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Structures, formation mechanisms, and ion exchange properties of alpha-, beta-, and gamma-Na2TiO3
Meng, Fancheng1,2,3; Liu, Yahui1,2; Xue, Tianyan1,2; Su, Qian2,3; Wang, Weijing1,2; Qi, Tao1,2
2016
Source PublicationRSC Advances
ISSN2046-2069
Volume6Issue:113Pages:112625-112633
Abstract

alpha-, beta-, and gamma-Na2TiO3 were prepared from rutile TiO2 and molten NaOH. Three models of beta-Na2TiO3 with space groups of R (3) over bar, P (1) over bar, and P (3) over bar were proposed, and the R (3) over bar model was refined from the experimental data by using the Rietveld method. The structure of beta-Na2TiO3 is a superstructure of alpha-Na2TiO3 and supposedly contains Ti6O19 clusters. The structures of Na2TiO3 were mainly determined by the particle sizes of rutile and the reaction temperatures. alpha-Na2TiO3 could be prepared from fine rutile particles (D(50) < 25.8 mu m) and molten NaOH at 500 degrees C or quenching the melt of Na2TiO3 at 1000 degrees C quickly. gamma- and beta-Na2TiO3 were the thermodynamically stable phases of Na2TiO3 at around 500 degrees C and above 800 degrees C, respectively. alpha-Na2TiO3 was formed far beyond the thermodynamically stable state. The Na+ in alpha-Na2TiO3 was easier to exchange with H+ in water than that in beta or gamma phases. They all converted to amorphous phases after the 2nd, 6th, and 4th water washings at 25 degrees C, respectively. beta-Na2TiO3 followed similar paths of ion exchange as alpha-Na2TiO3, which was different from that of gamma-Na2TiO3.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c6ra16984h
Indexed BySCI
Language英语
WOS KeywordSODIUM TITANATE NANOWIRES ; TITANIUM-DIOXIDE PIGMENT ; FURNACE MOLTEN SLAG ; NANOSTRUCTURED MATERIALS ; SORPTION BEHAVIOR ; CRYSTAL-STRUCTURE ; CATION-EXCHANGER ; OXIDE INDUSTRY ; TIO2 ; NANOTUBES
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Basic Research Program of China(2013CB632604) ; National Science Foundation for Distinguished Young Scholars of China(51125018) ; Key Research Program of the Chinese Academy of Sciences(KGZD-EW-201-2) ; National Natural Science Foundation of China(51374191 ; 51402303)
WOS IDWOS:000389708700115
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21844
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Meng, Fancheng,Liu, Yahui,Xue, Tianyan,et al. Structures, formation mechanisms, and ion exchange properties of alpha-, beta-, and gamma-Na2TiO3[J]. RSC Advances,2016,6(113):112625-112633.
APA Meng, Fancheng,Liu, Yahui,Xue, Tianyan,Su, Qian,Wang, Weijing,&Qi, Tao.(2016).Structures, formation mechanisms, and ion exchange properties of alpha-, beta-, and gamma-Na2TiO3.RSC Advances,6(113),112625-112633.
MLA Meng, Fancheng,et al."Structures, formation mechanisms, and ion exchange properties of alpha-, beta-, and gamma-Na2TiO3".RSC Advances 6.113(2016):112625-112633.
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