Designing efficient photocatalytic systems for hydrogen evolution is extremely important from the viewpoint of the energy crisis. Highly crystalline heterostructure catalysts have been established, considering their interface electric field effect and structural features, which can help improve their photocatalytic hydrogen-production activity. In this study, we fabricated a highly crystalline heterojunction consisting of ZnFe₂O₄ nanobricks anchored onto 2D molybdenum disulfide (MoS₂) nanosheets (i.e., ZnFe₂O₄/MoS₂) via a hydrothermal approach. The optimized ZnFe₂O₄/MoS₂ photocatalyst, with a ZnFe₂O₄ content of 7.5 wt%, exhibited a high hydrogen-production rate of 142.1 μmol h⁻¹ g⁻¹, which was 10.3 times greater than that for the pristine ZnFe₂O₄ under identical conditions. The photoelectrochemical results revealed that the ZnFe₂O₄/MoS₂ heterojunction considerably diminished the recombination of electrons and holes and promoted efficient charge transfer. Subsequently, the plausible Z-scheme mechanism for photocatalytic hydrogen production under white-LED light irradiation was discussed. Additionally, the influence of cocatalysts on the photocatalytic hydrogen evolution for the ZnFe₂O₄/MoS₂ heterostructure was investigated. This work has demonstrated a simplified coupling of one-dimensional or zero-dimensional structures with 2D nanosheets for improving the photocatalytic hydrogen production activity as well as confirmed that MoS₂ is a viable substitute for precious metal-free photocatalysis.

从能源危机的角度来看，设计有效的光催化系统以制氢是非常重要的。考虑到它们的界面电场效应和结构特征，已经建立了高度结晶的异质结构催化剂，这可以帮助提高它们的光催化产氢活性。在这项研究中，我们通过水热方法制备了由ZnFe ₂ O ₄纳米砖固定在二维二硫化钼（MoS ₂）纳米片（即ZnFe ₂ O ₄ / MoS ₂）上的高结晶异质结。优化的ZnFe ₂ O ₄ / MoS ₂光催化剂₂ O ₄含量为7.5 wt％，具有142.1μmolh ^-1  g ^-1的高产氢率，是相同条件下原始ZnFe ₂ O ₄的产氢率的10.3倍。光电化学结果表明，ZnFe ₂ O ₄ / MoS ₂异质结大大减少了电子和空穴的重组，并促进了有效的电荷转移。随后，讨论了在白光LED光照射下光催化制氢的可能的Z方案机理。此外，助催化剂对ZnFe ₂ O的光催化氢释放的影响_研究了4 / MoS ₂异质结构。这项工作已证明一维或零维结构与2D纳米片的简化耦合，可提高光催化制氢的活性，并证实MoS ₂是无贵金属光催化的可行替代品。