Photocatalytic N₂ fixation has been overgrowing since the 20th century because the Haber–Bosch process is more energy-intensive. Therefore other sustainable alternatives are highly needed. A simple procedure for constructing novel ZnO/ZnSnO₃/Carbon Dots hybrid nanocomposites was exhibited through the hydrothermal approach. The surface morphology, crystal structure, and phase of the designed nanomaterials were assayed with various analyses. In this research paper, photocatalytic N₂ fixation induced by ternary ZnO/ZnSnO₃/Carbon Dots system. The results displayed that the ZnO/ZnSnO₃/Carbon Dots (0.5 mL) system has remarkable activity in the N₂ fixation process compared with the sole ZnO and ZnO/ZnSnO₃ (30%), which is 11.5 and 2.1 times, respectively. The durability of the optimum system, as an essential character of the nanocomposite, was assayed in four recycles. Moreover, the effect of solvent, electron scavenger and media pH in the NH₄⁺ generation rate was investigated. At last, a suitable mechanism was offered for the notable N₂ photofixation improvement. This novel information could clarify the construction of impressive systems for nitrogen photofixation.

自20世纪以来，由于Haber-Bosch工艺需要更多的能源，因此光催化N ₂固定作用一直在增长。因此，迫切需要其他可持续的替代方案。通过水热法展示了一种构造新型ZnO / ZnSnO ₃ /碳点杂化纳米复合材料的简单方法。通过各种分析测定了所设计的纳米材料的表面形态，晶体结构和相。本文研究了三元ZnO / ZnSnO ₃ /碳点体系诱导的光催化N ₂固定。结果表明，ZnO / ZnSnO ₃ /碳点（0.5 mL）系统在N _2中具有显着的活性。与单独的ZnO和ZnO / ZnSnO ₃（30％）相比，固定过程分别为11.5和2.1倍。作为四个纳米复合材料，测定了最佳系统的耐久性，作为纳米复合材料的基本特征。此外，研究了溶剂，电子清除剂和介质pH对NH ₄ ⁺生成速率的影响。最后，提供了一种合适的机制来显着改善N _2的光固定性。这一新颖的信息可以阐明令人印象深刻的氮固定系统的建设。