A series of noble-metal-free NiS₂-loaded g-C₃N₄ hybrid composites were prepared via simple hydrothermal method. Benefited from the wider spectral response range and the effective separation of photoelectron-holes of g-C₃N₄-NiS₂ heterojunction catalysts, as well as the rich unsaturated active S atoms on the NiS₂ with S₂²⁻, the composite catalysts has prominent photocatalytic performance for H₂ evolution. Remarkably, the optimal composite photocatalysts achieved an average hydrogen production rate as high as 715.83 μmol/h/g in 3 h under visible-light irradiation, which is 2.75 times as high as that of precious metal Pt (259.5 μmol/h/g) as a co-catalyst. Besides, the composite catalyst still shows prominent photocatalytic performance for H₂ evolution after three continuous photocatalytic reaction cycles for 9 h. This study provided a facile method to build a low-cost but effective metal sulfide co-catalyst for hydrogen production under visible light irradiation.

通过简单的水热法制备了一系列无金属的NiS ₂负载gC ₃ N ₄杂化复合材料。得益于gC ₃ N ₄ -NiS ₂异质结催化剂的更宽的光谱响应范围和有效的光电子空穴分离，以及NiS _2上具有S ₂ ^2-的丰富的不饱和活性S原子，该复合催化剂具有突出的应用前景。 H _2的光催化性能进化。值得注意的是，最佳复合光催化剂在可见光照射下，在3小时内的平均产氢率高达715.83μmol/ h / g，是贵金属Pt（259.5μmol/ h / g）的2.75倍。作为助催化剂。此外，经过三个连续的光催化反应循环9 h ，复合催化剂仍具有显着的H ₂放出光催化性能。这项研究提供了一种简便的方法来构建低成本但有效的金属硫化物助催化剂，以在可见光照射下生产氢气。