光催化
异质结
光降解
材料科学
X射线光电子能谱
降级(电信)
催化作用
吸附
金属有机骨架
化学工程
傅里叶变换红外光谱
光化学
核化学
化学
物理化学
有机化学
工程类
电信
光电子学
计算机科学
作者
Yaping Pan,Xin Hu,Dongcai Shen,Zhe Li,Rong Chen,Yiming Li,Junpeng Lu,Mutai Bao
标识
DOI:10.1016/j.seppur.2022.121216
摘要
A novel [email protected]/M−CN photocatalyst is synthesized via one-pot EG (ethylene glyco)-assisted solvothermal heating. The morphology, microstructure, and composition of the prepared catalysts are characterized by SEM, XRD, FTIR, and XPS. The [email protected]/M−CN photocatalyst exhibites better pollutant adsorption and degradation than pure BiOBr. After grafting iron-based metal–organic framework (Fe-MOF) and modified g-C3N4 (M−CN) species, photogenerated electrons can be transferred from BiOBr to M−CN and Fe-MOF species via interfacial charge transfer. Therefore, the separation efficiency of electrons (e−) and holes (h+) is enhanced. [email protected]/M−CN−50 can degrade approximately 93% of ciprofloxacin in 120 min under visible light illumination, which is 7.9 and 1.2 times that of pure g-C3N4 (11.8%) and BiOBr (77.4%), respectively. Furthermore, radical capturing experiments and ESR analysis reveal that h+ and ·O2− are the main reactive species in the system. A combination of DFT calculations and radical trapping experiments show that M−CN and BiOBr form a Z-type heterojunction. In addition, Fe-MOF plays a vital role as a carrier acceptor for electron transport. Finally, the degradation pathway of ciprofloxacin is revealed by gas-chromatography–mass-spectroscopy analysis. This study provides new insights into the photocatalytic degradation of pollutants in water.
科研通智能强力驱动
Strongly Powered by AbleSci AI