在 PVA 纳米纤维上原位绿色合成铁纳米粒子及其在吸附去除亚甲基蓝中的应用

IF 3.1 3区 化学 Q2 POLYMER SCIENCE
Mahdi Filsara, Zahra‑Beagom Mokhtari‑Hosseini, Masoumeh Mansoori-Rashvanloo
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引用次数: 0

摘要

本研究提出了一种新型环保除漆方法,重点是利用嵌入聚乙烯醇纳米纤维中的铁纳米粒子高效去除水环境中的亚甲基蓝。在优化的条件下,采用绿茶提取物的绿色方法合成了铁纳米粒子,并通过 FESEM、DLS、TGA、DTG、EDS、FTIR 和 XRD 对其进行了表征。合成的铁纳米粒子的平均尺寸为 22 nm。将纳米颗粒嵌入聚乙烯醇纳米纤维的制造技术有两种:电纺含纳米铁颗粒的溶液和在聚乙烯醇纳米纤维上原位合成纳米颗粒。比较分析表明,在纳米纤维上原位合成纳米粒子时,亚甲基蓝吸附率更高。包括 FESEM、XRD 和 FTIR 在内的表征技术证实了纳米纤维上成功形成了纳米颗粒。采用中心复合设计(CCD)的响应面法找到了最佳去除条件。最佳去除率(85%)出现在 pH 值为 8.6、初始亚甲基蓝浓度为 30 mg/L、纳米纤维剂量为 1.6 g/L、接触时间为 100 分钟的吸附条件下。动力学研究表明纳米纤维具有伪二阶吸附模型,而朗缪尔等温线分析表明其最大吸附容量为 24.509 mg/g。热力学分析表明,吸附过程具有自发和放热的性质。这种复合膜是去除废水中染料的一种高效、经济的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

In situ green synthesis of iron nanoparticles on PVA nanofiber and its application in adsorptive removal methylene blue

In situ green synthesis of iron nanoparticles on PVA nanofiber and its application in adsorptive removal methylene blue

This study presents a novel approach for environmentally friendly paint removal, focusing on the efficient removal of methylene blue from aqueous environments using iron nanoparticles embedded in polyvinyl alcohol nanofibers. Iron nanoparticles were synthesized via a green method employing green tea extract under optimized conditions and characterized by FESEM, DLS, TGA, DTG, EDS, FTIR, and XRD. The average size of synthesized iron nanoparticles was 22 nm. Two fabrication techniques were employed to embed the nanoparticles into polyvinyl alcohol nanofibers: electrospinning of a solution containing iron nanoparticles, and in situ synthesis of nanoparticles on the PVA nanofibers. Comparative analyses revealed superior methylene blue adsorption rates when nanoparticles were synthesized in situ on the nanofibers. Characterization techniques, including FESEM, XRD, and FTIR, confirmed the successful formation of nanoparticles on the nanofibers. Response surface method using central composite design (CCD) was performed to find the optimal removal conditions. Optimal removal (85%) occurred under adsorption conditions of pH 8.6, an initial methylene blue concentration of 30 mg/L, a nanofiber dose of 1.6 g/L, and a contact time of 100 min. Kinetic studies demonstrated a pseudo-second-order adsorption model, while Langmuir isotherm analysis indicated a maximum adsorption capacity of 24.509 mg/g. Thermodynamic analysis suggested the spontaneous and exothermic nature of the adsorption process. This composite membrane is an efficient and economical method for removal dye from wastewaters.

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来源期刊
Polymer Bulletin
Polymer Bulletin 化学-高分子科学
CiteScore
6.00
自引率
6.20%
发文量
0
审稿时长
5.5 months
期刊介绍: "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."
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