3D superhydrophilic polypyrrole nanofiber mat for highly efficient adsorption of anionic azo dyes
3D superhydrophilic polypyrrole nanofiber mat for highly efficient adsorption of anionic azo dyes
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3D超亲水聚吡咯纳米纤维垫可高效吸附阴离子偶氮染料
DOI：
10.1016/j.microc.2020.105389
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发表时间：
2020-12
影响因子：
4.8
通讯作者：
Lan-ling Chu
中科院分区：
文献类型：
--
作者：
Fei-Fei Qi;Tian-You Ma;Yan Liu;Ya-Meng Fan;Jia-Qiao Li;Yan Yu;Lan-ling Chu
对高性能、高性价比、易操作、可回收的有机染料脱除吸附剂的需求日益突出。虽然聚吡咯(PPy)已被证明在吸附阴离子偶氮染料(AADS)方面具有很好的应用前景，但基于PPy的颗粒和纤维的使用仍然面临着诸如难以分离和不希望的传质等限制。本文以电纺PAN@PVP纳米纤维毡为基材，通过原位聚合和冷冻干燥，制备了具有三维蓬松多孔结构的超亲水聚吡咯纳米纤维毡(PPy NFM)。与2D片状PPy NFM相比，3D PPy NFM对AADS具有较快的吸附速率(3h内)和较高的吸附容量(高达234.62 mg g−1)。重复使用5次后，对AADS的吸附容量下降不到10%。3D PPy NFM的另一个显著优势在于分散性和完整性的一体化，使其易于使用和回收，无需离心或过滤。此外，还对三种染料模型MY、AO7和AY9的吸附行为进行了详细的讨论，表明PPy NFM对AADS的吸附涉及静电吸引、π-π相互作用和氢键等多种机制，从而保证了较高的吸附效率。这些吸引人的特性使3D PPy NFM在染料废水处理中成为一种潜在的生态友好型吸附剂。
The demand for cost-effective, easy-handling, and recyclable adsorbents with high performance for removal of organic dyes is gaining prominence. Although polypyrrole (PPy) has proven to be promising for adsorption of anionic azo dyes (AADs), the use of PPy-based particles and fibers still faces limitations such as challenging separation and undesirable mass transfer. In this work, a superhydrophilic polypyrrole nanofiber mat (PPy NFM) with a 3D fluffy porous structure was developed via in situ polymerization of pyrrole monomers with electrospun PAN@PVP NFM as the substrate and followed by freeze-drying. The 3D PPy NFM exhibited a fast adsorption rate (within 3 h) and high adsorption capacity (up to 234.62 mg g−1) towards AADs, remarkably superior to those of 2D lamellar PPy NFM. After five times of reuse, the reduction of adsorption capacities for AADs was less than 10%. Another striking advantage of the 3D PPy NFM lies in the integration of dispersibility and integrity, making it easy to use and recycle without centrifugation or filtration. Moreover, the adsorption behaviors of three dye models, Metanil Yellow (MY), Acid Orange 7 (AO7), and Acid Yellow 9 (AY9), were thoroughly discussed, suggesting that the adsorption of AADs by the PPy NFM involves multiple mechanisms, including electrostatic attraction, π–π interaction and hydrogen bonding, thus ensuring high adsorption efficiency. These attractive characteristics make 3D PPy NFM be a potential eco-friendly adsorbent in dye wastewater treatment.
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影响因子：
13.6
作者：
Jianqiang Wang;K. Pan;Qiwei He;B. Cao
通讯作者：
Jianqiang Wang;K. Pan;Qiwei He;B. Cao
影响因子：
11.1
作者：
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影响因子：
37.4
作者：
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影响因子：
15.1
作者：
Li, Xiaoli;Lu, Haijun;He, Fu
通讯作者：
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影响因子：
5.3
作者：
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通讯作者：
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