Abstract Non-noble metal g-C3N4/Ni(OH)2 photocatalyst was successfully synthesized by a wet-chemical method. The morphology, structure and photocatalytic hydrogen evolution of g-C3N4/Ni(OH)2 were researched. The experiments showed that the best photocatalytic hydrogen evolution of g-C3N4/Ni(OH)2 was 21 μmolg-1h−1, which was about 105 folds than that of pure g-C3N4. And that the apparent quantum efficiency (AQE) of g-C3N4/Ni(OH)2 composite (2 wt%) achieved 2.78% under light at λ = 420 nm. The enhanced photocatalytic performance can be attributed to the heterostructure between the rod-shaped Ni(OH)2 and g-C3N4. Meanwhile, partial carbonylation on the surface of g-C3N4 via hydrothermal reaction has made a certain contribution. Their synergistic effect promotes the rapid transfer and separation of electron-hole pairs, and improves the efficiency of photocatalytic hydrogen evolution. The possible mechanism of hydrogen evolution was also proposed.

中文翻译：

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在g-C3N4夹层之间原位生长棒状Ni(OH)2用于可见光下析氢

摘要 采用湿化学法成功合成了非贵金属g-C3N4/Ni(OH)2光催化剂。研究了g-C3N4/Ni(OH)2的形貌、结构和光催化析氢。实验表明，g-C3N4/Ni(OH)2的最佳光催化析氢为21 μmolg-1h-1，约为纯g-C3N4的105倍。并且 g-C3N4/Ni(OH)2 复合材料 (2 wt%) 在 λ = 420 nm 的光下的表观量子效率 (AQE) 达到了 2.78%。增强的光催化性能可归因于棒状 Ni(OH)2 和 g-C3N4 之间的异质结构。同时，g-C3N4表面通过水热反应的部分羰基化也做出了一定的贡献。它们的协同作用促进了电子-空穴对的快速转移和分离，并提高光催化析氢效率。还提出了析氢的可能机制。