Enhanced antibacterial activity, dye rejection and anti-fouling performance of ZrO2-SiO2 composite ceramic membranes embedded by silver nanoparticles

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-02-15 DOI:10.1007/s10971-025-06697-6

Yutian Mei, Jing Yang, Ruifeng Zhang, Hongji Li, Yingming Guo

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引用次数: 0

Abstract

The ceramic membranes hold significant promise for dye wastewater treatment, owing to their exceptional water permeability, mechanical strength, and chemical stability. However, membrane fouling causes undesired filtration performance. In this study, the Ag/ZrO₂-SiO₂ composite ceramic membranes with varying molar ratios of Ag/Si (n_Ag) were fabricated by incorporating AgNO₃ into the ZrO₂-SiO₂ matrix using the sol−gel method. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements revealed that the doped Ag element exists in the form of metallic Ag⁰ nanoparticles (AgNPs). The introduction of AgNPs was found to optimize the surface microstructure and control the charge properties of the membrane, thus enhancing the dye rejection performance of Ag/ZrO₂-SiO₂ membranes under various filtration conditions. The effect of n_Ag was studied to establish an optimal balance between antibacterial activity and dye rejection performance. The optimized Ag_0.1/ZrO₂-SiO₂ (n_Ag = 0.1) materials displayed superior antibacterial activity evidenced by antibacterial efficiency of 98.86% against Escherichia coli and 97.42% against Staphylococcus aureus. Furthermore, the Ag_0.1/ZrO₂-SiO₂ membrane exhibited a remarkable rejection of 96.74% and a flux of 331.36 L m⁻² h⁻¹ for 50 mg L⁻¹ reactive black KN−B solution at 2 bar and 25 °C. Compared to the ZrO₂-SiO₂ membrane, the Ag_0.1/ZrO₂-SiO₂ membrane indicated enhanced rejections of the five dyes with various molecular weights along with excellent anti-fouling performance of reactive black KN-B with a flux recovery of 91.18% after three anti-fouling filtration cycles. This study highlights the potential of the Ag/ZrO₂-SiO₂ membrane for effective dye wastewater treatment.

Graphical Abstract

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纳米银包埋ZrO2-SiO2复合陶瓷膜的抑菌活性、脱染性能和防污性能增强

陶瓷膜由于其优异的透水性、机械强度和化学稳定性，在染料废水处理中具有重要的前景。然而，膜污染会导致不理想的过滤性能。在本研究中，采用溶胶-凝胶法将AgNO3掺入ZrO2-SiO2基体中，制备了具有不同Ag/Si摩尔比（nAg）的Ag/ZrO2-SiO2复合陶瓷膜。x射线衍射（XRD）和x射线光电子能谱（XPS）测量结果表明，掺杂的Ag元素以金属Ag0纳米粒子（AgNPs）的形式存在。发现AgNPs的引入可以优化膜的表面微观结构，控制膜的电荷特性，从而提高Ag/ZrO2-SiO2膜在各种过滤条件下的抗染性能。研究了nAg的作用，以建立抗菌活性和脱染性能之间的最佳平衡。优化后的Ag0.1/ZrO2-SiO2 （nAg = 0.1）材料对大肠杆菌的抑菌率为98.86%，对金黄色葡萄球菌的抑菌率为97.42%。此外，Ag0.1/ZrO2-SiO2膜在2 bar和25°C条件下对50 mg L−1活性黑色KN−B溶液的去除率为96.74%，通量为331.36 L m−2 h−1。与ZrO2-SiO2膜相比，Ag0.1/ZrO2-SiO2膜对5种不同分子量染料的去除率提高，对活性黑KN-B的抗污性能也较好，经过3次抗污过滤，通量回收率达到91.18%。该研究突出了Ag/ZrO2-SiO2膜在染料废水处理中的潜力。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.