A heterogenous ternary Ni and Ag co-modified g-C₃N₄ nanocomposite is designed and fabricated using a photoreduction approach for photo-catalytic hydrogen production from methanol-water mixture. Ternary nanocomposite consisting of Ni–Ag co-deposited onto g-C₃N₄ was successfully fabricated and uniformly distributed, therefore, exhibited strong visible-light absorption and efficient charge carrier separation due to synergistic effect throughout the ternary composite. The nanocomposite with varying amounts of nickel and silver, play an important role to maximize the photoactivity with the optimized 3Ni–1Ag/CN sample delivering H₂ of 2137.5 μmolg⁻¹h⁻¹, which is 16.13, 1.42 and 1.52 folds greater than using CN, 3Ni/CN and 3Ag/CN, respectively. This proves that semiconductor composition ratio is important in achieving a successful p-n junction and efficient charge separation and transfer in the ternary composite. The performance of optimized Ni–Ag/CN was further enhanced using photo-reduction method. The highest H₂ yield of 5740 μmolg⁻¹ is achieved over the photo-reduced Ni–Ag/CN-R nanocomposite which is 1.25 folds higher than non-photo-reduced composite. This improvement can be accredited to the formation of good p-n junction between the semiconductors in the ternary composite and due to the formation of photo-reduced Ag which acts as electron sinks which leads to improved charge separation. Furthermore, increasing catalyst loading increases the H₂ production rate and methanol-water mixture gave the highest H₂ production rate. The findings of this study would be beneficial for future hydrogen generation and implementation within newer sustainable systems.

使用光还原方法从甲醇-水混合物中光催化制氢，设计并制造了异质三元 Ni 和 Ag 共改性 gC ₃ N ₄纳米复合材料。由共沉积在 gC ₃ N ₄上的 Ni-Ag 组成的三元纳米复合材料被成功制备并均匀分布，因此，由于整个三元复合材料的协同效应，表现出强烈的可见光吸收和有效的电荷载流子分离。具有不同量的镍和银的纳米复合材料通过优化的 3Ni-1Ag/CN 样品提供2137.5 μmolg ^-1 h ^{-1 的}H ₂发挥着最大化光活性的重要作用，分别比使用 CN、3Ni/CN 和 3Ag/CN 大 16.13、1.42 和 1.52 倍。这证明半导体组成比对于在三元复合物中实现成功的 pn 结和有效的电荷分离和转移很重要。使用光还原方法进一步增强了优化的 Ni-Ag/CN 的性能。最高H ₂产率5740 μmolg ^-1在光还原的 Ni-Ag/CN-R 纳米复合材料上实现了比非光还原的复合材料高 1.25 倍。这种改进可以归因于在三元复合材料中的半导体之间形成了良好的 pn 结，并且由于形成了光还原银，其充当电子汇，从而改善了电荷分离。此外，增加催化剂负载量会增加 H ₂生产速率，甲醇-水混合物产生最高的 H ₂生产速率。这项研究的结果将有利于未来在更新的可持续系统中产生和实施氢气。