Synthesis of cerium dioxide–calcium oxide composite antibacterial materials and their use for water treatment and dye degradation

IF 4.8 3区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Annals of the New York Academy of Sciences Pub Date : 2025-09-05 DOI:10.1111/nyas.70040

Qianqian Guo, Wei Geng, Donghui Yang, Guanbin Wen, Qing Wang, Dong Yang, Bin Zhang

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引用次数: 0

Abstract

Bacterial infections have become a major challenge to global public health security. In this study, based on the concept of green synthesis, three cerium dioxide (CeO2)–calcium oxide (CaO) composites (CS–CeO2@CaO, CT–CeO2@CaO, and CTD–CeO2@CaO) were developed using chemical hydrothermal (CS), chrysanthemum tea impregnation (CT), and residue impregnation (CTD). Eggshell‐derived calcium oxide was used as the carrier, in combination with the functional components of chrysanthemum tea and its residue extract. The antibacterial efficacy of these materials against Escherichia coli exceeded 90% at a concentration of 50 µg/mL, and their bactericidal performance in water remained stable after six treatment cycles. Structural characterization experiments revealed that CT and CTD composites exhibited larger specific surface areas and hierarchical pores, which enhanced bacterial adsorption via π–π* interactions. X‐ray photoelectron spectroscopy analysis indicated that Ca2+ released from the eggshell‐derived CaO caused ionic interference, while Ce3+/Ce4+ redox pairs generated reactive oxygen species, together establishing a synergistic adsorption–ion–oxidation antimicrobial mechanism. Additionally, the composites exhibited dual water treatment functions: an 80% degradation of methylene blue within 40 min and efficient biofilm removal. By valorizing waste resources (eggshells and tea residues), this work offers a sustainable approach to develop cost‐effective multifunctional materials for addressing drug‐resistant bacterial infections and remediating dye‐contaminated wastewater.

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二氧化铈-氧化钙复合抗菌材料的合成及其在水处理和染料降解中的应用

细菌感染已成为全球公共卫生安全面临的重大挑战。本研究基于绿色合成理念，采用化学水热法（CS）、菊花茶浸渍法（CT）和渣浸渍法（CTD）制备了三种二氧化铈(CeO2) -氧化钙（CaO）复合材料（CS - CeO2@CaO、CT - CeO2@CaO和CTD - CeO2@CaO）。以蛋壳源性氧化钙为载体，结合菊花茶及其渣提取物的功能成分。在浓度为50µg/mL时，这些材料对大肠杆菌的抗菌效果超过90%，并且在6个处理周期后，其在水中的杀菌性能保持稳定。结构表征实验表明，CT和CTD复合材料具有更大的比表面积和分层孔隙，通过π -π *相互作用增强了细菌的吸附。X射线光电子能谱分析表明，蛋壳生成的氧化钙释放Ca2+引起离子干扰，而Ce3+/Ce4+氧化还原对产生活性氧，共同建立了吸附-离子-氧化协同抗菌机制。此外，复合材料具有双重水处理功能：在40分钟内降解80%的亚甲基蓝，并有效去除生物膜。通过对废物资源（蛋壳和茶叶残留物）进行估价，本研究为开发具有成本效益的多功能材料提供了一种可持续的方法，可用于解决耐药细菌感染和修复染料污染的废水。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of the New York Academy of Sciences 综合性期刊-综合性期刊

CiteScore

11.00

自引率

1.90%

发文量

193

审稿时长

2-4 weeks

期刊介绍： Published on behalf of the New York Academy of Sciences, Annals of the New York Academy of Sciences provides multidisciplinary perspectives on research of current scientific interest with far-reaching implications for the wider scientific community and society at large. Each special issue assembles the best thinking of key contributors to a field of investigation at a time when emerging developments offer the promise of new insight. Individually themed, Annals special issues stimulate new ways to think about science by providing a neutral forum for discourse—within and across many institutions and fields.