用于监测铈中 Ce4+/Ce3+ 转变的 Eu3+ 发光探针的进展与局限性

IF 3.2 3区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry C Pub Date : 2025-01-12 DOI:10.1021/acs.jpcc.4c07466

Oleksii Bezkrovnyi, Maja Szymczak, Lukasz Marciniak, Vladyslav Seminko, Piotr Kraszkiewicz, Małgorzata Małecka, Mirosława Pawlyta, Michael Vorochta, Iva Matolínová

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引用次数: 0

摘要

互补结构（粉末XRD和STEM）、还原性（napp - xps和H2-TPR）以及尺寸为11-102 nm的铕掺杂二氧化铈纳米晶体的发光研究，确定了一种基于发光的新技术的进步和局限性，该技术可用于快速远程监测二氧化铈基材料中Ce3+/Ce4+的比例，这是确定基于ceo2的催化剂基团功能特性的关键因素。此外，SEM-EDS和UHV-XPS结合研究表明，铈纳米颗粒表面存在Eu的偏析，这显著影响了CeO2:Eu纳米晶体的光致发光性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Advances and Limitations of the Eu3+ Luminescent Probe for Monitoring Ce4+/Ce3+ Transitions in Ceria

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Advances and Limitations of the Eu3+ Luminescent Probe for Monitoring Ce4+/Ce3+ Transitions in Ceria

Complementary structure (powder XRD and STEM), reducibility (NAP-XPS and H₂-TPR), and luminescence studies of Eu-doped ceria nanocrystals of 11–102 nm in size have allowed to determine the advances and limitations of a new luminescence-based technique for fast remote monitoring of the Ce³⁺/Ce⁴⁺ ratio in ceria-based materials─a key factor in determining the functional properties of the CeO₂-based group of catalysts. In addition, the combination of SEM-EDS and UHV-XPS studies indicated the presence of segregation of Eu on the surface of ceria nanoparticles, which significantly affects the photoluminescence properties of the CeO₂:Eu nanocrystals.

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来源期刊

The Journal of Physical Chemistry C 化学-材料科学：综合

CiteScore

6.50

自引率

8.10%

发文量

2047

审稿时长

1.8 months

期刊介绍： The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.