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Facile fabrication of a multifunctional aramid nanofiber-based composite paper

机译：嵌合芳族聚酰胺纳米纤维基复合纸的舒适性

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Nowadays, aramid nanofibers (ANFs), split from macroscopic Kevlar yarns in dimethyl sulfoxide (DMSO) and potassium hydroxide (KOH), can be used as versatile building blocks for macroscopic materials. Herein, novel Ag nanoparticles (NPs)/ANFs composite papers were facilely fabricated with a simple solution-blending and vacuum-filtration assembly. By adeptly exploiting the in situ reduction of dimethyl sulfoxide (DMSO), the Ag NPs with mean size of ～10.2 nm can be well dispersed onto the surfaces of ANFs with electrostatic attraction between Ag ~(+) ions and amide anions. The as-prepared Ag/ANFs composite papers exhibited flexibility and good mechanical and conductive properties. Moreover, the Ag/ANFs composite papers can act as high-performance catalysts and excellent surface enhanced Raman spectroscopy (SERS) substrates. When the feed weight ratios of ANFs and AgNO _(3) achieved 1?:?10, the Ag/ANFs-1?:?10 composite papers showed outstanding catalytic performance for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of NaBH _(4) with a high first-order rate constant of 0.33 min ~(?1) . In addition, the Ag/ANFs-1?:?5 composite paper exhibited highly active and sensitive SERS enhancement for Rhodamine 6G (R6G) molecules at a detection limit of 10 ~(?12) M.
机译：如今，来自二甲基亚甲醚（DMSO）和氢氧化钾（KOH）中的宏观kevlar纱线分离的芳族氧化物纳米纤维（ANF）可用作宏观材料的多功能建筑块。这里，用简单的溶液共混和真空过滤组件，施用新型Ag纳米颗粒（NPS）/ AnFS复合纸。通过对二甲基亚砜（DMSO）的原位还原进行胃部，具有平均〜10.2nm的Ag NP可以很好地分散到Ag〜（+）离子和酰胺阴离子之间的静电吸引的ANF的表面上。制备的AG / ANFS复合纸具有灵活性和良好的机械和导电性能。此外，Ag / Anfs复合纸可作为高性能催化剂和优异的表面增强拉曼光谱（SERS）基材。当ANFS和AgNO _（3）的饲料重量比达到1？：10，AG / ANFS-1？：10复合纸显示出4-硝基苯酚（4-NP）减少4-硝基苯酚（4-NP）至4的突出催化性能。 - 氨基酚（4-AP）在NaBH _（4）存在下，高阶速率常数为0.33分钟〜（？1）。此外，AG / ANFS-1？：α：5复合纸在检测极限为10〜（α2）米的检测极限下表现出高活性和敏感的SERs增强rhodamine 6g（R6G）分子。

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