The utilization of ZnO(1,4-benzenedicarboxylate) metal-organic framework (MOF-5) as a photocatalyst remains a substantial challenge owing to the limited stability under humid conditions and the low photocatalysis efficiency. Herein, a series of Sn-doped MOF-5 (Sn-MOF-5) were designed and fabricated for the photocatalytic N fixation using the specific T-tube photocatalysis reactor. Detailed characterization results illustrates that an appropriate amount of Sn doping can not only enhance the specific surface area and reducing capacity of MOF-5, but also decrease the bandgap width and promote the separation of photogenerated carriers. Therefore, at a Zn:Sn ratio of 6, Sn-MOF-5 with the highest Sn ratio shows superior catalytic performance with the ammonia (NH) yield achieved 3912.76 mol L g after 5 h, and the chemical stability is almost no decay after 15 h of continuous photocatalysis. This may offer a new strategy for improving catalytic performance and stability of MOF through doping Sn.

中文翻译：

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轻松合成 Sn 掺杂 MOF-5 催化剂，实现高效光催化固氮

由于潮湿条件下的稳定性有限和光催化效率低，ZnO（1,4-苯二甲酸）金属有机骨架（MOF-5）作为光催化剂的利用仍然是一个重大挑战。在此，设计并制造了一系列 Sn 掺杂 MOF-5 (Sn-MOF-5)，用于使用特定的 T 管光催化反应器进行光催化固氮。详细的表征结果表明，适量的Sn掺杂不仅可以提高MOF-5的比表面积和还原能力，而且可以减小带隙宽度，促进光生载流子的分离。因此，当Zn:Sn比为6时，Sn比最高的Sn-MOF-5表现出优异的催化性能，5 h后氨(NH)收率达到3912.76 mol·L·g，并且化学稳定性几乎没有衰减。 15小时的连续光催化。这可能为通过掺杂Sn来提高MOF的催化性能和稳定性提供新策略。