Growth of Y3+ doped CeO2 films and their structural, optical, photoluminescence, and gas sensing studies

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-07-18 DOI:10.1007/s10971-025-06860-z

Mohamed Benghanem, Zubair Ahmad, Mohd. Shkir, Thamraa Alshahrani

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Abstract

In the recent past, the development of sensors for harmful gas sensing has been in great demand. Hence, herein, the (0, 1, 2, 3, 4, & 5 wt.%) Yttrium(III)-doped CeO₂ thin films were synthesized using the Nebulizer-assisted spray pyrolysis method for ammonia gas sensing applications. The films exhibited a polycrystalline structure with a cubic phase and a porous morphology, indicating homogeneous crystallization. The surface roughness of the films were increased with Yttrium doping concentration, attributed to the incorporation of Yttrium ions into the Ce sites of CeO₂. UV-Vis-NIR spectroscopy revealed an enhanced absorption in the red region, suggesting the presence of free electrons, which are beneficial for gas sensing. The Yttrium-doped CeO₂ films showed a reduced band gap, thus enhancing their suitability for gas sensing applications. Photoluminescence studies confirmed the presence of free electrons with a sharp blue emission peak at 478 nm, suggesting its application as blue LED. Gas sensing tests demonstrated an increased current value with higher NH₃ concentrations, with the 3% Y-doped CeO₂ thin film showing the best performance. Repeatability tests confirmed a stable gas response over 15 cycles at 250 ppm NH₃, ensuring the reliability and long-term stability of the 3% Yttrium-doped CeO₂ thin film as an effective and durable gas sensing material for industrial applications.

Graphical Abstract

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Y3+掺杂CeO2薄膜的生长及其结构、光学、光致发光和气敏研究

近年来，对有害气体传感传感器的开发有很大的需求。因此，在这里，（0,1,2,3,4,& 5） wt。采用雾化器辅助喷雾热解法合成了%)钇（III）掺杂CeO2薄膜，用于氨气传感。薄膜呈现出立方相的多晶结构和多孔形态，表明结晶均匀。随着钇掺杂浓度的增加，膜的表面粗糙度增加，这是由于钇离子在CeO2的Ce位点上的掺入。紫外-可见-近红外光谱显示红色区域的吸收增强，表明存在自由电子，这有利于气体传感。掺钇的CeO2薄膜显示出更小的带隙，从而增强了它们在气敏应用中的适用性。光致发光研究证实了自由电子的存在，在478 nm处有一个明显的蓝色发射峰，表明其可用于蓝色LED。气敏测试表明，随着NH3浓度的增加，电流值增加，其中掺y 3%的CeO2薄膜表现出最好的性能。可重复性测试证实了在250 ppm NH3下超过15个循环的稳定气体响应，确保了3%钇掺杂CeO2薄膜作为工业应用中有效和耐用的气敏材料的可靠性和长期稳定性。图形抽象

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.