期刊
CHEMNANOMAT
卷 2, 期 11, 页码 1047-1054出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.201600251
关键词
dye degradation; iron oxyhydroxides; methylene blue; photocatalysis; polymorphs; wastewater treatment
资金
- Department of Materials Science and Engineering (MSE) at the University of Toronto
- Ministry of Research Innovation (MRI)
- Ministry of Economic Development, Employment and Infrastructure (MEDI)
- Ministry of the Environment and Climate Change (MOECC)
- Connaught Innovation Fund
- Connaught Global Challenge Fund
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University Research Board at the American University of Beirut (AUB) [102848]
- Masri institute at the American University of Beirut (AUB) [102882]
Four different polymorphs of nanostructured iron oxyhydroxides, namely; goethite (-FeOOH), akaganeite (-FeOOH), lepidocrocite (-FeOOH), and feroxyhyte (-FeOOH) were synthesized and fully characterized by X-ray diffraction, electron microscopy, UV/Visible spectrophotometry, Brunauer-Emmett-Teller (BET) measurements, and X-ray photoemission spectroscopy. The relationship between these iron oxyhydroxide polymorphs and their photocatalytic properties was explored by examining the extent of methylene blue (MB) degradation by each polymorph under visible-light irradiation. Feroxyhyte exhibited the best photocatalytic properties and degraded 85% of the MB dye in five hours. In comparison, goethite, akaganeite, and lepidocrocite degraded only 40%, 35%, and 30% of the MB in five hours, respectively. To understand this trend, the surface area, particle size and shape, and electronic band properties were systematically studied and discussed. It was found that the rate of MB degradation relates mainly to the surface area of the FeOOH polymorphs more than any other factor. This is the first report of a comparative study of the physical, electronic, and photocatalytic properties of all four polymorphs of nanostructured iron oxyhydroxides.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据