Sustainable electrospun PAN@SiO₂*Ag nanofiber composites for efficient removal of toxic Cr(VI) from contaminated water

IF 5.9 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications Pub Date : 2026-04-01 Epub Date: 2026-02-02 DOI:10.1016/j.inoche.2026.116266

Mohamed R. El-Aassar

{"title":"Sustainable electrospun PAN@SiO₂*Ag nanofiber composites for efficient removal of toxic Cr(VI) from contaminated water","authors":"Mohamed R. El-Aassar","doi":"10.1016/j.inoche.2026.116266","DOIUrl":null,"url":null,"abstract":"<div><div>Hexavalent chromium (Cr(VI)), a highly toxic and persistent water pollutant, poses serious environmental and public health risks. Therefore, the development of effective, reusable, and nanostructured adsorbents is essential for improving wastewater treatment technologies. In this study, electrospun polyacrylonitrile@silica*silver (PAN@SiO₂*Ag) composite nanofibers were developed and characterized to synergistically enhance surface functionality, adsorption efficiency, and reusability for Cr(VI) removal. PAN@SiO₂*Ag composite nanofibers were fabricated via a sol–gel synthesis of SiO₂Ag followed by electrospinning and characterized using FE-SEM, TEM, FTIR, XRD, TGA, and BET analyses. The nanofibers exhibited enhanced mesoporosity and thermal stability, achieving a maximum Cr(VI) adsorption capacity of 221.73 mg/g at pH 2.0, with adsorption kinetics following a pseudo-second-order model and equilibrium behavior best described by the Freundlich isotherm. Adsorption kinetics were well described by a pseudo-second-order model, while equilibrium data followed the Freundlich isotherm, indicating heterogeneous, multilayer adsorption. Thermodynamic analysis indicated that the adsorption process was both spontaneous and endothermic, reflecting favorable interfacial interactions between Cr(VI) ions and the composite surface. Moreover, the nanofibers exhibited excellent regeneration and reuse performance over multiple adsorption–desorption cycles, highlighting their structural stability and practical applicability. These results demonstrate the practical potential of PAN@SiO₂*Ag nanofibers as a potential and reusable way to remove heavy metals from wastewater treatment systems.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"186 ","pages":"Article 116266"},"PeriodicalIF":5.9000,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Communications","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387700326001322","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/2 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}

引用次数: 0

Abstract

Hexavalent chromium (Cr(VI)), a highly toxic and persistent water pollutant, poses serious environmental and public health risks. Therefore, the development of effective, reusable, and nanostructured adsorbents is essential for improving wastewater treatment technologies. In this study, electrospun polyacrylonitrile@silica*silver (PAN@SiO₂*Ag) composite nanofibers were developed and characterized to synergistically enhance surface functionality, adsorption efficiency, and reusability for Cr(VI) removal. PAN@SiO₂*Ag composite nanofibers were fabricated via a sol–gel synthesis of SiO₂Ag followed by electrospinning and characterized using FE-SEM, TEM, FTIR, XRD, TGA, and BET analyses. The nanofibers exhibited enhanced mesoporosity and thermal stability, achieving a maximum Cr(VI) adsorption capacity of 221.73 mg/g at pH 2.0, with adsorption kinetics following a pseudo-second-order model and equilibrium behavior best described by the Freundlich isotherm. Adsorption kinetics were well described by a pseudo-second-order model, while equilibrium data followed the Freundlich isotherm, indicating heterogeneous, multilayer adsorption. Thermodynamic analysis indicated that the adsorption process was both spontaneous and endothermic, reflecting favorable interfacial interactions between Cr(VI) ions and the composite surface. Moreover, the nanofibers exhibited excellent regeneration and reuse performance over multiple adsorption–desorption cycles, highlighting their structural stability and practical applicability. These results demonstrate the practical potential of PAN@SiO₂*Ag nanofibers as a potential and reusable way to remove heavy metals from wastewater treatment systems.

Abstract Image

查看原文本刊更多论文

可持续静电纺PAN@SiO₂*Ag纳米纤维复合材料，用于有效去除污染水中的有毒Cr（VI）

六价铬（Cr(VI)）是一种剧毒和持久性水污染物，对环境和公众健康构成严重风险。因此，开发有效的、可重复使用的纳米结构吸附剂对于改善废水处理技术至关重要。在这项研究中，电纺丝polyacrylonitrile@silica*银（PAN@SiO₂*Ag）复合纳米纤维被开发和表征，以协同增强表面功能，吸附效率和可重复使用性去除Cr（VI）。采用溶胶-凝胶法制备了PAN@SiO₂*Ag复合纳米纤维，并采用FE-SEM、TEM、FTIR、XRD、TGA和BET等手段对其进行了表征。纳米纤维表现出增强的介孔性和热稳定性，在pH为2.0时最大吸附Cr（VI）容量为221.73 mg/g，吸附动力学符合准二阶模型，平衡行为最好用Freundlich等温线描述。吸附动力学用拟二阶模型很好地描述，而平衡数据遵循Freundlich等温线，表明非均相的多层吸附。热力学分析表明，吸附过程是自发和吸热的，反映了Cr（VI）离子与复合材料表面良好的界面相互作用。此外，纳米纤维在多次吸附-解吸循环中表现出优异的再生和再利用性能，突出了其结构稳定性和实用性。这些结果证明了PAN@SiO₂*Ag纳米纤维作为一种潜在的可重复使用的方法从废水处理系统中去除重金属的实际潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.