Kamoun Olfa, Akkari Anis, Alhalaili Badriyah, Vidu Ruxandra, Turki-Kamoun Najoua
Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, 2092, Tunisia.
Nanotechnology and Advanced Materials Program, Kuwait Institute for Scientific Research, P.O. Box 24885, 13109, Safat, State of Kuwait.
Sci Rep. 2025 Jan 6;15(1):998. doi: 10.1038/s41598-024-84485-y.
In this study, we aimed to enhance the photocatalytic performance of molybdenum oxide (MoO) thin films by doping with silver (Ag) via a spray pyrolysis technique. The primary objective for silver incorporation was intended to introduce additional energy levels into the band structure of MoO, improving its efficiency. Structural, optical, and photocatalytic properties were analyzed using X-ray diffraction (XRD) and optical spectroscopy. XRD results confirmed an orthorhombic phase with a (040) preferential orientation for all samples. Optimal crystallinity was observed with 2% Ag doping, yielding an 84 nm crystallite size, while higher doping levels reduced crystallite size. Band gap energy narrowed from 3.07 eV (undoped) to 2.94 eV (2% Ag-doped), indicating electronic structure changes. Impedance spectroscopy revealed superior electrical properties at 4% Ag doping, enhancing charge transport. Photocatalytic performance, assessed via dye degradation, showed significant improvement with silver doping, the degradation rate peaking at 4% Ag. These results demonstrate that silver doping optimizes structural and electronic properties of MoO thin films, leading to enhanced photocatalytic activity.
在本研究中，我们旨在通过喷雾热解技术用银（Ag）掺杂来提高氧化钼（MoO）薄膜的光催化性能。掺入银的主要目的是在MoO的能带结构中引入额外的能级，提高其效率。使用X射线衍射（XRD）和光谱学对结构、光学和光催化性能进行了分析。XRD结果证实所有样品均为正交相，具有（040）择优取向。观察到2%Ag掺杂时结晶度最佳，晶粒尺寸为84nm，而较高的掺杂水平会减小晶粒尺寸。带隙能量从3.07eV（未掺杂）缩小到2.94eV（2%Ag掺杂），表明电子结构发生了变化。阻抗谱显示4%Ag掺杂时具有优异的电学性能，增强了电荷传输。通过染料降解评估的光催化性能表明，银掺杂后有显著改善，降解率在4%Ag时达到峰值。这些结果表明，银掺杂优化了MoO薄膜的结构和电子性能，从而提高了光催化活性。
