Structures, formation mechanisms, and ion exchange properties of alpha-, beta-, and gamma-Na2TiO3 | |
Meng, Fancheng1,2,3![]() | |
刊名 | RSC Advances
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2016 | |
卷号 | 6期号:113页码:112625-112633 |
ISSN号 | 2046-2069 |
英文摘要 | 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. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Multidisciplinary |
研究领域[WOS] | Chemistry |
关键词[WOS] | SODIUM TITANATE NANOWIRES ; TITANIUM-DIOXIDE PIGMENT ; FURNACE MOLTEN SLAG ; NANOSTRUCTURED MATERIALS ; SORPTION BEHAVIOR ; CRYSTAL-STRUCTURE ; CATION-EXCHANGER ; OXIDE INDUSTRY ; TIO2 ; NANOTUBES |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000389708700115 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/21844] ![]() |
专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
作者单位 | 1.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 |
推荐引用方式 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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