Pyrolysis of the Ta₂O₅/melamine mixture in molten chlorides is herein demonstrated as a facile and controllable method to nitridize and functionalize Ta₂O₅. The influence of the stoichiometry and composition of Ta₂O₅/melamine in molten salts on the nitridation process is rationalized to ensure the controllable preparation of Ta₃N₅ and Ta₃N₅/TaON. The characterization results, including scanning electron microscopy, transmission electron microscopy, elemental mapping, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy, all confirm the existence of the Ta₃N₅/TaON heterojunction, in which the TaON nanoparticles are closely anchored to the Ta₃N₅ nanorods. Benefiting from its composition and structure, the Ta₃N₅/TaON composites show enhanced photocatalytic activity for the degradation of methylene blue. The present study highlights that the molten salt method using a solid nitrogen source can be a new technique for rationalizing the design of nitrides and oxynitrides.

Ta ₂ O ₅ /三聚氰胺混合物在熔融氯化物中的热解在本文中被证明是氮化和功能化Ta ₂ O ₅的简便且可控制的方法。合理设计了熔盐中Ta ₂ O ₅ /三聚氰胺的化学计量和组成对氮化过程的影响，以确保可控地制备Ta ₃ N ₅和Ta ₃ N ₅ / TaON。扫描电子显微镜，透射电子显微镜，元素图谱，X射线光电子能谱和光致发光光谱等表征结果均证实了Ta的存在₃ N ₅ / TaON异质结，其中TaON纳米颗粒紧密锚定到Ta ₃ N ₅纳米棒上。Ta ₃ N ₅ / TaON复合材料得益于其组成和结构，对亚甲基蓝的降解显示出增强的光催化活性。本研究强调，使用固态氮源的熔盐方法可以成为合理设计氮化物和氮氧化物的一种新技术。