光催化
二亚胺
钨酸盐
苝
光化学
石墨氮化碳
光降解
降级(电信)
超分子
化学
材料科学
化学工程
无机化学
有机化学
分子
催化作用
工程类
电信
计算机科学
作者
Wenwu Zhou,Bing Yang,Guo Liu,Chenmin Xu,Qiuyi Ji,Weiming Xiang,Dunyu Sun,Qiang Zhong,Huan He,Yazi Liu,Zhe Xu,Chengdu Qi,Shiyin Li,Shaogui Yang
标识
DOI:10.1016/j.jcis.2022.02.003
摘要
Employing perylene diimide supermolecule (PDI) as metal-free cocatalyst, a novel PDI/g-C3N4/Bi2WO6 (PCB) photocatalyst was constructed for the effective degradation of antibiotics. Both the photocatalytic activity and photostability of g-C3N4/Bi2WO6 (gCB) were further improved after loading PDI. Under simulated sunlight illumination, the apparent rate constant of tetracycline (TC) degradation by PCB reached 2.6 times that of gCB. The photocatalytic activity of PCB still kept over 80% after 4 cycle experiments, while gCB only remained around 21%. The superior activity of PCB was ascribed to the synergism between the extended visible light absorption range through the participation of PDI cocatalyst and facilitated gCB-to-PDI photoelectron transfer. TC would finally be transformed into non-toxic ring opening products and mineralized. This work demonstrated that PDI was an excellent metal-free cocatalyst and exhibited great potential to boost the activity of photocatalysts.
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