The impact of Ag dopant on the photocatalytic activity toward methylene blue and antimicrobial activities of g-C3N4/ZnO nanocomposite

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2024-11-18 DOI:10.1007/s10853-024-10408-x

Ahmed Mysara, Mohamed Morsy, Asmaa O. Ahmed, Fayza Ahmed Ibrahim, Amir Elzwawy

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Abstract

Water contamination is one of the greatest challenges that need to be addressed because it directly impacts every living thing on the entire globe, including humans. The primary source of contamination, particularly dyes, in water, is factory runoff onto flowing streams. In the current study, ZnO/graphitic carbon nitride (ZnO/g-C₃N₄)-doped Ag metal was prepared using a co-precipitation approach to investigate photocatalytic efficiency and antimicrobial activity on methylene blue dye. The as-prepared nanocomposites were characterized by XRD, SEM, EDX, FTIR, BET, and UV. They revealed a high BET surface area, which could increase the adsorption capacity and photodegradation efficiency. The photocatalytic activity of the ZnO/g-C₃N₄-Ag nanocomposites was determined using methylene blue dye under visible light activation. Samples ZnO/g-C₃N₄ and ZnO/g-C₃N₄ doped with 1.0 M Ag revealed the best photocatalytic performance; they revealed high removal efficiencies of about 97.4 and 97%, respectively, after 120 min of light exposure. The nanocomposite revealed antimicrobial activity against different pathogens of G-negative (E. coli) and G-positive bacteria (Staphylococcus); again, samples ZnO/g-C₃N₄ and ZnO/g-C₃N₄-1.0 M Ag revealed the highest zone of inhibition (ZOI) on E. coli and Staphylococcus, respectively.

Graphical Abstract

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掺杂银对 g-C3N4/ZnO 纳米复合材料亚甲基蓝光催化活性和抗菌活性的影响

水污染是亟待解决的最大挑战之一，因为它直接影响到包括人类在内的全球所有生物。水污染（尤其是染料）的主要来源是流向溪流的工厂径流。本研究采用共沉淀法制备了掺杂银金属的氧化锌/石墨化氮化碳（ZnO/g-C3N4）纳米复合材料，以研究其对亚甲蓝染料的光催化效率和抗菌活性。对制备的纳米复合材料进行了 XRD、SEM、EDX、FTIR、BET 和 UV 表征。结果表明，纳米复合材料具有较高的 BET 表面积，从而提高了吸附能力和光降解效率。在可见光活化条件下，使用亚甲基蓝染料测定了 ZnO/g-C3N4-Ag 纳米复合材料的光催化活性。ZnO/g-C3N4 样品和掺杂 1.0 M Ag 的 ZnO/g-C3N4 样品的光催化性能最好；在光照射 120 分钟后，它们的去除率分别达到约 97.4% 和 97%。纳米复合材料对不同病原体的 G 阴性菌（大肠杆菌）和 G 阳性菌（葡萄球菌）具有抗菌活性；同样，ZnO/g-C3N4 和 ZnO/g-C3N4-1.0 M Ag 样品对大肠杆菌和葡萄球菌的抑制区（ZOI）分别最高。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.