在操作中,异常的X射线粉碎衍射与X射线吸收光谱学交叉使用XMaS光束线上的扫描2D成像探测器:设计,实施和性能
Dariusz Wardecki1,2, Paul B J Thompson3, Kinga Mlekodaj2
1Faculty of Physics University of Warsaw Pasteura 5 Warsaw02-193 Poland.
概括
我们开发了一种使用扫描平板探测器进行高质量的异常X射线粉碎衍射 (AXPD) 和X射线吸收光谱 (XAS) 的新方法. 这种技术在in situ或operando研究中增强了元素分析和反应部位识别.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 频谱学是一种光谱学.
背景情况:
- 异常X射线粉碎衍射 (AXPD) 突出了特定的元素和反应部位.
- 目前使用静态探测器的方法在可实现的Q范围和能量模式方面存在局限性.
- 现场和操作研究需要实时结构分析的先进技术.
研究的目的:
- 提出一种新方法,用于高质量的AXPD与传输X射线吸收光谱学 (XAS) 交错.
- 为了能够收集比静态探测器可以实现的更广泛的Q范围.
- 为了证明该方法在反应条件下的材料在现场/操作研究中的适用性.
主要方法:
- 使用平面成像探测器扫描大角度范围.
- 交错的AXPD测量与传输X射线吸收光谱学.
- 开发数据处理和工作流程,以从连续图像中准确地恢复衍射数据.
主要成果:
- 实现了高质量的AXPD数据,并扩展了Q范围.
- 成功恢复了常规和异常的X射线粉末衍射数据.
- 证明了该方法在现场/操作研究中的能力.
结论:
- 扫描式探测器方法对AXPD和XAS的静态探测器具有优势.
- 该技术是有效的跟踪反应期间的原子位置和安排.
- 适用于研究铜离子交换热的高温有氧激活,如Cu-mazzite.
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