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Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase
Zeitschrift für Kristallographie - Crystalline Materials ( IF 0.9 ) Pub Date : 2020-05-26 , DOI: 10.1515/zkri-2019-0051
Olesya Timaeva 1 , Vladimir Nikolaichik 2 , Roman Svetogorov 3 , Galina Kuz’micheva 1
Affiliation  

Abstract The detail investigation of the samples with nanodimensional anatase, formed by hydrolysis of TiOSO4 × xH2O without or in the presence of polymer poly(N-vinyl caprolactam), physical precipitation of the polymer followed by the capture of commercial Hombifine N are performed by X-ray powder diffraction using laboratory and synchrotron radiation sources, transmission electron microscopy with the diffraction, and elemental analysis. The two «core»-«shell» models with nanoparticles and their associates as a core can be applied to samples produced. The synchrotron and electron radiation change the degree of crystallinity and the imperfection of anatase, isolate of TiO2−x(OH)2x × yH2O from the nanoparticle shell with a decrease in its thickness, lead to the anatase – rutile phase transition. The double diffraction effect on the appearance of kinematically forbidden reflections caused by the dynamic character of the electron diffraction. The photoactivity depends on microstructural characteristics (specific surface, nanoobjects sizes). The structure and elemental composition of nanoparticles (associates) affect antimicrobial activity against Staphylococcus aureus and Escherichia coli.

中文翻译:

制备方法和诊断条件对纳米级锐钛矿组成和结构的影响

摘要 通过在聚合物聚(N-乙烯基己内酰胺)存在或不存在的情况下水解 TiOSO4 × xH2O 形成的纳米锐钛矿样品的详细研究,聚合物的物理沉淀,然后捕获商业 Hombifine N 由 X 进行。使用实验室和同步辐射源的 β 射线粉末衍射、带衍射的透射电子显微镜和元素分析。以纳米颗粒及其缔合体为核心的两种“核”-“壳”模型可应用于生产的样品。同步加速器和电子辐射改变了锐钛矿的结晶度和缺陷,从纳米颗粒壳中分离出 TiO2−x(OH)2x × yH2O,其厚度减小,导致锐钛矿-金红石相变。由电子衍射的动态特性引起的运动学禁止反射的出现的双重衍射效应。光活性取决于微观结构特征(比表面积、纳米物体尺寸)。纳米颗粒(相关物)的结构和元素组成影响对金黄色葡萄球菌和大肠杆菌的抗菌活性。
更新日期:2020-05-26
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