ and K⁺ ions exhibiting an impressive apparent quantum yield (AQY) of 2.06%, 2.41% and 2.74% at 700 nm, respectively. All those AQY values are higher than that (1.88%) of the ZnPc-Pt/g-C₃N₄ without addition of alkali metal ion. The further investigation results indicate that the combination of ZnPc's 15-crown-5 ethers with ions are able to enhance the electron transfer ability and then the photoactivity for H₂ production. Our finding may open a way to highly efficient dye-sensitized semiconductor-based photocatalysis for solar energy conversion by using ZnPc derivative bearing purposeful substituents which can be interacted with proper ions.

合成了具有一个羧基和三个15冠-5醚部分的酞菁锌衍生物（ZnPc），并将其用作载有Pt的石墨氮化碳（Pt / gC ₃ N ₄）的光敏剂，用于可见光驱动的H ₂生产。通过在染料敏化过程之前在ZnPc溶液中添加碱金属离子（Li ⁺，Na ⁺或K ⁺），可以通过增加Li ^+的顺序来提高Pt / gC ₃ N ₄上H ₂生成的光敏性。 <Na ⁺  <K ⁺。特别是，共存的K ⁺离子会导致H_2的生产活性从163μmolh ^-1增加到476μmolh ^-1，周转数（TON）从3105增加到9067 h ^-1。此外，共存的Li ⁺，Na ⁺和K ⁺离子在700 nm处的表观量子产率（AQY）分别为2.06％，2.41％和2.74％。在不添加碱金属离子的情况下，所有这些AQY值均高于ZnPc-Pt / gC ₃ N _4的（1.88％）。进一步的研究结果表明，ZnPc的15冠5醚与离子的结合能够增强电子转移能力，进而增强H ₂的光活性。生产。我们的发现可能会通过使用带有目的性取代基的ZnPc衍生物为高效的染料敏化基于半导体的光催化方法进行太阳能转化开辟道路，该取代基可以与适当的离子相互作用。