The Effect of Cu Doping on Structural Distortions and Oxygen Vacancies in SrFeO3-δ

被引：0

作者：

Xie, Dong ^{[1
]}

Wu, Yiren ^{[1
]}

Hou, Hengjian ^{[1
]}

Lu, Zeyi ^{[1
]}

Wang, Chang Yang ^{[1
]}

Liu, Min ^{[1
,2
]}

Xia, Yan Fang ^{[1
]}

机构：

[1] Univ South China, Coll Nucl Sci & Technol, Hengyang 421001, Peoples R China

[2] Zhuhai Tsinghua Univ, Res Inst Innovat Ctr, 101 Univ Ave, Tangjiawan Zhuhai 519000, Peoples R China

来源：

NANO | 2025年

基金：

中国国家自然科学基金;

关键词：

SrFe1-xCuxO3-delta; m & ouml; ssbauer spectroscopy; oxygen vacancies; ELECTRONIC-STRUCTURE; PEROVSKITE; SIMULATION; EVOLUTION; MOSSBAUER; OXIDES; ATOMS; STATE;

D O I：

10.1142/S1793292025500080

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study utilized XRD and M & ouml;ssbauer spectroscopy to investigate the effects of copper ion doping on the structural properties and oxygen vacancies of SrFeO3-delta perovskite oxides. XRD analysis confirmed that all samples maintained a single-phase perovskite structure, with a decrease in lattice constants and contraction of unit cell volumes as copper doping increased. M & ouml;ssbauer spectroscopy indicated that increased copper doping caused a transition in the valence state of iron ions from Fe3.5+ to Fe4+, along with significant distortions in the Fe-O bond environment, reflecting local structural changes. The introduction of Cu2+ and Cu3+ ions increased oxygen vacancies, disrupting charge balance and ion radius compatibility, which in turn exacerbated lattice distortions. Iodometric titration further corroborated the rise in oxygen vacancies with higher copper content, offering important theoretical insights for advancing SrFeO3- based materials in energy conversion and storage applications.

引用

页数：8

共 35 条

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