Ultrathin sulfur-doped g-C₃N₄ porous nanosheets (SCNNSs) with large lateral size and carbon vacancies were obtained by directly collecting the gaseous product of thiourea under a self-generated NH₃ atmosphere. The NH₃ atmosphere promoted the formation of sulfur doped g-C₃N₄ nanosheets with a hierarchical pore structure and a high specific surface area. Carbon vacancies were also generated in the SCNNSs without notably changing the overall chemical structure. The obtained SCNNSs-550 showed a photocatalytic nitrogen fixation rate of 5.99 mM h⁻¹ gCat⁻¹ under simulated sunlight irradiation within 4 h, which is 2.8 times as high as that of bulk SCN. This superior photocatalytic performance of SCNNSs was attributed to the porous sheet structure with sulfur doping and carbon vacancies, which provide many active sites for surface reactions and increase the charge-carrier separation rate. This novel synthetic method provides a simple and efficient way to dope non-metals and form a defect structure in g-C₃N₄ for excellent photocatalytic performance.

通过在自生NH ₃气氛下直接收集硫脲的气态产物，获得了具有大的横向尺寸和碳空位的超薄掺杂硫的gC ₃ N ₄多孔纳米片（SCNNS）。NH ₃气氛促进了具有分级孔结构和高比表面积的硫掺杂gC ₃ N ₄纳米片的形成。SCNNS中也产生了碳空位，而没有显着改变整体化学结构。所获得的SCNNSs-550显示出5.99 mM h ^-1  gCat ^-1的光催化固氮率。在模拟阳光照射下4小时内，是散装SCN的2.8倍。SCNNSs的这种优异的光催化性能归因于具有硫掺杂和碳空位的多孔片层结构，该结构为表面反应提供了许多活性位点并提高了电荷-载流子的分离速率。这种新颖的合成方法为掺杂非金属并在gC ₃ N _4中形成缺陷结构提供了一种简单而有效的方法，从而具有出色的光催化性能。