Pd modified ZnIn₂S₄/P25 (Pd@ZnIn₂S₄/P25) heterostructures have been synthesized by hydrothermal and photo-reduction method. The H₂ evolution rate of optimal photocatalyst 0.5 %Pd modified 5ZnIn₂S₄/2P25 (0.5 %Pd@5ZnIn₂S₄/2P25) are approximately 9100 and 3693 μmol · g⁻¹h⁻¹ under simulated sunlight and visible light irradiation with ethanol as the sacrificial agent, which are nearly 9 and 460 times higher than pure ZnIn₂S₄ and P25, respectively. The promoted photocatalytic performance can be attributed to the physicochemical properties of the catalysts and the strong electronic interaction between Pd modified ZnIn₂S₄ (Pd@ZnIn₂S₄) and P25, the improved transfer rate of photo-generated electrons and holes, the inhibited recombination of charge carriers, and the enhanced light harvesting. The results of photo-electrochemistry and EPR indicate that it is a Z-scheme photocatalytic system, in which the electrons accumulate on the conduct band of ZnIn₂S₄ and the holes assemble on the valence band of P25. This work provides an effective method to construct highly efficient photocatalytic systems for solar H₂ generation.

Pd修饰的ZnIn ₂ S ₄ /P25（Pd@ZnIn ₂ S ₄ /P25）异质结构已通过水热和光还原法合成。为H ₂最佳光催化剂的生成速率的0.5％Pd改性5ZnIn ₂小号₄ / 2P25（0.5％的Pd @ 5ZnIn ₂小号₄ / 2P25）是大约9100和3693微摩尔·克^-1 ħ ^-1模拟太阳光和可见光照射下以乙醇为牺牲剂，比纯 ZnIn ₂ S ₄高近 9 倍和 460 倍和 P25，分别。光催化性能的提升可归因于催化剂的物理化学性质以及 Pd 修饰的 ZnIn ₂ S ₄ (Pd@ZnIn ₂ S ₄ ) 与 P25之间的强电子相互作用，提高了光生电子和空穴的转移率，抑制了电荷载流子的重组，并增强了光收集。光电化学和EPR结果表明，它是一个Z型光催化体系，其中电子聚集在ZnIn ₂ S ₄的导带上，空穴聚集在P25的价带上。这项工作为构建高效的太阳能光催化体系提供了一种有效的方法。₂代。