光催化
表面等离子共振
罗丹明B
异质结
光化学
材料科学
可见光谱
电子顺磁共振
辐照
降级(电信)
化学
催化作用
纳米技术
光电子学
纳米颗粒
有机化学
核磁共振
核物理学
物理
电信
计算机科学
作者
Xinfei Zhang,Yuan Zhang,Ziwei Wang,Nan Zhang,Xiaoxu Jia
标识
DOI:10.1016/j.diamond.2022.109398
摘要
It is critical to design efficiently stable photocatalysts for removing organic waste from water. Herein, a sequence of Ag2O/Phosphors-doped g-C3N4 (AgO/PCN) composites with p-n heterojunctions were successfully prepared via facile chemical deposition for photocatalytic degradation of Rhodamine 6G (Rh 6G) and Levofloxacin (LVFX). The resultant composites with an optimal AgO/PCN ratio of 2:1 could degrade approximately 99 % of Rh 6G and 83 % of LVFX in 50 and 120 min, respectively, under visible light irradiation, which is obviously more than pure Ag2O and Phosphors-doped g-C3N4. The increased performance of photocatalysis could be because of the broadened light absorption range originated from Ag0 surface plasmon resonance effect (SPR) and the accelerated separation efficiency of electron-hole pair via p-n junction. Radical trapping and Electron Paramagnetic Resonance experiments confirmed that O2− and h+ were the chief active species, and OH was the minor active species for Rh 6G degradation process. Therefore, a plausible mechanism theorized on the basis that the synergistic effect of surface plasmon resonance and p-n heterojunction for increased photocatalytic activity is proposed. This work advances a novel idea for establishing highly efficient catalysts via synergizing surface plasmon resonance and p-n heterojunction, paving the way for efficient photocatalytic removal of organic pollutants in water.
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