A facile and highly efficient mesoporous Ag₃VO₄/C₃N₄ heterojunction photocatalysts were synthesized by accommodating Ag₃VO₄ nanoparticles (NPs) onto the porous g-C₃N₄ nanosheets. The findings showed that mesoporous Ag₃VO₄ NPs uniformly disseminated onto the g-C₃N₄ with a small particle size (5 nm). Compared to pristine g-C₃N₄ and Ag₃VO₄ NPs, the mesoporous Ag₃VO₄/C₃N₄ photocatalysts displayed much higher photocatalytic Hg(II) reduction. It was found that among all the synthesized nanocomposites, the synthetic mesoporous 2.4%Ag₃VO₄/C₃N₄ photocatalyst indicated much better photoreduction performance. The Hg(II) reduction was completely achieved within 60 min (100%) through illumination by visible light, which was 4.3 and 5.4 fold larger photocatalytic performance than that Ag₃VO₄ NPs and g-C₃N₄, in that order. The enhancement Hg(II) reduction performance of mesoporous Ag₃VO₄/C₃N₄ photocatalysts could be explained by a synergetic effect of S-scheme heterojunction structure with high surface area and promotion light harvest, suggesting to efficacious of the photoinduced charges separation. The recycling performance of the nanocomposites exhibited superior stability, durability and reusability. S-scheme charge transfer route accomplished of mesoporous Ag₃VO₄/C₃N₄ with improved stronger redox ability and separation of photoinduced carriers. This research work clarifies an outstanding approach to promote a novel and facile S-scheme photocatalytic system to oxidize environmental contaminants and reduce toxic heavy metals.

通过将Ag ₃ VO ₄纳米颗粒（NPs）容纳在多孔gC ₃ N ₄纳米片上，合成了一种便捷高效的中孔Ag ₃ VO ₄ / C ₃ N ₄异质结光催化剂。结果表明，介孔的Ag ₃ VO ₄ NPs以较小的粒径（5 nm）均匀地分散在gC ₃ N ₄上。与原始gC ₃ N ₄和Ag ₃ VO ₄ NPs相比，中孔Ag ₃ VO ₄ / C₃ N ₄光催化剂显示出更高的光催化Hg（II）还原率。发现在所有合成的纳米复合材料中，合成的介孔2.4％Ag ₃ VO ₄ / C ₃ N ₄光催化剂显示出更好的光还原性能。通过可见光照射，可以在60分钟内（100％）完全实现Hg（II）的还原，其光催化性能依次比Ag ₃ VO ₄ NPs和gC ₃ N _4分别大4.3和5.4倍。中孔Ag ₃ VO ₄ / C ₃ N的增强Hg（II）还原性能_4种光催化剂可以通过高表面积S型异质结结构的协同作用和促进光的收集来解释，这表明光诱导电荷的分离是有效的。纳米复合材料的再循环性能表现出优异的稳定性，耐久性和可重复使用性。由介孔Ag ₃ VO ₄ / C ₃ N ₄完成的S方案电荷转移路径，具有增强的更强的氧化还原能力和光诱导载流子的分离。这项研究工作阐明了一种出色的方法，可以促进一种新颖且简便的S方案光催化系统氧化环境污染物并减少有毒的重金属。