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题名: Thermodynamic Studies of Rod- and Spindle-Shaped beta-FeOOH Crystals
作者: Wei, Chengzhen1;  Wang, Xiaoming1;  Nan, Zhaodong1;  Tan, Zhicheng2
刊名: JOURNAL OF CHEMICAL AND ENGINEERING DATA
发表日期: 2010
DOI: 10.1021/je900373z
卷: 55, 期:1, 页:366-369
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Different morphologies of beta-FeOOH including rod- and spindle-shaped crystals were synthesized via a hydrothermal reaction at low temperature. The molar heat capacities of the obtained samples were determined by a precision automated adiabatic calorimeter over the temperature range of (78 to 390) K. The observed results demonstrated that the change of the molar heat capacity with thermodynamic temperature was different for the rod and spindle-shaped beta-FeOOH crystals. Polynomial equations of the molar heat capacities as a function of temperature were fitted by a least-squares method for the rod- and spindle-shaped beta-FeOOH crystals. Smoothed heat capacities and thermodynamic functions of the obtained samples, such as H(T/K) - H(298.15) and S(T/K) - S(298.15), were Calculated on the basis of the fitted polynomials and the relationships of the thermodynamic functions. In addition, the as-prepared samples were also characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA).
关键词[WOS]: ALPHA-FE2O3 NANORODS ;  ENTHALPY
语种: 英语
WOS记录号: WOS:000273405200056
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142228
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.Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou 225002, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Wei, Chengzhen,Wang, Xiaoming,Nan, Zhaodong,et al. Thermodynamic Studies of Rod- and Spindle-Shaped beta-FeOOH Crystals[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2010,55(1):366-369.
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