Local structure of low-temperature gamma-Al2O3 phases as determined by the luminescence of Cr3+ and Fe3+

Rastorguev Alexander; Baronskiy Mark; Zhuzhgov Aleksey; Kostyukov Anton; Krivoruchko Oleg; Snytnikov Valeriy

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Local structure of low-temperature gamma-Al2O3 phases as determined by the luminescence of Cr3+ and Fe3+

机译：Cr3 +和Fe3 +的发光确定了低温γ-Al2O3相的局部结构

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The gamma and gamma* phases of alumina synthesized from crystalline boehmite and pseudoboehmite were shown to strongly differ in some physicochemical characteristics. Photoluminescence of Cr3+ and Fe3+ as luminescent probes with their natural impurity concentrations was detected in the tested alumina samples and the local structure of the samples was examined. The crystal field strength and Racah parameters in gamma-Al2O3 phases were determined. The ratio of octahedral and tetrahedral cationic positions was equal to 1 for gamma-Al2O3 synthesized from crystalline boehmite, and 0.3 for that obtained from pseudoboehmite. The effect of residual OH groups and weakly bound molecular water on the local structure of gamma-Al2O3 phases was revealed. The luminescence of Cr3+ was detected in subsurface structures of each alumina; defects produced by nanocrystallites were shown to affect the luminescence.

机译：由结晶勃姆石和假勃姆石合成的氧化铝的γ相和γ*相在某些物理化学特性上显示出很大差异。在测试的氧化铝样品中检测到了具有天然杂质浓度的Cr3 +和Fe3 +作为发光探针的光致发光，并检查了样品的局部结构。确定了γ-Al2O3相中的晶体场强度和Racah参数。由结晶勃姆石合成的γ-Al2O3的八面体和四面体阳离子位置的比例等于1，而从假勃姆石获得的阳离子位置比为0.3。揭示了残余的OH基和弱结合的分子水对γ-Al2O3相的局部结构的影响。在每种氧化铝的亚表面结构中检测到Cr3 +的发光。纳米晶体产生的缺陷被证明会影响发光。

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《RSC Advances》 |2015年第8期|共9页
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Rastorguev Alexander; Baronskiy Mark; Zhuzhgov Aleksey; Kostyukov Anton; Krivoruchko Oleg; Snytnikov Valeriy;
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正文语种 eng
中图分类化学;
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1. Local structure of low-temperature gamma-Al2O3 phases as determined by the luminescence of Cr3+ and Fe3+ [J] . Rastorguev Alexander, Baronskiy Mark, Zhuzhgov Aleksey, RSC Advances . 2015,第8期

机译：Cr3 +和Fe3 +的发光确定了低温γ-Al2O3相的局部结构
2. Photoluminescence and Raman spectroscopy studies of low-temperature gamma-Al2O3 phases synthesized from different precursors [J] . Baronskiy Mark, Rastorguev Alexander, Zhuzhgov Aleksey, Optical Materials . 2016,第Mara期

机译：由不同前体合成的低温γ-Al2O3相的光致发光和拉曼光谱研究
3. Photoluminescence study of LiNbO3:Cr3+; W4+ at high pressure. Pressure dependence of spectroscopic parameters and local structure of Cr3+ [J] . Sanchez-Alejo M. A., Rodriguez F., Barreda-Argueso J. A., Optical Materials . 2016,第Octa期

机译：LiNbO3：Cr3 +的光致发光研究；
4. Photoluminescence and local structure analysis of Sm~(3+) ions in single phase TiO_(2) thin films [C] . X. Zhao, K. Ikegami, S. Ishiwata, International Conference on the Physics of Semiconductors . 2011

机译：单相TiO_（2）薄膜中SM〜（3+）离子的光致发光和局部结构分析
5. The effect of low-temperature swelling on the micropore structure of coal and model polymers as determined with a novel EPR-spin probe method. [D] . Spears, Dennis Ross. 1991

机译：低温溶胀对煤和模型聚合物的微孔结构的影响，采用新型EPR自旋探针法进行了测定。
6. A Multifunctional 3D Supermolecular Co Coordination Polymer With Potential for CO2 Adsorption Antibacterial Activity and Selective Sensing of Fe3+/Cr3+ Ions and TNP [O] . Xiaojing Zhou, Lili Liu, Hang Kou, 2021

机译：多功能3D超分子CO配位聚合物具有CO 2吸附抗菌活性和Fe3 + / Cr3 +离子和TNP的选择性感测
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机译：通过具有成本效率的金属离子的共掺杂延伸锌加仑盐的发光性质（Cr3 + / Mg2 +，Cr3 + / Ca2 +和Cr3 + / Sr2 +）

Local structure of low-temperature gamma-Al2O3 phases as determined by the luminescence of Cr3+ and Fe3+

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