One-Step Spray Pyrolysis Synthesis of ZnO/Ag Hollow Spheres for Enhanced Visible-Light-Driven Antibacterial Applications and Wound Healing

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Dalton Transactions Pub Date : 2024-12-16 DOI:10.1039/d4dt02581d

Hailong Miao, Haili Wang, Xiaoyue Feng, Hongwei Jiao

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Abstract

ZnO/Ag hollow particles were synthesized via a one-step spray pyrolysis method for enhanced antibacterial activity and wound healing applications. The hollow structure and uniform distribution of Ag nanoparticles within the ZnO matrix were confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). UV-Vis spectroscopy and Tauc plot analysis revealed a reduction in the bandgap, attributed to the surface plasmon resonance (SPR) of Ag, improving light absorption in the visible range. Antibacterial tests against Escherichia coli (E. coli) and methicillin-resistant Staphylococcus aureus (MRSA) showed that ZnO/Ag composites exhibited significantly enhanced antibacterial efficacy under visible light compared to pure ZnO. The antibacterial mechanism was investigated using electron paramagnetic resonance (EPR) spectroscopy, which confirmed the generation of reactive oxygen species (˙OH and ˙O₂⁻). These results indicate that ZnO/Ag hollow composites are promising candidates for antibacterial coatings and wound healing applications, especially under visible light activation.

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通过一步喷雾热解法合成了氧化锌/银空心颗粒，用于增强抗菌活性和伤口愈合。X 射线衍射 (XRD)、透射电子显微镜 (TEM) 和 X 射线光电子能谱 (XPS) 证实了氧化锌基质中的空心结构和银纳米粒子的均匀分布。紫外可见光谱和陶氏图谱分析表明，银的表面等离子体共振（SPR）导致带隙减小，从而改善了可见光范围内的光吸收。针对大肠杆菌（E. coli）和耐甲氧西林金黄色葡萄球菌（MRSA）的抗菌测试表明，与纯氧化锌相比，氧化锌/银复合材料在可见光下的抗菌效果显著增强。利用电子顺磁共振（EPR）光谱研究了抗菌机制，证实了活性氧（˙OH 和 ˙O₂-）的生成。这些结果表明，氧化锌/银空心复合材料是抗菌涂层和伤口愈合应用的理想候选材料，尤其是在可见光活化条件下。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.