通过Ca/Ba单极性和共掺杂调整高效可见光LaFeO3光催化剂的光学、介电和磁性能

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-04-21 DOI:10.1016/j.matchemphys.2025.130916

Mohammed Ahmed Wahba , Mohamed Masoud Gad Abdelkader , E.H. El-Mossalamy

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引用次数: 0

摘要

镧系铁氧体（LaFeO3）是一种多功能过氧化物，通过在 A 位单掺杂和共掺杂 Ca 和 Ba，对其进行了系统改性，以增强其结构、光学、磁学和光催化性能。XRD 证实了掺杂的成功，掺 Ba 的样品显示出最大的晶格膨胀，而掺 Ca 的样品则显示出很高的结晶度。扫描电子显微镜（SEM）和透射电子显微镜（TEM）显示了纳米级材料和掺杂引起的形态变化，共掺杂样品显示出更多的团聚和结构变化。傅立叶变换红外光谱（FTIR）显示，Fe-O 振动发生了变化，表明键强度发生了改变。对 C2B2LF（2 % Ca 和 2 % Ba）样品的 XPS 分析证实了 Ca 和 Ba 的存在，验证了掺杂的成功，并表明铁的氧化态为 Fe3+ 和 Fe4+ 混合，支持其在电荷转移过程中的作用。光学分析表明，带隙减小（1.83-2.13 eV），共掺杂的 C2B2LF 带隙值最低（1.83 eV），可见光吸收增强。掺杂也影响了介电性能和磁性能，BLF（掺杂 4%Ba 的 LaFeO3）显示出最高的饱和磁化（19.07 emu/g）和最低的矫顽力，而 CLF（掺杂 4%Ca 的 LaFeO3）则显示出最高的矫顽力（194.46 Oe）。C2B2LF 表现出卓越的光催化性能，在 120 分钟内实现了几乎完全的染料降解，这归功于优化的能带结构、改善的电荷分离和增强的活性氧形成。这些结果凸显了掺杂 LaFeO3 在光催化和环境应用方面的潜力。

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Tailoring optical, dielectric, and magnetic properties of highly efficient visible-light LaFeO3 photocatalysts via Ca/Ba mono and Co-doping

Lanthanum ferrite (LaFeO₃), a multifunctional perovskite, was systematically modified via A-site mono- and co-doping with Ca and Ba to enhance its structural, optical, magnetic, and photocatalytic properties. XRD confirmed successful doping, with Ba-doped samples showing the largest lattice expansion and Ca-doped samples exhibiting high crystallinity. SEM and TEM revealed nanosized materials and the doping-induced morphological variations, with co-doped samples displaying increased agglomeration and structural modifications. FTIR indicated shifts in Fe–O vibrations, suggesting bond strength alterations. XPS analysis of the C2B2LF (2 % Ca and 2 % Ba) sample confirmed the presence of Ca and Ba, verifying successful doping, and indicated the oxidation state of Fe as a mix of Fe³⁺ and Fe⁴⁺, supporting its role in charge transfer processes. Optical analysis showed reduced band gaps (1.83–2.13 eV), with co-doped C2B2LF achieving the lowest value (1.83 eV) and enhanced visible-light absorption. Doping also influenced dielectric and magnetic properties, with BLF (4 %Ba-doped LaFeO₃) showing the highest saturation magnetization (19.07 emu/g) and lowest coercivity, while CLF (4 %Ca-doped LaFeO₃) exhibited the highest coercivity (194.46 Oe). C2B2LF demonstrated superior photocatalytic performance, achieving nearly complete dye degradation within 120 min, attributed to optimized band structure, improved charge separation, and enhanced reactive oxygen species formation. These results highlight the potential of doped LaFeO₃ for photocatalytic and environmental applications.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.