Nanocomposite photocatalysts can potentially produce clean hydrogen (H₂) and degrade organic pollutants such as tetracycline (TC). We present hydrothermally synthesized ternary composites of ZnIn₂S₄–CeO₂ implanted into reduced graphene oxide (rGO) layers that outperform typical, expensive catalysts used in the hydrogen evolution reaction (HER). The structural morphology of the composite along with its H₂ photocatalytic production and TC degradation ability are evaluated. The results reveal that the ZnIn₂S₄/rGO/CeO₂ heterojunctions demonstrate higher photocatalytic activity for H₂ generation and TC degradation than their bare and binary counterparts. The higher efficiency of the ZnIn₂S₄–rGO–CeO₂ composite is attributable to the synergetic effect of rGO as an electron (e^–)-transfer bridge, as evidenced by the photocurrent density and photoluminescence results. The ZnIn₂S₄/rGO/CeO₂ ternary catalyst absorbs a wide range of wavelengths, diffuses and separates the photoinduced charge carriers quickly and efficiently, and slowly recombines e^– and h⁺. The generated ternary composite material is then used to demonstrate plausible photocatalytic HER and degradation processes.

纳米复合光催化剂可以潜在地产生清洁氢气 (H ₂ ) 并降解有机污染物，例如四环素 (TC)。我们展示了注入还原氧化石墨烯 (rGO) 层的 ZnIn ₂ S ₄ –CeO ₂的水热合成三元复合材料，其性能优于析氢反应 (HER) 中使用的典型、昂贵的催化剂。评估了复合材料的结构形态及其H ₂光催化产生和TC降解能力。结果表明，ZnIn ₂ S ₄ /rGO/CeO _{2异质结对H 2}表现出更高的光催化活性。生成和 TC 退化比它们的裸和二进制对应物。_{ZnIn 2} S ₄ -rGO-CeO ₂复合材料的更高效率归因于 rGO 作为电子 (e ^- )-转移桥的协同效应，光电流密度和光致发光结果证明了这一点。ZnIn ₂ S ₄ /rGO/CeO ₂三元催化剂吸收宽波长范围，快速有效地扩散和分离光生电荷载流子，并缓慢复合e ^-和h ⁺。然后使用生成的三元复合材料来展示合理的光催化 HER 和降解过程。