Direct halogenation, including chlorination, bromination and iodination of terminal alkynes, are of great importance in organic synthesis. Here an efficient and recyclable nano-Ag/g-C₃N₄ catalyst system was developed and proved to be remarkably active with 39 examples varied from chlorination, bromination to iodination, of which 14 runs have yielded more than 95% of the product. Recycling of the catalyst was also achieved without obvious activity loss after several runs: 99% yield was observed even after 5 runs in the bromination of phenylacetylene. The catalysts system is of low cost and easy to be prepared, making this procedure versatile, convenient and economic.

直接卤化，包括末端炔烃的氯化，溴化和碘化，在有机合成中非常重要。在此，开发了一种有效且可循环利用的纳米Ag / gC ₃ N ₄催化剂体系，并证明其具有显着的活性，从氯化，溴化到碘化的39种实例中，有14种的收率超过了95％。在几次运行后，也实现了催化剂的再循环而没有明显的活性损失：即使在苯乙炔的溴化过程中进行了5次运行，也观察到99％的收率。该催化剂系统成本低廉且易于制备，使得该方法通用，方便且经济。