Heat capacity and thermodynamic functions of TiO2(B) nanowires

doi:10.1016/j.jct.2017.12.016

	Heat capacity and thermodynamic functions of TiO2(B) nanowires
	Feng, Tao ; Li, Liping ; Shi, Quan 1; Che, Xiangli 2; Xu, Xingliang ; Li, Guangshe
刊名	JOURNAL OF CHEMICAL THERMODYNAMICS
	2018
卷号	119 页码:127
关键词	TiO2(B) Heat capacity Thermodynamic properties PPMS
ISSN号	0021-9614
DOI	10.1016/j.jct.2017.12.016
英文摘要	Heat capacities of TiO2(B), 50 nm in diameter and several micrometers in length, containing given amounts of anatase were measured using a Quantum Design Physical Property Measurement System (PPMS) over a temperature range from 1.9 to 302 K. After eliminating the contribution from anatase, the heat capacities for TiO2(B) were fitted to a theoretical model in the low temperature range (T < 9 K), orthogonal polynomials in the middle temperature range (9 < T < 65 K), and a combination of Debye and Einstein functions in the high temperature range (T > 65 K). The standard molar heat capacity, molar entropy, and molar enthalpy for TiO2(B) at T = 298.15 K were determined to be (58.18 +/- 0.81) J.K-1.mol(-1), (52.31 +/- 0.69) J.K-1.mol(-1), and (9.03 +/- 0.12) kJ.mol(-1), respectively, leading to a Gibbs free energy of -(6.56 +/- 0.09) kJ.mol(-1). The heat capacity of TiO2(B) is found to be similar to brookite, but significantly higher than those of anatase and rutile when temperature is above 200 K. (C) 2018 Elsevier Ltd.
学科主题	Thermodynamics ; Chemistry, Physical
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000425191700013
资助机构	This work was financially supported by NSFC 21671077, 21771171, 21571176, 21611530688, and 21025104. ; This work was financially supported by NSFC 21671077, 21771171, 21571176, 21611530688, and 21025104.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25062]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Thermochem Lab,Liaoning Prov Key Lab Thermochem E, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Feng, Tao,Li, Liping,Shi, Quan,et al. Heat capacity and thermodynamic functions of TiO2(B) nanowires[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,2018,119:127, 134.
APA	Feng, Tao,Li, Liping,Shi, Quan,Che, Xiangli,Xu, Xingliang,&Li, Guangshe.(2018).Heat capacity and thermodynamic functions of TiO2(B) nanowires.JOURNAL OF CHEMICAL THERMODYNAMICS,119,127.
MLA	Feng, Tao,et al."Heat capacity and thermodynamic functions of TiO2(B) nanowires".JOURNAL OF CHEMICAL THERMODYNAMICS 119(2018):127.