启发Au@ZnS纳米粒子对亚甲基蓝染料的优越可见光催化作用

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-08-09 DOI:10.1016/j.jallcom.2025.182930

T. Akila, Parkavi Ravisankar, R. Mariappan, G. Umadevi, V. Balasubramani, S. Vijayan

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引用次数: 0

摘要

通过化学沉淀法成功合成了不同掺杂浓度（2、4和6 wt.%）的金（Au）掺杂ZnS纳米粒子，并对其结构、光学、形态和光催化性能进行了全面表征。x射线衍射（XRD）证实了ZnS的面心立方相晶体结构，其峰移表明Au的成功掺入没有结构畸变。FTIR光谱显示，由于au掺杂ZnS的相互作用，ZnS的振动模式发生了微小的位移。紫外可见光谱显示出吸收红移和反射率增强，而光致发光（PL）光谱显示出发射强度增加，表明非辐射复合减少。HRSEM图像显示出均匀的形貌和纳米尺度特征，具有清晰的晶格条纹。XPS证实了Zn、S和Au的元素组成和氧化态。通过亚甲基蓝（MB）染料在可见光下的降解评价Au@ZnS纳米粒子的光催化活性，与纯ZnS相比，其光催化活性有显著增强。这种改进归功于优异的光吸收，高效的载流子分离和Au的催化作用，显示出光催化应用的强大潜力。

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Enlightening Au@ZnS Nanoparticles for Superior Visible-Light Photocatalysis of Methylene Blue Dye

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Enlightening Au@ZnS Nanoparticles for Superior Visible-Light Photocatalysis of Methylene Blue Dye

Gold (Au)-doped ZnS nanoparticles with varying doping concentrations (2, 4, and 6 wt.%) were successfully synthesized via a chemical precipitation method and comprehensively characterized to investigate their structural, optical, morphological, and photocatalytic properties. X-ray diffraction (XRD) confirmed the face-centered Cubic phase crystalline structure of ZnS with peak shifts indicating successful Au incorporation without structural distortion. FTIR spectra revealed ZnS vibrational modes with minor shifts due to Au-doped ZnS interactions. UV–Vis spectroscopy exhibited red-shifted absorption and enhanced reflectance, while photoluminescence (PL) spectra showed increased emission intensity, suggesting reduced non-radiative recombination. HRSEM images displayed uniform morphology and nanoscale features with clear lattice fringes. XPS confirmed the elemental composition and oxidation states of Zn, S, and Au. The photocatalytic activity of the Au@ZnS nanoparticles, evaluated by methylene blue (MB) dye degradation under visible light, showed significant enhancement compared to pure ZnS. This improvement is attributed to superior light absorption, efficient charge carrier separation, and the catalytic role of Au, demonstrating strong potential for photocatalytic applications.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.