Investigating the Synergistic Effect of Decoration and Doping in Silver/Strontium Titanate for Air Remediation.

IF 4.4 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2024-10-16 DOI:10.3390/nano14201663

Marcela Frías Ordóñez, Elisabetta Sacco, Marco Scavini, Giuseppina Cerrato, Alessia Giordana, Ermelinda Falletta, Claudia Letizia Bianchi

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Abstract

Strontium titanate (STO) and its variants have emerged as leading materials in photocatalysis, particularly for degrading nitrogen oxides (NOx), due to their non-toxic nature, structural adaptability, and exceptional thermal stability. Although the one-pot sol-gel method leads to high-quality photocatalysts, areas remain for improvement. This study examines the impact of ethanol as a cosolvent in STO synthesis, focusing on optimizing the water-to-ethanol volume ratio. The findings reveal that a 1:3 ratio significantly enhances macropore formation and photocatalytic efficiency, achieving 42% NOx degradation under LED within three hours. Furthermore, incorporating 8.0 wt.% Ag into STO substantially improves visible light absorption and enables complete NOx elimination, thanks to enhanced charge separation and localized surface plasmon resonance. Even at high temperatures (1100 °C), the Ag-STO photocatalyst maintains partial activity, despite exceeding silver's melting point. These results highlight the potential of STO-based materials for industrial applications, positioning them as a promising solution for effective NOx mitigation.

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研究银/钛酸锶在空气净化中的装饰和掺杂协同效应。

钛酸锶（STO）及其变体因其无毒性、结构适应性和优异的热稳定性，已成为光催化领域，特别是降解氮氧化物（NOx）领域的主要材料。虽然一锅溶胶-凝胶法可以制备出高质量的光催化剂，但仍有需要改进的地方。本研究探讨了乙醇作为共溶剂对 STO 合成的影响，重点是优化水与乙醇的体积比。研究结果表明，1:3 的比例可显著增强大孔的形成和光催化效率，在三小时内在 LED 下实现 42% 的氮氧化物降解。此外，由于增强了电荷分离和局部表面等离子体共振，在 STO 中加入 8.0 wt.% 的 Ag 可大幅提高可见光吸收率，并能完全消除氮氧化物。即使在高温（1100 °C）条件下，Ag-STO 光催化剂仍能保持部分活性，尽管其温度已超过银的熔点。这些结果凸显了基于 STO 的材料在工业应用中的潜力，使其成为有效缓解氮氧化物的一种有前途的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.