To realize the high-efficiency plasmonic hot-electron injection in photocatalytic pollutant elimination, Ag/g-C₃N₄ heterostructure photocatalyst was synthesized through a novel in situ photochemical solid-phase reduction approach. Transmission electron microscope images of the obtained samples showed that Ag atom was uniformly dispersed on the surface of g-C₃N₄ sheet, thus can fully utilize the local surface plasmon resonance of metallic Ag and then improve the photocatalytic performance of Ag/g-C₃N₄. It is reported that Ag/g-C₃N₄ heterojunction presented significantly enhanced sunlight absorption and inhibited the recombination of photoinduced carriers, and further reinforced the photocatalytic performance of g-C₃N₄ substrate. The 3 wt%-Ag/g-C₃N₄ exhibited the best catalytic activity toward rhodamine B (RhB) and phenol degradation under visible light irradiation, with apparent rate constants of 0.016 and 0.018 min⁻¹, which was 8 and 10 times that of pure g-C₃N₄, respectively. This work supplied an advanced approach for constructing efficient solar light-driven photocatalysts, which would be making a certain contribution to the control of water pollution.

中文翻译：

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单原子 Ag/g-C3N4 的光化学固相原位锚定以增强光催化活性

为了实现光催化污染物消除中的高效等离子体热电子注入，通过一种新型的原位光化学固相还原方法合成了Ag/gC ₃ N ₄异质结构光催化剂。所得样品的透射电子显微镜图像表明，Ag原子均匀地分散在gC ₃ N ₄片材表面，因此可以充分利用金属Ag的局域表面等离子体共振，进而提高Ag/gC ₃ N ₄的光催化性能. 据报道，Ag/gC ₃ N ₄异质结显着增强了阳光吸收并抑制了光致载流子的复合，进一步增强了gC ₃ N ₄底物的光催化性能。3 wt%-Ag/gC ₃ N ₄在可见光照射下对罗丹明 B (RhB) 和苯酚的降解表现出最好的催化活性，表观速率常数分别为 0.016 和 0.018 min ^-1，分别是罗丹明 B (RhB) 和苯酚的8 倍和 10 倍分别为纯 gC ₃ N ₄。这项工作为构建高效的太阳能光驱动光催化剂提供了一种先进的方法，将为水污染的控制做出一定的贡献。