Ma Mingliang, Yang Yuying, Chen Yan, Jiang Jiabin, Ma Yong, Wang Zunfa, Huang Weibo, Wang Shasha, Liu Mingqing, Ma Dongxue, Yan Xiaoning
School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China.
Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, People's Republic of China.
Sci Rep. 2021 Jan 28;11(1):2597. doi: 10.1038/s41598-021-81974-2.
The serious problems of environmental pollution and energy shortage have pushed the green economy photocatalysis technology to the forefront of research. Therefore, the development of an efficient and environmentally friendly photocatalyst has become a hotpot. In this work, magnetic FeO/C/MnO/CN composite as photocatalyst was synthesized by combining in situ coating with low-temperature reassembling of CN precursors. Morphology and structure characterization showed that the composite photocatalyst has a hollow core-shell flower-like structure. In the composite, the magnetic FeO core was convenient for magnetic separation and recovery. The introduction of conductive C layer could avoid recombining photo-generated electrons and holes effectively. Ultra-thin g-CN layer could fully contact with coupled semiconductor. A Z-type heterojunction between g-CN and flower-like MnO was constructed to improve photocatalytic performance. Under the simulated visible light, 15 wt% photocatalyst exhibited 94.11% degradation efficiency in 140 min for degrading methyl orange and good recyclability in the cycle experiment.
环境污染和能源短缺等严峻问题已将绿色经济光催化技术推至研究前沿。因此，开发高效且环保的光催化剂已成为热点。在本工作中，通过原位包覆与CN前驱体的低温重组相结合的方法合成了磁性FeO/C/MnO/CN复合光催化剂。形貌和结构表征表明，该复合光催化剂具有中空核壳花状结构。在该复合材料中，磁性FeO核便于磁分离和回收。导电C层的引入可有效避免光生电子和空穴的复合。超薄g-CN层可与耦合半导体充分接触。构建了g-CN与花状MnO之间的Z型异质结以提高光催化性能。在模拟可见光下，15 wt%的光催化剂在140分钟内对甲基橙的降解效率达94.11%，且在循环实验中具有良好的可回收性。
