Nanoscale chemomechanical variations of montmorillonite induced by the specificity of counterions-An in situ XRD and AFM study
文献类型：期刊论文
| 作者 | Wang, Yingya1,2,3; Ran, Lingyu1,2,3; Ma, Lingya1,2,3; Zhu, Runliang1,2,3 ; Wei, Jingming1,2,3; Liu, Hongmei1,2,3; Xi, Yunfei4,5; Zhu, Jianxi1,2,3; He, Hongping1,2,3
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| 刊名 | APPLIED CLAY SCIENCE
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 232页码:8 |
| 关键词 | Montmorillonite-water-salt Interlayer water Electric double layer In situ XRD High-resolution AFM |
| ISSN号 | 0169-1317 |
| DOI | 10.1016/j.clay.2022.106760 |
| 英文摘要 | The variable structural characteristics of montmorillonite (Mnt) in salt solutions depend not only on the quantity and distribution of the Mnt layer charge, but also on the specificity of counterions, including their radius, valence, concentration, and hydratability. In order to determine the nanoscale chemomechanical processes in a clay mineral-water-salt system, in situ X-ray diffraction (XRD) and atomic force microscopy (AFM) methods were used to investigate the structural variations of Mnt caused by different counterion species (e.g., Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, and Sr2+) at different concentrations (0.2-3.0 M). With an increasing concentration of counterions, separation of water molecules from the interlayer space of more weakly hydrated cations (Cs+, Rb+, and K+) is faster than for the more strongly hydrated cations (Li+, Na+, Mg2+, Ca2+, and Sr2+), water molecules are lost more slowly from the hydration shell, which remains stable even at high counterion concentrations. The sequential ion exchange in a monolayer Mnt observed by in situ AFM is consistent with the d((001)) results from the real-time XRD analysis. Moreover, various defects on Mnt surfaces were visible in the high-resolution AFM images, which restrict the spatial arrangement of adsorbed cations. The water molecule partitioning between the interlayers in Mnt is controlled by the specificity of the counterions, and the cations can spontaneously form ordered structures on the surface of Mnt. These nonclassical interfacial phenomena occurred in the electric double layer (EDL) is controlled by the hydration of counterions, the surface structure and the charge distribution of Mnt. |
| WOS研究方向 | Chemistry ; Materials Science ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001128781800001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76101]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Xi, Yunfei; Zhu, Jianxi |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Queensland Univ Technol QUT, Cent Analyt Res Facil CARF, Brisbane, Qld 4001, Australia 5.Queensland Univ Technol QUT, Sch Chem & Phys, Brisbane, Qld 4001, Australia |
| 推荐引用方式 GB/T 7714 | Wang, Yingya,Ran, Lingyu,Ma, Lingya,et al. Nanoscale chemomechanical variations of montmorillonite induced by the specificity of counterions-An in situ XRD and AFM study[J]. APPLIED CLAY SCIENCE,2023,232:8. |
| APA | Wang, Yingya.,Ran, Lingyu.,Ma, Lingya.,Zhu, Runliang.,Wei, Jingming.,...&He, Hongping.(2023).Nanoscale chemomechanical variations of montmorillonite induced by the specificity of counterions-An in situ XRD and AFM study.APPLIED CLAY SCIENCE,232,8. |
| MLA | Wang, Yingya,et al."Nanoscale chemomechanical variations of montmorillonite induced by the specificity of counterions-An in situ XRD and AFM study".APPLIED CLAY SCIENCE 232(2023):8. |
入库方式： OAI收割
来源：广州地球化学研究所
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