New evidence for microstructural evolution model of acid-activated montmorillonite
文献类型：期刊论文
| 作者 | He, HP; Guo, JG; Lin, HF; Li, LY |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2002-05-01 |
| 卷号 | 47期号:9页码:761-765 |
| 关键词 | montmorillonite Si-29 and Al-27 MAS NMR structural evolution |
| 英文摘要 | Ca-montmorillonite samples from Choushan treated at various acid concentrations were studied using chemical analysis, XRD, Si-29 and Al-27 MAS NMR, to investigate the microstructure of the activated montmorillonites. With the increase of acid concentration and dissolution of cations of montmorillonite, the intensity of d(001) decreased obviously and significant changes of the microstructure of Si and Al occurred. There were two new types of structural units of Si atoms formed: (SiO)(3)SiOH units and Q(4)(0Al) units. For Al atoms, in the course of activation, the removal of one of a pair of octahedral aluminium atoms from montmorillonite removed two hydroxyl groups and left the other aluminum of the pair in the four-fold coordination. The Al-27 signal at delta54.0 corresponding to Al-IV arose from the four-coordinated Al in the octahedral sheet. This study first confirmed, by Si-29 and Al-27 MAS NMR spectra, that the model of microstructural evolution for activated montmorillonite postulated by Thomas et al. (1950) is correct. |
| WOS标题词 | Science & Technology |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | NUCLEAR-MAGNETIC-RESONANCE ; SOLID-STATE NMR ; MAS NMR ; SI-29 ; AL-27 ; SILICAS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000174980900013 |
| 公开日期 | 2015-12-08 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8736]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Zhejiang Foreign Trade Co Ind Minerals, Hangzhou 310000, Peoples R China 3.Acad Sinica, Wuhan Inst Phys, Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, HP,Guo, JG,Lin, HF,et al. New evidence for microstructural evolution model of acid-activated montmorillonite[J]. CHINESE SCIENCE BULLETIN,2002,47(9):761-765. |
| APA | He, HP,Guo, JG,Lin, HF,&Li, LY.(2002).New evidence for microstructural evolution model of acid-activated montmorillonite.CHINESE SCIENCE BULLETIN,47(9),761-765. |
| MLA | He, HP,et al."New evidence for microstructural evolution model of acid-activated montmorillonite".CHINESE SCIENCE BULLETIN 47.9(2002):761-765. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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