Heterogeneous and retarded phase transformation of ferrihydrite on montmorillonite surface: The important role of surface interactions
文献类型：期刊论文
| 作者 | Wei, Hongyan1,2,3; Liu, Jing5; Chen, Qingze1,2,3; Zhu, Runliang1,2,3 ; Yan, Lixia4; Yang, Yixuan1,2,3; Liang, Xiaoliang1,2,3; Zhu, Jianxi1,2,3; He, Hongping1,2,3
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| 刊名 | AMERICAN MINERALOGIST
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| 出版日期 | 2023-05-25 |
| 卷号 | 108期号:5页码:865-880 |
| 关键词 | Nanominerals and mineral nanoparticles ferrihydrite clay minerals surface interactions phase transformation |
| ISSN号 | 0003-004X |
| DOI | 10.2138/am-2022-8520 |
| 英文摘要 | The formation of heteroaggregates is critical to controlling the stabilization and transformation of nanominerals and mineral nanoparticles (NMMNs) in nature, but the underlying mechanisms remain to be deciphered. In this work, we study the effect of surface interactions between ferrihydrite (Fh) and montmorillonite (Mnt) within their heteroaggregates on the transformation behaviors of Fh. A series of heteroaggregates composed of Fh and Mnt were synthesized by modulating their mass ratios and synthesis methods, i.e., directly complexing Fh with Mnt (Fh-Mnt) or in situ growing Fh on Mnt (Fh/Mnt). Structural characterization using XRD, TG-DSC, TEM, and FTIR indicated that Fh particles coated more evenly on the Mnt surface within the heteroaggregates synthesized by in situ growing Fh on Mnt and with lower Fh to Mnt ratio, and accordingly these heteroaggregates showed stronger surface interactions between Fh and Mnt. The phase transformation of Fh to hematite (Hem) on the heteroaggregates can be significantly affected during the heating treatment. Compared with that of pure Fh, the transformation of Fh on all of the heteroaggregates was retarded (e.g., slower transformation rate and smaller produced Hem particles), particularly for the samples with stronger surface interactions (e.g., Fh/Mnt with lower Fh to Mnt ratio). Noticeably, the heated heteroaggregates may simultaneously contain pristine Fh, intermediate maghemite, and transformed Hem, showing a heterogeneous transformation behavior of Fh. The strong interactions between Fh and Mnt will enhance the dispersion of Fh and restrict the structural rearrangement of Fh (particularly those at the interface) during the phase transformation process, resulting in retarded and heterogenous transformation of Fh on these heteroaggregates. These findings not only enrich our knowledge of the phase transformation characteristics of Fh but also advance our understanding of the important role of mineral surface interactions in NMMNs in nature. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000989025200006 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74332]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Zhu, Runliang |
| 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 4.Shanxi Normal Univ, Sch Geog Sci, Taiyuan 030031, Peoples R China 5.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Taipa 999078, Macau, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Hongyan,Liu, Jing,Chen, Qingze,et al. Heterogeneous and retarded phase transformation of ferrihydrite on montmorillonite surface: The important role of surface interactions[J]. AMERICAN MINERALOGIST,2023,108(5):865-880. |
| APA | Wei, Hongyan.,Liu, Jing.,Chen, Qingze.,Zhu, Runliang.,Yan, Lixia.,...&He, Hongping.(2023).Heterogeneous and retarded phase transformation of ferrihydrite on montmorillonite surface: The important role of surface interactions.AMERICAN MINERALOGIST,108(5),865-880. |
| MLA | Wei, Hongyan,et al."Heterogeneous and retarded phase transformation of ferrihydrite on montmorillonite surface: The important role of surface interactions".AMERICAN MINERALOGIST 108.5(2023):865-880. |
入库方式： OAI收割
来源：广州地球化学研究所
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