Copper-doped ZnO-chitin-cellulose mesoporous nanostructures for enhanced structural, optoelectronic, and antimicrobial efficacy

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2025-02-02 DOI:10.1002/vnl.22201

Amany M. El Nahrawy, M. K. Seddeek

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引用次数: 0

Abstract

This study shows the development and characterization of innovative mesoporous Cu-doped ZnO-chitin-cellulose nanostructures, leveraging a semi-dissolved chitin templating approach to reinforce their structural and functional properties. This innovative approach enhances the structural and functional properties of the composites, demonstrating significant advancements in optoelectronic and antimicrobial performance. FTIR peaks at 971, 787, 621, and 482 cm⁻¹ suggest metal-oxygen vibrations and interactions between Zn, Cu ions, and functional groups in the chitin-cellulose matrix. The chitin-cellulose and ZnO-chitin-cellulose composite were influenced by the presence of Cu ions, by the appearance of absorption peaks at 240 and 303 nm. Incorporating Zn and ZnCu ions altered the composite's bandgap, reducing it from 3.6 to 2.75 eV, thereby enhancing its optical properties. Band gap analysis manifests a decrease in energy gap attributed to Cu doping and the interaction between Cu-3d and O-2p states. The antimicrobial efficacy of chitin-cellulose composites loaded with Zn and ZnCu was significantly enhanced compared to the unloaded samples, with the loaded composites achieving nanoparticle sizes ranging from 26 to 32 nm, respectively. Significant antibacterial activity was observed, with zones of inhibition measured at 26–29 ± 1 mm for E. coli, 29–30 ± 1 mm for B. subtilis, 26–24 ± 1 mm for C. albicans, and 30–32 mm ± 1 for A. fumigatus. The addition of Cu-doped ZnO into the chitin-cellulose matrix significantly enhances the composite's surface area, band gap, photonic activity, and antimicrobial activity, further amplifying its functionality. These advanced properties position the materials as highly suitable for diverse critical applications, including active packaging, drug delivery systems, optoelectronic, and UV shielding solutions.

Highlights

Innovative mesopores Copper@ ZnO-Chitin-Cellulose nanostructures.
Nanoparticle ratios influence the properties of chitin-cellulose nanostructures.
Cu@ ZnO enhances absorption and decreases the band gap, providing strong UV protection.
Bioactive mesoporous structures display strong antimicrobial efficacy for biomedical use.

Abstract Image

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铜掺杂zno -几丁质-纤维素介孔纳米结构用于增强结构、光电和抗菌功效

本研究展示了新型介孔cu掺杂zno -几丁质纤维素纳米结构的发展和表征，利用半溶解几丁质模板方法来增强其结构和功能特性。这种创新的方法增强了复合材料的结构和功能特性，在光电和抗菌性能方面取得了重大进展。FTIR峰位于971、787、621和482 cm−1处，表明甲壳素-纤维素基质中金属-氧振动以及Zn、Cu离子和官能团之间的相互作用。甲壳素-纤维素和zno -甲壳素-纤维素复合材料受Cu离子存在的影响，在240和303 nm处出现吸收峰。加入Zn和Zn - Cu离子改变了复合材料的带隙，将其从3.6 eV降低到2.75 eV，从而增强了其光学性能。带隙分析表明，Cu掺杂和Cu-3d态与O-2p态的相互作用使能隙减小。负载Zn和Zn - Cu的甲壳素-纤维素复合材料的抗菌效果显著增强，纳米颗粒尺寸分别在26 ~ 32 nm之间。抑菌活性显著，大肠杆菌抑菌区为26 ~ 29±1 mm，枯草芽孢杆菌抑菌区为29 ~ 30±1 mm，白色念珠菌抑菌区为26 ~ 24±1 mm，烟曲霉抑菌区为30 ~ 32 mm。在甲壳素-纤维素基体中加入cu掺杂的ZnO，显著提高了复合材料的表面积、带隙、光子活性和抗菌活性，进一步增强了其功能性。这些先进的性能使材料非常适合各种关键应用，包括活性包装，药物输送系统，光电和紫外线屏蔽解决方案。重点创新中孔铜@ zno -几丁质纤维素纳米结构。纳米颗粒比例影响甲壳素-纤维素纳米结构的性质。Cu@ ZnO增强吸收，减小带隙，提供强大的紫外线防护。生物活性介孔结构在生物医学上具有很强的抗菌效果。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.