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DOI | 10.1126/science.aaw9377 |
High-surface-area corundum by mechanochemically induced phase transformation of boehmite | |
Amrute, Amol P.1; Lodziana, Zbigniew2; Schreyer, Hannah1; Weidenthaler, Claudia1; Schueth, Ferdi1 | |
2019-10-25 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 366期号:6464页码:485-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Poland |
英文摘要 | In its nanoparticulate form, corundum (alpha-Al2O3) could lead to several applications. However, its production into nanoparticles (NPs) is greatly hampered by the high activation energy barrier for its formation from cubic close-packed oxides and the sporadic nature of its nucleation. We report a simple synthesis of nanometer-sized alpha-Al2O3 (particle diameter similar to 13 nm, surface areas similar to 140 m(2) g(-1)) by the mechanochemical dehydration of boehmite (gamma-AlOOH) at room temperature. This transformation is accompanied by severe microstructural rearrangements and might involve the formation of rare mineral phases, diaspore and tohdite, as intermediates. Thermodynamic calculations indicate that this transformation is driven by the shift in stability from boehmite to alpha-Al2O3 caused by milling impacts on the surface energy. Structural water in boehmite plays a crucial role in generating and stabilizing alpha-Al2O3 NPs. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493177900046 |
WOS关键词 | HYDROTHERMAL SYNTHESIS ; ALUMINA ; ENERGY ; STABILITY ; DEHYDRATION ; HYDROXIDES ; REDUCTION ; MECHANISM ; CATALYSTS ; DIASPORE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/202641 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Max Planck Inst Kohlenforsch, Dept Heterogeneous Catalysis, Kaiser Wilhelm Pl 1, D-45470 Mulheim, Germany; 2.Polish Acad Sci, INP, Ul Radzikowskiego 152, PL-31342 Krakow, Poland |
推荐引用方式 GB/T 7714 | Amrute, Amol P.,Lodziana, Zbigniew,Schreyer, Hannah,et al. High-surface-area corundum by mechanochemically induced phase transformation of boehmite[J]. SCIENCE,2019,366(6464):485-+. |
APA | Amrute, Amol P.,Lodziana, Zbigniew,Schreyer, Hannah,Weidenthaler, Claudia,&Schueth, Ferdi.(2019).High-surface-area corundum by mechanochemically induced phase transformation of boehmite.SCIENCE,366(6464),485-+. |
MLA | Amrute, Amol P.,et al."High-surface-area corundum by mechanochemically induced phase transformation of boehmite".SCIENCE 366.6464(2019):485-+. |
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