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题名: Electrical and thermoelectric attributes of Ba2Co2Fe12-2x(Ti-Mn)(x)O-22 and their catalytic activity for complete N2O decomposition
作者: Ul-ain, Barkat1, 2, 3;  Ahmed, Safeer1;  Rehman, M. Anis Ur4;  Huang, Yanqiang2;  Randall, Clive A.3
刊名: NEW JOURNAL OF CHEMISTRY
发表日期: 2013
DOI: 10.1039/c3nj00309d
卷: 37, 期:9, 页:2768-2777
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A series of Ti-Mn co-doped Ba2Co2Fe12-2x(Ti-Mn)(x)O-22 (x = 0.2-1.0) Y type hexaferrites has been synthesized by sol-gel method. Single phase hexagonal crystal structure was confirmed by X-ray diffraction analysis and Rietveld refinement with a crystallite size of 30-54 nm of the particles. Ti-Mn doping was uniform in the grains and there was no effect on the microstructure. Alternating current conductivity and dielectric properties were studied over a range of frequencies (20 Hz-3 MHz) for all the compositions. The resistivity increased with the dopant content while the dielectric constant decreased due to valence alteration of Fe3+ ions from the octahedral site by the dopants. Thermoelectric studies along with direct current resistivity results established the electron hopping conduction mechanism in the doped ferrites. The doped hexaferrites were used for the first time as the catalysts for complete N2O decomposition at a low temperature of 873 K. The electronic properties along with surface vacancies were found to be responsible for their efficient catalytic activity. Stability of the prepared material for several hours at the reaction temperature added to its catalytic application.
关键词[WOS]: MG-ZN FERRITES ;  DIELECTRIC-PROPERTIES ;  MAGNETIC-PROPERTIES ;  HEXAGONAL FERRITES ;  NITROUS-OXIDE ;  SOL-GEL ;  CATION DISTRIBUTION ;  TI FERRITES ;  BEHAVIOR ;  CONDUCTIVITY
语种: 英语
WOS记录号: WOS:000323110700024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137929
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.Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Penn State Univ, Mat Res Inst, Ctr Dielectr Studies, University Pk, PA 16802 USA
4.COMSATS Inst Informat Technol, Dept Phys, Islamabad, Pakistan

Recommended Citation:
Ul-ain, Barkat,Ahmed, Safeer,Rehman, M. Anis Ur,et al. Electrical and thermoelectric attributes of Ba2Co2Fe12-2x(Ti-Mn)(x)O-22 and their catalytic activity for complete N2O decomposition[J]. NEW JOURNAL OF CHEMISTRY,2013,37(9):2768-2777.
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