Synthesis, Characterization, and Optical Properties of Mg²⁺ and Ni²⁺ Doped ZnO Ceramic Ultrafine Fibers

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-07-16 DOI:10.1007/s10562-025-05115-4

Leonardo G. de Medeiros, Joyce M. P. Silva, Alan J. L. de Melo, Marcio D. Teodoro, Mauricio R. D. Bomio, Loong-Tak Lim, Fabiana V. Motta

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Abstract

Photocatalysts are crucial for environmental remediation due to their ability to generate reactive oxidizing species under light irradiation. In this study, zinc oxide (ZnO) ultrafine fibers were synthesized via electrospinning followed by calcination, and doped with nickel (Ni) and magnesium (Mg) to enhance their photocatalytic performance. The fibers maintained the wurtzite ZnO crystalline structure after doping, while exhibiting reduced crystallite size and, in some cases, increased surface area—factors that contributed to improved photocatalytic activity. Photocatalytic performance was evaluated through the degradation of methylene blue (MB) and crystal violet (CV) dyes under UV and solar irradiation. The sample doped with 8% Mg achieved over 90% degradation efficiency of MB under UV light. In contrast, the co-doped sample with 2% Mg and Ni showed enhanced activity under sunlight, highlighting its potential for solar-driven water treatment, including in reuse cycles. Characterization techniques including XRD, SEM, XPS, UV–Vis, PL, and BET supported these findings. These results demonstrate that metal-doped ZnO ultrafine fibers possess optimized structural and optical properties, making them promising candidates for sustainable environmental remediation technologies.

Graphical Abstract

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Mg 2 +和Ni 2 +掺杂ZnO陶瓷超细光纤的合成、表征及光学性能

光催化剂在光照射下能够产生活性氧化物质，因此在环境修复中具有重要意义。在本研究中，通过静电纺丝和煅烧合成氧化锌（ZnO）超细纤维，并掺杂镍（Ni）和镁（Mg）来增强其光催化性能。掺杂后的纤维保持了纤锌矿ZnO晶体结构，同时显示出晶体尺寸减小，在某些情况下，表面积增加，这些因素有助于提高光催化活性。通过紫外和太阳照射对亚甲基蓝（MB）和结晶紫（CV）染料的降解，评价了其光催化性能。掺入8% Mg的样品在紫外光下对MB的降解效率达到90%以上。相比之下，含有2% Mg和Ni的共掺杂样品在阳光下表现出增强的活性，突出了其在太阳能驱动的水处理方面的潜力，包括在重复使用循环中。表征技术包括XRD， SEM， XPS, UV-Vis， PL和BET支持这些发现。这些结果表明，金属掺杂ZnO超细光纤具有优化的结构和光学性能，使其成为可持续环境修复技术的有希望的候选者。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.