Effect of oxalic acid-leaching levels on structure, color and physico-chemical features of palygorskite | |
Department | 甘肃省黏土矿物应用重点实验室 |
Lu YS (卢予沈)1,2; Wang WB (王文波)1; Wang Q (汪琴)1; Xu J (许江)1; Wang AQ (王爱勤)1 | |
The second department | 功能复合材料组 |
2019-12 | |
Source Publication | Applied Clay Science |
Volume | 183Issue:无Pages:105301 |
Abstract | Palygorskite (Pal) was treated with organic acids to explore effects of acid-leaching levels on its structure, shape of rod crystals, color and physico-chemical features. The leaching behavior of octahedral cations of Pal was studied by evaluating the effect of organic acid types, concentration and reaction time. The results show that oxalic acid (OA) has the strongest ability to leach octahedral metal cations in selected organic acids. OA, having acidity, complexing ability and reduction ability, can be attached to the surface of Pal to promote the leaching reaction, and the position at which the reaction occurs is concentrated on the cylinder surface of the rod crystal. The occupied position of metal cations in the octahedral sheets is the key factor in controlling the leaching of Pal. Mg2+ ions at the edge of the octahedral sheet prefer to leach out, then gradually deepens into the interior octahedral sheet, and Fe3+ and Al3+ ions are leached in turn. When the metal cations are almost completely leached, it means that the octahedral sheets are almost eliminated, at this time, the stacked structure is maintained by the deformed tetrahedron. Compared to conventional inorganic acid leaching methods, organic acid leaching does not destroy the shape of the Pal nanorods. Finally, the one-dimensional amorphous silica nanorods with high SiO2 content of 91.68 wt%, decent rod length, large specific surface area (323 m2/g), high porosity and high whiteness (L* = 86.6, a* = 0.1, b* = 3.2) were obtained by leaching with 1 M OA solution for 120 h, indicating that the non-destructive dissolution of the Pal was achieved. |
Keyword | Palygorskite Organic acid Leaching Morphology Silica |
MOST Discipline Catalogue | 工学::材料科学与工程(可授工学、理学学位) |
DOI | 10.1016/j.clay.2019.105301 |
URL | 查看原文 |
Indexed By | SCI |
If | 3.89 |
Language | 英语 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/25391 |
Collection | 甘肃省黏土矿物应用研究重点实验室 |
Corresponding Author | Wang WB (王文波); Wang AQ (王爱勤) |
Affiliation | 1.Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China 2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China |
Recommended Citation GB/T 7714 | Lu YS ,Wang WB ,Wang Q ,et al. Effect of oxalic acid-leaching levels on structure, color and physico-chemical features of palygorskite[J]. Applied Clay Science,2019,183(无):105301. |
APA | Lu YS ,Wang WB ,Wang Q ,Xu J ,&Wang AQ .(2019).Effect of oxalic acid-leaching levels on structure, color and physico-chemical features of palygorskite.Applied Clay Science,183(无),105301. |
MLA | Lu YS ,et al."Effect of oxalic acid-leaching levels on structure, color and physico-chemical features of palygorskite".Applied Clay Science 183.无(2019):105301. |
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OA palygorskite.pdf(3477KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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