期刊
MATERIALS RESEARCH BULLETIN
卷 107, 期 -, 页码 94-99出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.07.013
关键词
Oxides; Semiconductors; Microstructure; Optical properties; Catalytic properties
资金
- National Key Research and Development Program of China [2016YFB0701100]
- National Natural Science Foundation of China [51525101, 51601032, 51502285, 51402047]
Porous alpha-Fe2O3 nanoflowers were successfully prepared by calcining Fe3S4 precursor. The crystal structures, pore sizes and surface areas of the samples could be tuned through changing heat-treating temperatures. The samples calcined at 600 degrees C exhibited the highest photocatalytic activity for the degradation of methyl orange (MO) under visible light irradiation, which showed a degradation efficiency of more than 99% within 40 min. The enhanced photocatalytic activity could be attributed to its porous hierarchical structure which could promote light absorption efficiency, largely decrease the distance of charge carriers moving to solution and enlarge its specific surface area. This simple and scalable strategy can also be extended to other porous metal oxide nanostructures for photocatalytic applications.
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