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题名: Fabrication of Yolk/Shell Partially Inverse Spinel Cobalt Ferrite/Mesoporous Silica Nanostructured Catalysts for Organic Pollutants Degradation by Peroxymonosulfate Activation
作者: Zhu, Kaixin1, 2;  Jin, Changzi1;  Klencsar, Zoltan3;  Wang, Junhu1
关键词: Yolk/shell ;  Partially inverse spinel cobalt ferrite ;  Peroxymonosulfate ;  Dye degradation
刊名: CATALYSIS LETTERS
发表日期: 2017-07-01
DOI: 10.1007/s10562-017-2042-4
卷: 147, 页:1732-1743
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Sulfate radical based advanced oxidation process has received popular attention in organic pollutants degradation recently, including which, cobalt ferrite heterogeneous catalyst was reported to be an effective activator. However, issues of particle aggregation and metal leaching still made the activity and stability not so satisfactory. In this study, well-defined partially inverse spinel cobalt ferrite/mesoporous silica ((Co (x) Fe1-x )[Co1-x Fe1+x ]O-4@mSiO(2)) nanostructured catalysts with uniform yolk/shell architecture were synthesized successfully through a hard-templating method for the first time. The prepared catalysts were characterized by various techniques including X-ray diffraction, transmission electron microscopy, N-2 physical adsorption/desorption. And moreover, Mossbauer spectroscopy was employed to confirm the detailed structure of the partially inverse spinel cobalt ferrite. It was shown that the synthesized catalysts consisted of (Co0.21Fe0.79)[Co0.79Fe1.21]O-4 nanoparticles encapsulated in mSiO(2) hollow spheres and the content of cobalt ferrite can be controlled by varying experimental conditions. The catalysts were utilized as peroxymonosulfate catalytic activator for organic pollutant degradation. Both sulfate radical and hydroxyl radical were certified as intermediate active species during the dye pollutants degradation process. Compared to the conventional mSiO(2) supported and naked cobalt ferrites, the yolk/shell nanostructured catalysts exhibited higher activity, excellent reaction stability and sintering resistance. It is clear that the design of such yolk/shell architecture can promote the development of highly efficient catalytic nanomaterials applied to degradation of organic pollutants.
关键词[WOS]: ACTIVE HETEROGENEOUS CATALYST ;  ACID ORANGE 7 ;  CORE-SHELL ;  CARBON SPHERES ;  EFFICIENT DEGRADATION ;  MAGNETIC-PROPERTIES ;  AQUEOUS-SOLUTION ;  DOPED GRAPHENE ;  OXIDATION ;  NANOPARTICLES
语种: 英语
WOS记录号: WOS:000403355400014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152210
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Hungarian Acad Sci, Nucl Anal & Radiog Dept, Ctr Energy Res, Inst Energy Secur & Environm Safety, Konkoly Thege Miklos Ut 29-33, H-1121 Budapest, Hungary

Recommended Citation:
Zhu, Kaixin,Jin, Changzi,Klencsar, Zoltan,et al. Fabrication of Yolk/Shell Partially Inverse Spinel Cobalt Ferrite/Mesoporous Silica Nanostructured Catalysts for Organic Pollutants Degradation by Peroxymonosulfate Activation[J]. CATALYSIS LETTERS,2017,147:1732-1743.
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