NH3-probe X-ray photoelectron spectroscopy method to characterize solid acidity of clay minerals
文献类型：期刊论文
| 作者 | Liu, Hongmei2,3; Luo, Jinghan1,3; Liu, Dong2,3
|
| 刊名 | APPLIED CLAY SCIENCE
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 255页码:4 |
| 关键词 | X-ray photoelectron spectroscopy NH3 Solid acidity Clay minerals |
| ISSN号 | 0169-1317 |
| DOI | 10.1016/j.clay.2024.107416 |
| 英文摘要 | Accurate determination of solid acidity is essential for evaluating the catalytic activity of clay minerals. However, the conventional Fourier-transform infrared (FTIR) method using NH3 3 as the probe encounters challenges in measuring the solid acidity owing to the presence of water on the surface or within interlayer spaces of clay minerals as well as the influence of environmental water during the detection process. To mitigate water interference, a NH3-probe 3-probe X-ray photoelectron spectroscopy (XPS) approach was adopted as an alternative to the FTIR method for the identification and semi-quantification of solid acidity of clay minerals. Following NH3 3 adsorption, the types of solid acid sites in clay minerals were identified through the chemical shift in N1s XPS spectra. The ratio of Br & oslash;nsted and Lewis acid sites in a given sample and the relative concentration of acid sites across different samples were determined by examining the specific N1s peak area ratio. According to the XPS data, the ratios of Br & oslash;nsted and Lewis acid sites in Ca-montmorillonite (SAz-2) and Na-montmorillonite (SWy-2) were nearly 1:1, whereas that for the illite-smectite mixed-layer mineral (ISCz-1) was 4. The acid site contents in SAz-2 were more than twice those of SWy-2. This work highlights the promising application prospects of the NH3-probe 3-probe XPS method in solid acidity investigations of clay minerals. |
| WOS研究方向 | Chemistry ; Materials Science ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001292356700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80537]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Liu, Hongmei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Hongmei,Luo, Jinghan,Liu, Dong. NH3-probe X-ray photoelectron spectroscopy method to characterize solid acidity of clay minerals[J]. APPLIED CLAY SCIENCE,2024,255:4. |
| APA | Liu, Hongmei,Luo, Jinghan,&Liu, Dong.(2024).NH3-probe X-ray photoelectron spectroscopy method to characterize solid acidity of clay minerals.APPLIED CLAY SCIENCE,255,4. |
| MLA | Liu, Hongmei,et al."NH3-probe X-ray photoelectron spectroscopy method to characterize solid acidity of clay minerals".APPLIED CLAY SCIENCE 255(2024):4. |
入库方式： OAI收割
来源：广州地球化学研究所
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