Tannic acid-assisted green functionalization of Clinoptilolite: A step-by-step characterization of silver nanoparticles in situ reduction

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.151

Francesca Gattucci, Mari Lallukka, Nadia Grifasi, Marco Piumetti, Marta Miola

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Abstract

Recently, the reduction of airborne pathogens and the need for clean and controlled air have gained researchers’ attention. The use of natural zeolites and in particular clinoptilolite as solutions for wastewater treatment and air purification has proven effective due to the remarkable ability of these materials to adsorb toxic compounds.

In this work, the clinoptilolite powders are subjected to an eco-friendly in situ functionalization process using tannic acid to induce silver nanoparticles (AgNPs) nucleation, improving the antimicrobial potential of the zeolite. The focus of this work is the characterization of this multi-step functionalization process by morphological, compositional and structural analyses.

The Fourier transform infrared investigation confirms the successful functionalization of clinoptilolite with tannic acid, establishing a foundational step in the process. Successive morphological and compositional analyses verify the introduction of AgNPs onto the zeolite surface, revealing a highly uniform distribution of AgNPs. Furthermore, structural analysis verifies the presence of metallic silver. Finally, the antibacterial efficacy was verified for both Gram-positive and negative bacteria by zone of inhibition test.

The functionalization of clinoptilolite with AgNPs, achieved without heat treatment or harmful chemicals, offers a promising solution for absorbing toxic compounds while simultaneously preventing bacterial growth. In the future, this innovative approach could play a crucial role in air purification systems targeting airborne pathogens.

Abstract Image

查看原文本刊更多论文

单宁酸辅助斜发沸石的绿色功能化：银纳米颗粒原位还原的一步一步表征

近年来，空气中病原体的减少以及对清洁和受控空气的需求引起了研究人员的关注。使用天然沸石，特别是斜沸石作为废水处理和空气净化的解决方案已被证明是有效的，因为这些材料具有吸附有毒化合物的显着能力。在这项工作中，利用单宁酸诱导银纳米颗粒（AgNPs）成核，对斜沸石粉末进行了生态友好的原位功能化处理，提高了沸石的抗菌潜力。这项工作的重点是通过形态、成分和结构分析来表征这一多步骤功能化过程。傅里叶变换红外研究证实了斜沸石与单宁酸的成功功能化，奠定了该过程的基础步骤。连续的形态和成分分析证实了AgNPs在沸石表面的引入，揭示了AgNPs的高度均匀分布。此外，结构分析证实了金属银的存在。最后通过抑菌区试验验证其对革兰氏阳性菌和阴性菌的抑菌效果。利用AgNPs实现斜沸石功能化，无需热处理或使用有害化学物质，为吸收有毒化合物同时防止细菌生长提供了一种很有前途的解决方案。在未来，这种创新的方法可能在针对空气传播病原体的空气净化系统中发挥关键作用。

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

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.