Graphitic carbon nitride (g-C₃N₄) gets lots of attention as a promising candidate in solar energy conversion. However, the single modification method has limited effectiveness to access highly photocatalytic performance g-C₃N₄ catalyst. In this work, we present a facile method that can construct nitrogen and sulfur defects in the synthesis process of sulfur-doped g-C₃N₄. As results, nitrogen and sulfur deficient sulfur-doped g-C₃N₄ catalyst (SCND-x) integrate the advantages of these two modification methods. SCND-x exhibit a wide light absorption range and an efficient photocarriers separation ability. The optimal sample SCND-3 shows an excellent photocatalytic property with a hydrogen evolution rate of 70.2 μmol h⁻¹ under visible light excitation (λ > 420 nm), which is about 23.4 times better than pristine g-C₃N₄ (MCN). And the apparent quantum efficiency of SCND-3 is up to 3.3% at 420 nm. In a word, we successfully practice a facile method to prepare high photocatalytic activity catalyst by introducing nitrogen and sulfur defects in sulfur-doped g-C₃N₄.

石墨化的氮化碳（gC ₃ N ₄）作为太阳能转化中的有希望的候选者而受到了广泛的关注。但是，单一改性方法在获得高光催化性能的gC ₃ N ₄催化剂方面效果有限。在这项工作中，我们提出了一种可以在掺杂硫的gC ₃ N ₄的合成过程中构造氮和硫缺陷的简便方法。结果，氮和硫不足的硫掺杂gC ₃ N ₄催化剂（SCND-x）整合了这两种改性方法的优点。SCND-x表现出较宽的光吸收范围和有效的光载流子分离能力。最佳样品SCND-3在可见光激发下（λ> 420 nm）表现出优异的光催化性能，氢释放速率为70.2μmolh ^-1，是原始gC ₃ N ₄（MCN）的23.4倍。SCND-3的表观量子效率在420 nm时高达3.3％。简而言之，我们通过在掺硫的gC ₃ N _4中引入氮和硫缺陷，成功地实践了一种制备高光催化活性催化剂的简便方法。