Mingliang Ma1, Yuying Yang1,2, Yan Chen1, Jiabin Jiang1, Yong Ma3, Zunfa Wang1, Weibo Huang1, Shasha Wang4, Mingqing Liu1, Dongxue Ma1, Xiaoning Yan1. 1. School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China. 2. Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, People's Republic of China. 3. School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China. courage2010@126.com. 4. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China.
Abstract
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 Fe3O4/C/MnO2/C3N4 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 Fe3O4 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-C3N4 layer could fully contact with coupled semiconductor. A Z-type heterojunction between g-C3N4 and flower-like MnO2 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.
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 bepan class="Chemical">come a hotpot. In this work, magnetic Fe3O4/C/MnO2/C3N4composite 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 Fe3O4core 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-C3N4 layer could fully contact with coupled semiconductor. A Z-type heterojunction between g-C3N4 and flower-like MnO2 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.
Authors: Xinchen Wang; Kazuhiko Maeda; Arne Thomas; Kazuhiro Takanabe; Gang Xin; Johan M Carlsson; Kazunari Domen; Markus Antonietti Journal: Nat Mater Date: 2008-11-09 Impact factor: 43.841