Abstract Nitrogen fixation is a natural or artificial process, in which molecular nitrogen is combined with other elements to form more-reactive compounds containing nitrogen elements. In this study, graphitic carbon nitride nanosheets were combined with nanoparticles of MgO to fabricate an efficient binary visible-light-induced photocatalysts (abbreviated as NCN/MgO), and they were applied for the photofixation of nitrogen gas. The synthesized photocatalysts were characterized to investigate the morphology, phase structure, optical, and textural properties. The results displayed that the NCN/MgO (10%) nanocomposite has considerable performance in the nitrogen photofixation reaction compared with the pristine CN and NCN, which is 10.8 and 2.8 times, respectively. The stability of the optimum sample, as a vital characteristic of photocatalyst, was examined in three runs. Also, the effect of MgO loading, calcination temperature, solvent, electron scavenger, pH, and absence of N2 in solution upon the NH4+ production rate was examined. Finally, an anticipated mechanism was proposed for the meaningful nitrogen photofixation enhancement.

中文翻译：

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MgO纳米颗粒装饰的g-C3N4纳米片的可见光诱导氮光固着能力

摘要 固氮是一种自然或人工过程，其中分子氮与其他元素结合，形成含有氮元素的更具反应性的化合物。在这项研究中，石墨氮化碳纳米片与 MgO 纳米颗粒相结合，制备了一种高效的二元可见光诱导光催化剂（简称 NCN/MgO），并将其应用于氮气的光固定。对合成的光催化剂进行表征，以研究形貌、相结构、光学和结构特性。结果表明，NCN/MgO（10%）纳米复合材料在氮光固反应中具有相当的性能，分别是原始CN和NCN的10.8倍和2.8倍。最佳样品的稳定性，作为光催化剂的一个重要特性，分三轮检查。此外，还检查了 MgO 负载量、煅烧温度、溶剂、电子清除剂、pH 和溶液中不存在 N2 对 NH4+ 生产速率的影响。最后，提出了一种有意义的氮光固定增强的预期机制。