Modifying polymeric membrane with expansible microgels containing silver nanoparticles: regulating the catalytic activity by forced convection in three-dimensional network

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-08-29 DOI:10.1007/s00289-024-05467-8

Yawen Li, Guoyang Ma, Shaohong Xu, Saad Ahmed, Usman Farooq, Muhammad Usman, Zunaira Talib

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Abstract

Noble metal nanoparticles (NMNPs) are crucial for catalytic processes, but their recycling and aggregation present challenges. Immobilizing NMNPs on substrates often reduces their catalytic activity due to hindered diffusion and decreased surface area. This study presents a novel approach using silver (N-Isopropylacrylamide Co methyl acrylic acid) (Ag@PNM) nanoparticles, characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), dynamic light scattering transmission (DLS), transmission electron microscopy (TEM) and UV–visible spectroscopy. A catalytic membrane with silver nanoparticles (Ag NPs) embedded in a three-dimensional (3D) network of hybrid microgels was fabricated. The microgels are filtered into a microporous membrane and expanded to secure the Ag NPs, enhancing catalytic efficiency for 4-nitrophenol reduction through improved mass transfer and exposure of the nanoparticles. The membrane shows high stability and performance, with a turnover frequency of 77.5 h⁻¹ and an apparent rate constant (k_app) of 0.15 s⁻¹. Additionally, the PES/Ag@PNM membrane demonstrated effective reduction of 4-nitrophenol. The straightforward synthesis and stability of this approach make it a promising and cost-effective solution for industrial applications.

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用含银纳米颗粒的可膨胀微凝胶改性聚合物膜：通过三维网络中的强制对流调节催化活性

贵金属纳米粒子（NMNPs）对催化过程至关重要，但其回收和聚集却带来了挑战。将 NMNPs 固定在基底上往往会因扩散受阻和表面积减少而降低其催化活性。本研究提出了一种使用银（N-异丙基丙烯酰胺-丙烯酸甲酯）（Ag@PNM）纳米粒子的新方法，并通过傅立叶变换红外光谱（FTIR）、热重分析（TGA）、动态光散射透射（DLS）、透射电子显微镜（TEM）和紫外-可见光谱对其进行了表征。研究人员制作了一种催化膜，银纳米粒子（Ag NPs）被嵌入到混合微凝胶的三维（3D）网络中。微凝胶被过滤到微孔膜中并膨胀以固定银纳米粒子，通过改善传质和纳米粒子的暴露提高了 4-硝基苯酚还原的催化效率。这种膜具有很高的稳定性和性能，其周转频率为 77.5 h-1，表观速率常数（kapp）为 0.15 s-1。此外，PES/Ag@PNM 膜还能有效还原 4-硝基苯酚。这种方法的直接合成和稳定性使其在工业应用中成为一种前景广阔且具有成本效益的解决方案。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

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."