Hematite Facet Confined Ferrous Ions as High Efficient Fenton Catalysts to Degrade Organic Contaminants by Lowering H2O2 Decomposition Energetic Span

摘要：

　　In this study,we demonstrate that ferrous ions confined on the hematite facets can significantly promote the H2O2 decomposition to produce ·OH for more efficient organic contaminants degradation than the unconfined counterparts,while hematite nanorods with exposed 001 and 110 facets exhibit better confining effect than nanoplates with exposed 001 facets.Experimental results revealed that the H2O2 decomposition efficiency of hematite facet confined ferrous ions was not only affected by the amount of surface confined ferrous ions,but also governed by the binding mode of ferrous ions on the hematite facets.We interestingly found that the polar 110 facets could confine ferrous ions of higher density with a five-coordination binding mode and thus lower the H2O2 decomposition energetic span more efficiently than the nonpolar 001 facets to confine ferrous ions with a six-coordination binding mode.This study can deepen our understanding on the enhanced reactivity of ferrous ions bound on the surface of iron oxides,and also shed light on the design of high efficient heterogeneous Fenton catalysis.

关键词： Hematite Architectures Structure-Dependent Reactivity Fenton Oxidation Confined Ferrous Ions Energetic Span

作者: HUANG Xiaopeng HOU Xiaojing ZHAO Jincai ZHANG Lizhi

作者单位: Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, Peoples Republic of China

会议类型: 国际会议

会议名称: 2015 International Symposium on Environmental Science and Technology (2015 ISEST)(2015环境科学与技术国际会议)

会议地点: 重庆

会议语种:英文

页码: 50-55

在线出版日期: 2015-11-18（万方平台首次上网日期，不代表论文的发表时间）