Photocatalytic dye degradation efficacy and antimicrobial potency of zinc oxide nanoparticles synthesized via sol-gel method

Next Materials Pub Date : 2025-07-23 DOI:10.1016/j.nxmate.2025.100972

Vishwajeet V.Aherkar , Ali Abdulmawjood Mohammed , Anmar A. Al-Shimary , Vidyarani Kshirsagar , Ravindra Shendage , Panchsheela A. Ubale , Sidhaling B. Bhairunagi , Rekha M. Ovhal

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Abstract

In the sol-gel process, precursor solutions are converted to an intermediate stage that mimics gel before solidifying. This work reports the synthesis of zinc oxide nanoparticles (ZnO NPs) through aforesaid method, which significantly provides fine control over particle size, shape, and crystallinity. X-ray diffraction (XRD) revealed hexagonal wurtzite ZnO NPs with a diameter of around 22 nm crystallite size. To explore morphological and structural analysis, a Field Emission Scanning Electron Microscope (FESEM) and a High Resolution Transmission Electron Microscope (HRTEM) were employed. The results showed that the nano atmosphere possessed a combination of particles and nanorod-like structures with agglomeration. The as-prepared ZnO NPs are then used to investigate the dye degradation and antimicrobial properties. The results showed 62.96 % efficiency of ZnO NPs to degrade the methylene blue dye through photodegradation process. The antibacterial activity against the Gram-positive and Gram-negative bacterial strains S. aureus and P. aeruginosa, as well as the fungal strain C. albicans is observed.

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溶胶-凝胶法制备氧化锌纳米颗粒的光催化降解染料效果及抗菌效能

在溶胶-凝胶过程中，前驱体溶液在凝固前转化为模拟凝胶的中间阶段。本工作报道了通过上述方法合成氧化锌纳米颗粒（ZnO NPs），该方法显著地提供了对颗粒大小，形状和结晶度的精细控制。x射线衍射（XRD）显示了直径约为22 nm的六方纤锌矿ZnO NPs。采用场发射扫描电镜（FESEM）和高分辨率透射电镜（HRTEM）进行形态学和结构分析。结果表明，纳米气氛具有颗粒和纳米棒状结构的结块。制备的ZnO纳米粒子用于研究染料降解和抗菌性能。结果表明，ZnO纳米粒子对亚甲基蓝染料的光降解效率为62.96 %。对革兰氏阳性和革兰氏阴性菌株金黄色葡萄球菌和铜绿假单胞菌以及真菌菌株白色念珠菌的抑菌活性进行了观察。

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